Degreasing alkali corrosion agent

an alkaline compound specially designed for cleaning and biting aluminum. It provides a good biting surface for subsequent polishing, anode or chrome coating processes.

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Product Description

Degreasing alkali corrosion agent

BC-20 Alkaline Aluminum Microetching Agent

Description :

   BC-20 is an alkaline compound specially designed for cleaning and biting aluminum. It provides a good biting surface for subsequent polishing, anode or chrome coating processes.

   BC-20 has four obvious signs: 1 ) the largest bite; 2 ) not too many bubbles; 3 ) no alkaline spray; 4 ) no sludge or residue accumulation.


Features and advantages :


   1. Low foam

   1. During the biting process, there is no lye spray, so the operating conditions are good;

   1. Eliminates irregular biting or leakage caused by oil stains or local obstruction of the film;

   1. Uniform and good biting effect, with quality assurance;

   1. There is no silt deposit on the bottom or wall of the tank, and the maintenance cost is low;

   1. Quickly and completely remove oil stains, simple circulation, low-cost operation;

   1. Provides ideal undercutting for decorative aluminum .


Physical and chemical properties:



   BC-20 is a balanced alkaline etching agent that can provide uniform and good bite corrosion in the shortest time.

   Cleaning ability

   Although BC-20 has a good ability to remove oil stains, pre-cleaning is necessary in most cases to ensure uniform biting. The amount of etched metal can be controlled by operating conditions such as temperature, time, and concentration.

   In order to ensure uniform biting, the temperature, time and concentration must be constant.

   Foam characteristics

   The foam produced during the biting process disappears soon after the workpiece leaves the solution.


Operating conditions :




   15-120 g/L





   50-93 ° C




   30 ~3 minutes or longer





   Steel tank and heater


Cycle process :

   1.BC -19

   1. Wash in cold water


   1. Cold wash

   1. Remove oxide or dirt

   1. Cold wash

   1. Drying , chemical polishing , electrolytic polishing , electroplating or anodizing treatment.


Analysis steps :



   BC-20 analysis method

   Analysis of aluminum etchant             

   (A) 1. Use a pipette to transfer 10 mls of cold BC-20 to a 250 ml conical flask;             

   2.   Add about 50 mls of pure water and 3-5 drops of phenolphthalein indicating agent;

   3.   Titrate with 0.5N HCI until the pink color disappears;

   4.   Record the number of ml consumed by 0.5N HCI titration .

   (B) 1. Add 30 mls of 10% KF solution. If the pink color no longer appears , there is undissolved aluminum in the bath . Use calculation method 2 .             

   2. If the pink color appears, reset the burette to zero and titrate with 0.5N HCI until the pink color disappears.             

   3.   Repeat steps B 1 and B 2 ( without zeroing ).  If the pink color does not appear within 30 seconds, no further titration is required. If pink appears, continue titrating. Record the 0.5N HCI ml consumed in step B titration .

   Calculation :

   1. BC-20 concentration (oz/gal) = ( ml number in step A titration x 0.42)-( ml number in step B titration x 0.15)  

   1. Dissolved aluminum (g/L) = the number of ml titrated in step B x 0.45

   1. Sodium aluminate (oz/gal) = dissolved aluminum (oz/gal) x 3.04  



1. Q: Do you make the products yourself? Are you a trader or a manufacturer?

A: Yes, the products are produced by our company. Our company is a manufacturer focusing on the R&D and manufacturing of environmental protection electroplating additives. Our factory has 5000 square meters with an annual capacity of 15000 tons.

2. Q: Can your company send samples for trial?

A: We can provide samples for trial.

3. Q: What is the quality of your products?

A: Our company all products core raw materials is used by Germany BASF, American Dow Chemical and other international brand products. The production process is strictly in accordance with the ISO9001 quality management system, from the incoming inspection, product inspection, according to the strict inspection standard, ensure that every drop of products qualified. Product quality you can rest assured, like BYD, Huawei, Foxconn such enterprises are also using our products.

4. Q: How long is the shelf life of your products?

A: The shelf life of our products is two years. If you do not use up the products within a short time after you buy them, we suggest you store them in a cool place, not in the sun or in a high temperature environment.

5. Q: Are your products environmentally safe?

A: Our products have passed the SGS test and are recognized as "Green and Environment-friendly Promotion Products". Many auto parts and electronic products which use our products can pass the strict environmental protection test when they are exported to Europe and America. Therefore, we can be trusted in terms of environmental protection and safety.

6. Q: Can your company provide technical services?

A: Yes, our company has a technical service team of more than 10 people. The technical engineers all have more than 20 years' experience in electroplating factory. They can provide customers with comprehensive technical of pre-sales and after sales.

7. Q: Is it possible to visit your company?

A: Yes, of course. You are very welcome! We can meet you at Jieyang airport, If you can come to our city. Also you can visit our factory through live video.

8. Q: Can you customize products according to our needs?

A: Yes, our company has research and development strength, the product formula derived from Europe and the United States laboratory, European and American engineers technical support, work together with domestic universities. Our company has a member of Guangdong province expert enterprise workstation, Shantou university science and technology correspondent workstation, Jieyang city environmental protection engineering research center for electroplating additive.Therefore, it can meet all kinds of customized requirements proposed by customers.

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