Metal blackening agents Zinc blackening agent Zinc electroless blackening process

Environmental protection chromium-free black zinc passivation agent (zinc blackening agent)

First, the product code: Q / YS.504 (Yi Shun brand)

Second, product advantages:

The product is free of trivalent chromium and hexavalent chromium. The zinc passivation film is dense and shiny, more corrosion resistant than traditional hexavalent chromium. It is stable in use, simple in operation and clean in working environment. Near-neutral products, the skin is almost no stimulation, non-toxic environmental protection, corrosion-resistant film with strong binding, neutral salt spray test 300 hours or more.

Third, the product scope:

Widely used in zinc plating and zinc alloy passivation, passivation film was bright black, suitable for hanging plating, barrel plating, screws, auto parts and other motorcycle the most urgent designated project.

Fourth, product index:

Product appearance:

① colorless, tasteless, transparent liquid

② proportion: 1.02 ~ 1.03

③ PH value: 5.0 ~ 6.0 (partial neutral)

Five, use method:

① After adding 1 times tap water into the working fluid.

② The working fluid heated to 80 ℃ ~ 90 ℃, you can use.

③ The galvanized workpiece immersed in 3% nitric acid for 3 seconds, the workpiece light. (The best use of the company dedicated light agent, does not hurt the zinc layer)

④ immediately after washing the galvanized parts into the black zinc passivation for 3-5 minutes, the passivation film was shiny black.

⑤ closed film: immersed in blocking agent for 2 minutes and then washed.

⑥ Wash the workpiece after drying clean, 50 ℃ drying half an hour.

Our services

Order Guangzhou YiShun Chemical Company's products, you will have the following technical support: 1, selection of professional engineers. 2, phone detailed understanding.3, video demo. 4, live demonstrations. 5, site service.6, special technology R & D and preparation. 7, continue to follow the sale.