-Why Choose Us-

  • Capacity. Strength

    18 years experience in the production of electroplating chemicals 5000 square meters of its own base.

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  • Qualification. Strength

    It has two national invention patents and six utility model patents.

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  • R & D. Strength

    The product formula comes from European and American laboratories, with technical support from European and American engineers.

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  • Service. Strength

    Strong technical service force, can provide supporting services according to customer's electroplating varieties and future electroplating line development.

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  • Product. Strength

    The product formulation originates from European and American laboratories, and the core raw materials are used in Germany basf, American dow chemical.

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  • Wide range of applications

    The products are widely used to meet the electroplating demand of different industries.

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FEATURED PRODUCTS

ABOUT TITLE

Guangdong Bigely Technology Co.,Ltd.Was founded in 2003, is a provincial-level high-tech enterprises with independent innovation of intellectual property rights, to focus on is engaged in the surface treatment chemicals research and development, production, sales and services, is committed to providing customers with new products and solutions, system technical support and perfect service system, help customers to say goodbye to the plating problem and create value.The main business covers electroplating additives, PCB chemical additives, aluminum surface treatment agent.

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Four reasons for poor stability of plating solution when using acid copper brightener

Four reasons for poor stability of plating solution when using acid copper brightener

Wed Feb 01 09:14:18 CST 2023

In the production process of using acid copper brightener, we need to maintain and manage the plating solution and add the brightener correctly, so as to obtain a uniform bright coating with good filling and low porosity.Sometimes the stability of the plating solution is poor, and problems such as decreased brightness and rough coating will occur, which will affect the quality of the coating. What is the reason for this?

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The blue passivation of the workpiece after the production of zinc acid barrel plating is prone to color deviation. Try this blue zinc passivator!

The blue passivation of the workpiece after the production of zinc acid barrel plating is prone to color deviation. Try this blue zinc passivator!

Tue Jan 31 10:40:59 CST 2023

Recently, Mr. Zhang found in the production process that after the blue-zinc passivation of the workpiece, the coating always appears color deviation.However, this phenomenon still exists after the passivation solution is adjusted several times.So Mr. Zheng wanted to replace a trivalent chrome blue zinc passivator that would not deflect color.

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The use of electroless nickel plating solution has these four advantages in production process

The use of electroless nickel plating solution has these four advantages in production process

Mon Jan 30 08:54:10 CST 2023

In recent years, more and more manufacturing industries have adopted the production process of electroless nickel plating solution.What advantages does it have compared with nickel electroplating process, except that it does not need additional power supply?

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Four reasons for scorching of the workpiece at both ends of the hanger during production with potassium chloride zinc plating additive

Four reasons for scorching of the workpiece at both ends of the hanger during production with potassium chloride zinc plating additive

Sun Jan 29 10:14:52 CST 2023

In the process of using potassium chloride zinc plating additive, sometimes the workpiece at both ends of the hanger is prone to scorch. What is the reason?

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Seven reasons for pinhole phenomenon in the coating during production with hard chromium additive

Seven reasons for pinhole phenomenon in the coating during production with hard chromium additive

Tue Jan 17 08:48:59 CST 2023

In the process of using hard chromium additive, the workpiece coating is prone to pinhole phenomenon, which will affect the appearance quality and production efficiency of the workpiece.What causes this?

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The acid zinc plating solution has poor temperature resistance and large production consumption. Try this potassium chloride zinc plating brightener

The acid zinc plating solution has poor temperature resistance and large production consumption. Try this potassium chloride zinc plating brightener

Mon Jan 16 09:04:14 CST 2023

Because Mr. Zhao's acid galvanizing bath is not equipped with a temperature control system, when the bath temperature is 28~32 ℃, the brightness of the coating is reduced, rough, and the adhesion is poor, and the amount of brightener is large, and the production cost is high.So Mr. Zhao wanted to find a potassium chloride zinc brightener with good temperature resistance.

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Reasons for large consumption of brightener in production with potassium chloride zinc plating additive

Reasons for large consumption of brightener in production with potassium chloride zinc plating additive

Sat Jan 14 09:25:41 CST 2023

In the production process of using potassium chloride zinc plating additive, we sometimes find that the consumption of brightener is relatively large, and we need to add more brightener than usual to meet the brightness of the workpiece, which will increase the production cost.So what is the reason for the large consumption of brightener?

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Palladium activator should be used correctly in the electroplating process of plastic parts to avoid poor adhesion of electroless nickel coating

Palladium activator should be used correctly in the electroplating process of plastic parts to avoid poor adhesion of electroless nickel coating

Fri Jan 13 08:46:43 CST 2023

The plastic workpiece is directly degummed without washing after palladium activation treatment, and then electroless nickel plating is carried out.Although the workpiece can be plated, the adhesion of the coating is not good.Is this the improper use of palladium activator?

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Six reasons why the coating is rough when using alkaline zinc nickel alloy additive

Six reasons why the coating is rough when using alkaline zinc nickel alloy additive

Thu Jan 12 08:58:49 CST 2023

In the process of using alkaline zinc-nickel alloy additives, sometimes the coating will be rough, which affects the coating quality and the effect after passivation. What is the reason?

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The brightness of the electroless nickel coating on the workpiece is poor and the performance is unstable. You can try this electroless nickel plating solution

The brightness of the electroless nickel coating on the workpiece is poor and the performance is unstable. You can try this electroless nickel plating solution

Wed Jan 11 09:06:12 CST 2023

Mr. Xu's accessories have been complained by customers about the poor brightness of the workpiece coating and the unstable performance test, which has seriously affected the service life of electronic accessories.However, after several adjustments of the plating solution, the coating brightness of the workpiece still cannot meet the customer's requirements, so Mr. Xu wanted to find a electroless nickel plating solution with good coating brightness.

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Seven key operating points of bath control when using electroless nickel plating solution for production

Seven key operating points of bath control when using electroless nickel plating solution for production

Tue Jan 10 09:18:20 CST 2023

In the production process, in order to ensure the stability of electroless nickel plating solution, prolong the service life and reduce the occurrence of faults, what are the key points of operation?

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When using acid tin plating brightener for production, attention should be paid to the influence of chloride ion on the bath

When using acid tin plating brightener for production, attention should be paid to the influence of chloride ion on the bath

Mon Jan 09 10:21:33 CST 2023

Mr. Jiang of Dongguan has opened a new acid tin plating production line, which is intended to process various copper bars and electronic components.After Mr. Jiang used the acid tin plating brightener for more than a month, the gray dark light brightness of the workpiece tin plating layer was poor, and pinholes also appeared, which seriously affected the production progress.So Mr. Jiang hurriedly asked Bigolly's engineers to help solve this problem.

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The control range of phosphite radical in plating solution during the production of electroless nickel plating solution

The control range of phosphite radical in plating solution during the production of electroless nickel plating solution

Sat Jan 07 09:14:41 CST 2023

When we use electroless nickel plating solution for production, because most of the reducing agents used are hypophosphite, phosphite ions will inevitably be generated in the plating solution.owever, when the concentration of phosphite is high, it will affect the deposition rate of chemical nickel. What range should the concentration of phosphite in the bath be controlled?

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The passivation film of colored zinc workpiece is not red. Try this color zinc passivator

The passivation film of colored zinc workpiece is not red. Try this color zinc passivator

Fri Jan 06 09:36:40 CST 2023

In the process of galvanizing production, after color passivation of galvanized workpieces in some factories, the color of passivation film is always not red enough. What should we do? Try this color zinc passivator.

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There are three reasons why the galvanized workpiece with potassium chloride zinc plating additive looks too colorful after color passivation

There are three reasons why the galvanized workpiece with potassium chloride zinc plating additive looks too colorful after color passivation

Thu Jan 05 09:21:01 CST 2023

In the zinc plating production process using potassium chloride zinc plating additive, sometimes after the workpiece is color passivated, the appearance becomes too colorful. What causes this?

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It is very important to control the temperature of plating solution when using electroless nickel plating solution for production

It is very important to control the temperature of plating solution when using electroless nickel plating solution for production

Wed Jan 04 09:44:32 CST 2023

We need to strictly control the temperature of plating solution in the production process of using electroless nickel plating solution.Even if a temperature controller is installed, it is necessary to regularly determine whether the temperature of the plating solution is within the process range.

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Six factors influencing the quality of nickel coating when using barrel nickel plating brightener

Six factors influencing the quality of nickel coating when using barrel nickel plating brightener

Tue Jan 03 09:32:17 CST 2023

In the process of using barrel nickel plating brightener, sometimes the coating of the workpiece will be black and foggy, which seriously affects the quality of the coating.So what factors will affect the quality of the coating?

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Imported tin plating additives are expensive and large in use. Try this sulfate tin plating additive

Imported tin plating additives are expensive and large in use. Try this sulfate tin plating additive

Mon Jan 02 13:49:58 CST 2023

Many people think that it is better to use imported tin plating additives in the production process of tin plating.However, due to the high price of imported additives and the high production cost, we can actually consider choosing domestic sulfate tin plating additives with stable performance to try.

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During the production process of using nickel plating brightener, pay attention to check the rectifier when the coating adhesion is poor

During the production process of using nickel plating brightener, pay attention to check the rectifier when the coating adhesion is poor

Tue Dec 27 10:22:05 CST 2022

In the production process of using nickel plating brightener, sometimes the adhesion of the nickel plating layer is poor and easy to peel, which may not be a problem of the plating solution. It is also necessary to check the rectifier, because the failure of the rectifier will also affect the adhesion of the nickel plating layer.

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The reason why the workpiece coating is easy to peel when using electroless nickel plating solution for production

The reason why the workpiece coating is easy to peel when using electroless nickel plating solution for production

Mon Dec 26 09:18:53 CST 2022

In the process of using electroless nickel plating solution, sometimes the coating surface of the workpiece will peel, which will seriously affect the appearance and performance of the workpiece. What causes this phenomenon?

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How long is the service cycle of electroless nickel plating solution? Choosing the right product is critical!

How long is the service cycle of electroless nickel plating solution? Choosing the right product is critical!

Sat Dec 24 09:06:00 CST 2022

When many customers choose the electroless nickel plating solution, they will be more concerned about the service life of this electroless nickel plating solution?In fact, it is crucial to choose the right product!

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Three reasons for pitting when the work-piece faces upward when using electroless nickel plating solution

Three reasons for pitting when the work-piece faces upward when using electroless nickel plating solution

Fri Dec 23 09:59:27 CST 2022

In the production process of using electroless nickel plating solution, sometimes the workpiece always has pits on the upward side. What is the reason?

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Color zinc workpiece passivation slow color, poor corrosion resistance, you can try this trivalent chromium color zinc passivator

Color zinc workpiece passivation slow color, poor corrosion resistance, you can try this trivalent chromium color zinc passivator

Wed Dec 21 08:55:09 CST 2022

Color zinc passivator is used, but the coloring of the workpiece is slow during passivation, and the corrosion resistance of the workpiece after passivation is poor, which will seriously affect the production efficiency. You can try this trivalent chromium color zinc passivator with good performance.

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Treatment method for white fog phenomenon of nickel coating during nickel plating additive production

Treatment method for white fog phenomenon of nickel coating during nickel plating additive production

Tue Dec 20 09:22:33 CST 2022

A customer enquired that white fog is easy to appear on the coating of the hole edge or low current area of the workpiece during the production process using nickel plating additives. What is the reason for this?

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Treatment method for chloride ion pollution in plating solution during chromium plating additive production

Treatment method for chloride ion pollution in plating solution during chromium plating additive production

Mon Dec 19 11:47:54 CST 2022

A customer inquired that during the use of chromium plating additives, some workpieces will bring nickel plating solution or cleaning water containing high concentration of chloride ions into the plating solution due to incomplete deplating in hydrochloric acid, resulting in fogging and blooming of workpieces.So how should the chromium plating solution deal with chloride ions?

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When using electroless nickel plating solution production, the plating bath deep plating ability is poor should pay attention to these three points

When using electroless nickel plating solution production, the plating bath deep plating ability is poor should pay attention to these three points

Sat Dec 17 09:02:28 CST 2022

When we use electroless nickel plating solution, in theory, the workpiece as long as immersed in the plating solution at any position can obtain uniform coating.In the production process, the workpiece in the hole, slot, slot and other positions can not get good coating, mostly to deep hole, blind hole or through hole.

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The nickel plating layer of carborundum mold has poor brightness and is not wear-resistant. You may try this nickel plating additive

The nickel plating layer of carborundum mold has poor brightness and is not wear-resistant. You may try this nickel plating additive

Fri Dec 16 09:38:39 CST 2022

Mr. Peng from Guangzhou is the boss of a nickel plating factory.Recently, in the process of nickel plating, Mr. Peng found that the nickel plating layer of several customers' carborundum molds had poor brightness and no wear-resisting phenomenon, which seriously affected the appearance quality and function of these molds.So Mr. Peng is eager to find a nickel plating additive with excellent performance.

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When nickel sulfamate additive is used,solution to misfeeding bright nickel additives into plating solution

When nickel sulfamate additive is used,solution to misfeeding bright nickel additives into plating solution

Thu Dec 15 17:17:07 CST 2022

One customer, in the process of using nickel sulfamate additive, the operator accidentally added bright nickel additive to the nickel sulfamate plating solution, resulting in a very brittle workpiece coating.How to solve this problem?

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There are 6 factors that affect the weldability of the plating when electroless nickel plating solution is used

There are 6 factors that affect the weldability of the plating when electroless nickel plating solution is used

Wed Dec 14 10:37:13 CST 2022

In the process of using electroless nickel plating solution, some products of electroless nickel coating need to have good dispersibility and weldability, and can be welded for many times and be compatible with various fluxes.However, the solderability of some products is poor. What factors will affect the solderability of electroless nickel coating?

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When using nickel plating additives for production, pay attention to this point when the coating is rough and has burrs!

When using nickel plating additives for production, pay attention to this point when the coating is rough and has burrs!

Tue Dec 13 11:25:05 CST 2022

In the production process of using nickel plating additives, sometimes the workpiece coating appears rough and burrs.Even if the plating solution is treated with impurities, this will happen again soon, which is very troublesome.What causes this phenomenon?

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The tin plating stability of the contactor workpiece is poor, and the welding performance of the coating is poor. Try this bright tin plating additive

The tin plating stability of the contactor workpiece is poor, and the welding performance of the coating is poor. Try this bright tin plating additive

Mon Dec 12 11:14:17 CST 2022

Sometimes, the bath is very unstable during the tin plating process, which will seriously affect the performance and quality of the workpiece coating.At this time, we should try a new tin plating additive.

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Four reasons for poor coating dispersion of workpieces in the production of acid copper plating brightener

Four reasons for poor coating dispersion of workpieces in the production of acid copper plating brightener

Sat Dec 10 09:32:33 CST 2022

In the production process of using acid copper plating brightener, sometimes the dispersion performance of workpiece coating is poor, and the thickness difference between high and low areas is large. What causes this?

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When nickel plating additives are used for production, the method of adding additives

When nickel plating additives are used for production, the method of adding additives

Fri Dec 09 08:53:53 CST 2022

In the production process of using nickel plating additives, we can correctly add additives to ensure that the produced workpieces can meet the requirements in appearance and performance.So how should we add additives correctly?

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The reason of stripe on the coating in the high current area of the workpiece when using alkaline zinc nickel alloy plating additive for production

The reason of stripe on the coating in the high current area of the workpiece when using alkaline zinc nickel alloy plating additive for production

Thu Dec 08 09:13:53 CST 2022

When we use alkaline zinc nickel alloy plating additive for production, sometimes the coating in the high current area of the workpiece has stripes, which will seriously affect the appearance and performance of the coating. So, how can this phenomenon occur?

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The stability of acid zinc plating solution is poor, and the passive film is easy to fall off,try this acid zinc plating additive

The stability of acid zinc plating solution is poor, and the passive film is easy to fall off,try this acid zinc plating additive

Wed Dec 07 09:45:34 CST 2022

Recently, Mr. Xie found the acid zinc plating additive used in the production process, and the stability of the plating solution is relatively poor. When the workpiece is passivated with color zinc, the adhesion of the coating is poor and the film is easy to fall off.This leads to poor production efficiency and high production costs.Therefore, Mr. Xie is eager to change a better acid zinc plating additive.

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Four reasons for the poor dispersion of the coating in the production of acid copper plating brightener

Four reasons for the poor dispersion of the coating in the production of acid copper plating brightener

Tue Dec 06 13:43:10 CST 2022

In the production process of using acid copper plating brightener, the dispersion ability of workpiece coating is relatively poor, and the thickness difference between high and low areas is relatively large. What causes this?

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Inaccurate dosing method of electroless nickel plating solution will lead to unstable plating solution

Inaccurate dosing method of electroless nickel plating solution will lead to unstable plating solution

Mon Dec 05 11:25:41 CST 2022

In the production process of using electroless nickel plating solution, the addition of solution should be standardized.If the adding method is not accurate, which is likely to lead to instability of the plating solution, what should be paid attention to when adding the solution?

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Six factors affecting the weldability of electroless nickel plating solution

Six factors affecting the weldability of electroless nickel plating solution

Sat Dec 03 08:56:47 CST 2022

In the production process of using electroless nickel plating solution, sometimes the welding performance of the coating is poor. What is the reason?

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After the workpiece is plated with nickel, the coating is easy to crack,try this nickel plating additive

After the workpiece is plated with nickel, the coating is easy to crack,try this nickel plating additive

Fri Dec 02 08:59:04 CST 2022

Recently, When using nickel plating additive, Mr. Qin found that the thickness of nickel plating layer of the plated workpiece was 5μm. When riveting, the nickel layer will crack, which seriously affects the performance of the workpiece.However, Mr. Qin checked the production processes, concentration of plating solution components and operating parameters, which were normal.What is the problem?

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The effect of high metal impurity content in plating solution on workpiece coating when decorative chromium plating additive is used for production

The effect of high metal impurity content in plating solution on workpiece coating when decorative chromium plating additive is used for production

Thu Dec 01 09:07:38 CST 2022

In the process of using decorative chromium plating additives, there will be iron, copper, zinc, lead and other metal impurities in the plating solution, which will affect the performance of the workpiece coating.So what are these metal impurities from?

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The reason and treatment of concave spots in workpiece coating during the production process of using nickel plating additives

The reason and treatment of concave spots in workpiece coating during the production process of using nickel plating additives

Wed Nov 30 08:56:54 CST 2022

In the process of using nickel plating additive, the workpiece coating is prone to the phenomenon of concave points, which has a great impact on the appearance of the workpiece.What causes this phenomenon?

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Reasons for black spots in passivation film of workpiece during production with zinc plating color passivator

Reasons for black spots in passivation film of workpiece during production with zinc plating color passivator

Tue Nov 29 09:23:49 CST 2022

When we use the zinc plating color passivator, the passivation film of the workpiece will appear black spots. Is this due to the influence of metal impurities?

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The brightness of the tinning layer of the workpiece is poor and easy to fade,try this methanesulfonic acid tin plating additive

The brightness of the tinning layer of the workpiece is poor and easy to fade,try this methanesulfonic acid tin plating additive

Mon Nov 28 09:28:26 CST 2022

Recently, Mr. Weng found that the brightness of the workpiece coating was poor during the process of using the tin plating additive, and there was color fading during placement, which would increase the resistance of the coating and affect the performance of the workpiece.So Mr. Weng wants to find a tin plating additive with good brightness and no fading.

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Seven operation points of plating solution management and control when using electroless nickel plating solution for production

Seven operation points of plating solution management and control when using electroless nickel plating solution for production

Sat Nov 26 09:35:40 CST 2022

In the process of using electroless nickel plating solution, the workpiece can obtain uniform coating thickness, and can also flexibly control the coating thickness. At the same time, the workpiece can effectively increase wear resistance, corrosion resistance and hardness.In the production process, what are the operating points to ensure the stability of the plating solution, prolong the service life and reduce the occurrence of failures?

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Three reasons for heat treatment of workpieces in the production process of using electroless nickel plating solution

Three reasons for heat treatment of workpieces in the production process of using electroless nickel plating solution

Fri Nov 25 09:26:19 CST 2022

In the production process of using electroless nickel plating solution, the workpiece needs to go through a heat treatment process. What's the role of this?

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In the production of acid copper plating brightener, pay attention to these four points when the consumption of brightener is large

In the production of acid copper plating brightener, pay attention to these four points when the consumption of brightener is large

Thu Nov 24 11:41:23 CST 2022

In the production process of bright copper electroplating, we can quickly obtain good brightness, filling and displacement ability by adding acid copper plating brightener normally.Sometimes we find that the consumption of brightener is much higher than usual. What is the reason?

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When the electromagnetic shielding performance of the electroless nickel coating on the workpiece is poor, try this high phosphorus electroless nickel plating additive

When the electromagnetic shielding performance of the electroless nickel coating on the workpiece is poor, try this high phosphorus electroless nickel plating additive

Wed Nov 23 09:54:32 CST 2022

Mr. Fang received a connector for aircraft, and the workpiece coating needs 20 μm thickness.However, after electroless nickel plating on the workpiece, the coating is brittle and magnetic, which does not meet the customer's requirements.The additive supplier still has such problems after treating the bath for many times, so Mr. Fang wants to find a high phosphorus electroless nickel plating additive that meets the customer's requirements.

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Four reasons for the poor brightness of workpiece coating when using decorative chromium plating additives

Four reasons for the poor brightness of workpiece coating when using decorative chromium plating additives

Tue Nov 22 10:46:11 CST 2022

When we use decorative chromium plating additives, the workpiece can obtain a bright chromium plating layer with good coverage.Sometimes the brightness of the chrome plating layer on the workpiece is very poor. What is the reason?

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Reasons for workpiece coating getting black and gray after large treatment of plating solution in production with potassium chloride zinc plating brightener

Reasons for workpiece coating getting black and gray after large treatment of plating solution in production with potassium chloride zinc plating brightener

Mon Nov 21 11:17:33 CST 2022

In the production process of the potassium chloride zinc plating brightener we used, after the plating solution is heavily treated, the workpiece coating is prone to appear black and gray, and the Hull cell test coupon is also gray,and after adding brightener, the coating will be bright. What is the reason?

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When using acid copper plating brightener for production, pay attention to the following three points

When using acid copper plating brightener for production, pay attention to the following three points

Sat Nov 19 09:45:47 CST 2022

Using acid copper plating brightener, mirror bright coating can be obtained on the surface of the workpiece, and the coating has good filling and corrosion resistance.Sometimes the filling and leveling performance of the products produced is poor. What is the reason?

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When the coating of tin plated electronic components is easy to thin in the low current area, try this methanesulfonic acid tin plating additive

When the coating of tin plated electronic components is easy to thin in the low current area, try this methanesulfonic acid tin plating additive

Fri Nov 18 09:27:46 CST 2022

Mr. Xiong found that the dispersion of the workpiece coating was relatively poor when using tin plating additives. The tin coating in the low current area was thin, which affected the weldability of the workpiece.So Mr. Xiong wants to find a good dispersion of methanesulfonic acid tin plating additive.

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In the process of using organic acid matt tin additive, these six points should be noted before production

In the process of using organic acid matt tin additive, these six points should be noted before production

Thu Nov 17 08:59:18 CST 2022

In the process of using organic acid matt tin additive, what matters should we pay attention to in production in order to ensure the smoothness and uniformity of the workpiece coating and superior solderability?

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A method to reduce the content of trivalent chromium in plating solution when chromium plating additive is used

A method to reduce the content of trivalent chromium in plating solution when chromium plating additive is used

Wed Nov 16 10:37:52 CST 2022

In the process of using chromium plating additives, sometimes the content of trivalent chromium in the plating solution will increase, resulting in the workpiece coating rough, dark, poor brightness and other problems.So how do we reduce the content of trivalent chromium in the bath?

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Reasons for workpiece blackening at the hook when using alkaline zinc nickel alloy additive for production

Reasons for workpiece blackening at the hook when using alkaline zinc nickel alloy additive for production

Tue Nov 15 11:50:06 CST 2022

In the production process of using alkaline zinc nickel alloy additive, the workpiece will be blackened at the hook, which will seriously affect the appearance quality of the workpiece.So, what causes this phenomenon?

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The tin plating layer of the workpiece is easy to turn blue and yellow. Try this methanesulfonic acid tin plating brightener

The tin plating layer of the workpiece is easy to turn blue and yellow. Try this methanesulfonic acid tin plating brightener

Mon Nov 14 11:02:32 CST 2022

Mr. Xu of Tianjin has opened a new production line of methanesulfonic acid type tin plating, which is ready for precise electronic product tin plating processing and production.According to a friend, Mr. Xu used a tin plating brightener, and the workpiece coating was prone to appear blue and yellow, which seriously affected the performance and service life of the workpiece.So Mr. Xu wants to find a better performance methanesulfonic acid tin plating brightener.

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Does the USB plug-in need a lot of current when plated with matte tin? Try this matte tin additive

Does the USB plug-in need a lot of current when plated with matte tin? Try this matte tin additive

Thu Aug 25 10:22:53 CST 2022

During this time, Mr. Hu used a matte tin additive introduced by a friend, but the production requires a large current density (other process parameters are normal), and the coating of the workpiece is relatively rough, loose, and brittle.This seriously affects the performance requirements of this USB plug-in.

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