aluminium fim-formation additive

LW-19 chromium-free passivation additive is a kind of colorless transparent and environmental protection additive. It applies the composite 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 chromium-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.

LW-15 Film-formation Additive is a kind of brownish liquid which can form a bright yellowish film on the surface of aluminum and aluminum alloy. This film has excellent corrosion resistance and good adhesion with coating and plastic coating.

LW-150 Film-formation Additive is a kind of green liquid which is capable to form a colorless or light blue film on the surface of aluminum and aluminum alloy. This film has excellent anti-corrosive resistance and adhesion with coating.