Black zinc passivation solution

Black passivator without hexavalent chromium,suitable for rack plating and barrel plating. Used together with a sealer,it can produce a dense black passivation layer on the acid zinc chloride coating. When used with a sealant,the anti-white rust time of 5% salt spray test is ≧72 hours. Excellent anti-impurity performance. The bath has a long service life. Easy to operate and maintain. In barrel plating or automatic wire passivation,the scratches caused by collision or friction will be automatically repaired.

Send Inquiry


Product Description

Product name: Trivalent chromium black zinc passivator Packing specification: 25kg/barrel
Product appearance: dark green liquid Smell: mild
Specific gravity: 1.20-1.28 Solubility in water: all dissolved
Storage method: ventilated and dry place Shelf life: 2 years

Instructions for use

BZ-217 trivalent chromium black zinc passivating agent

180-220 ml/L




20-60 seconds

PH value



Mechanical stirring or air stirring


60-80℃ for 10-25 minutes

Product features



Free of hexavalent

chromium, free of

silver and other

harmful metals

Green products, passed SGS product

testing and certification, comply with

ROHS, ELV regulations, suitable for

export orders in Europe and America.





Obtain a deep black

uniform passivation


The film is dense and strong, with good anti-collision and anti-scratch ability;

suitable for auto parts products with

hardness and wear resistance



Excellent corrosion


The nano-sealing agent is added to the

product, which has good anti-rust ability.

When the thickness of the zinc layer is 5-8

microns, it can resist NSS ≥ 72 hours,

which can meet the functional

requirements of the upper-grade

hardware products.





High tolerance of


The tolerance of metal impurities in the passivation working fluid is high,zinc > 7 g,

Iron > 100 mg,which can reduce the time

of shutdown and the loss of passivation agent,saving costs.


Low consumption and


Source manufacturer,concentrated type,

durable and affordable.





Single component

passivating agent,

easy to operate and


Single cylinder opening and replenishment,

easy to use,easy to manage,save worry

and effort.

Scope of application

About us

Qualification strength

R & D strength

Cooperation brand


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.

Product Tag

Related Products

Send Inquiry

Should you have any enquiries, please kindly fill in the Enquiry Form below . We will reply you within 24 hours.