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Current position:Index-Product-LP-Z309 Cold aluminum blackening agent

LP-Z309 Cold aluminum blackening agent

2018/07/06

This product is an alkaline mixture, which does not contain harmful substances such as heavy metals. It is easy to use and environmentally friendly. It can quickly form a black film with excellent adhesion and pure and durable color on the surface of aluminum and aluminum alloy. It can be widely used. Used for surface blackening of zipper, aluminum laser coding, auto parts, etc.


Technical parameters

Use raw solution, temperature 20-30 degrees, time 0.5-2 minutes

Process flow: degreasing of workpiece ---- washing ---- alkali corrosion (10% sodium hydroxide) for 1-2 minutes ---- washing ---- nitric acid (10-30) exposure for 0.5 minutes --- washing --- Washing ---- Blackening agent (0.5-2 minutes) --- Washing ---- Washing


Note: 

1 The temperature does not exceed 35 degrees.
2 After the nitric acid has been exposed to light, it should be drained as much as possible.
3 Darkening time should not be too long.

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