日韩欧美三级片在线,久久99精品国产.久久久久,2020国产成人综合网,99国产精品久久久久久久久久久,中国免费高清在线观看_久久国产精品免费无码二区_日本一级黄片视频_日国产av自拍_妈妈用嘴巴帮我消火

Zinc blackening agent,Zinc alloy blackening agent,Zinc black passivating agent,Black zinc passivating agent

Zinc blackening agent,Zinc alloy blackening agent,Zinc black passivating agent,Black zinc passivating 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)

④Immediately after washing the galvanized parts into the environmental protection chromium-free black zinc passivation agent  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.

Other processing：、Environmental degreer and rust remover、Copper colored chocolate、Electroless plating of real gold on copper surface、Strong oil stain removal agent、Copper、chromium and nickel stripping agent、Metal coloring agent、The copper surface is chemically coated with black metal film、Copper colored chocolate