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LW-19 chromium-free passivation additive is a kind of colorless transparent and environmental protection additive. It applies the composite metal salts to form the uniform chemical conversion film on aluminum surface which can effectively enhance the coating film adhesion and corrosion resistance to the surface and the coating. LW-19 is heavy metals- free and in line with the green environmental protection requirements, can completely replace the traditional chromium passivation coating for aluminum surface treatment, it can also be used to spray or immersion.

Features:

1) Environmental protection: LW-19 is a kind of chromium-free and no heavy metals, non-toxic, no health hazards acidic liquid additive;

2) Simple: Simple process, wide control range, convenient control, only need to control the bath solution PH value of 2.8-3.8;

3) Energy-saving: Operation at room temperature, bath make-up applies running water, no need to worry about the inconveniences caused by application of pure water;

4) Performance: Bath solution is stable and the coating film is of no color (transparent), it is also applicable for crystalphoresis pretreatment.

LW-19 Chromium-free 

Passivation Additive                     



LW-19 Chromium-free Passivation

Additive is a kind of colorless transparent and environmental protection additive. It applies the composite metal salts to form the uniform chemical conversion film on aluminum surface which can effectively enhance the coating film adhesion and corrosion resistance to the surface and the coating. 

Features:
1) Environmental protection: LW-19 is a kind of chromium-free, non-toxic and no heavy metals additive;
2) Simple: Simple process, wide control range;
3) Energy-saving: Operation at room temperature, bath make-up can apply running water;
4) Performance: Bath solution is stable and the coating film is of no color (transparent), it is also applicable for crystalphoresis pretreatment.

Waste water treatment： 
LW-19 chromium-free passivation additive is a washable chromium-free passivation product, which does not contain chromium or any other heavy metals. Thus, before discharging the waste water of degresing bath and chromium-free passivation bath, can apply quick lime and sodium hydroxide to neutralize the waste water PH to be 6.5-7.5 is ok. Specific discharge standards should be according to national laws and regulations and local government discharge standards.

LW-14 Chromium-free 

Degreasing Additive

LW-14 Chromium-free Degreasing Additive is a kind of colorless to yellowish transparent liquid with powerful degreasing surface active agent, emulsifier and functional agent.This product can efficiently remove aluminum surface grease, stains and natural oxidation film and results no harm to aluminum profiles. LW-14 is used for pre-treatment of aluminum profiles powder coating and anodization. It has advantages of low cost, little aluminum consumption and energy-saving comparing to alkaline etching treatment..