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coloring

There are mainly electrolytic coloring and chemical coloring. Chemical coloring is dipping after anodic oxidation of aluminum alloy in a solution containing the dye, due to the adsorption of porous oxide film layer, dye molecules into pore and color, so the chemical coloring also called chemical staining. The dyeing film of chemical stain is not as good as electrolytic color, it is used only for the color processing of aluminum extrusions in the interior.

Aluminum mainly USES the electrolytic coloring, therefore, the method is in the solution containing metal ions, through the effect of current, metal ions, reduction of generated metal (or metal oxide) deposit in the bottom of the oxide film, due to the scattering effect of sediment in light colors.

Tin salt, tin-nickel salt electrolysis champagne color, black

The original electrolytic tinting is tin salt, tin-nickel salt electrolytic champagne color, black, its process is shown in table 1. In general, the same tin or tin nickel salt electrolytic coloring trough, mixed by changing the voltage or coloring time, can get - including champagne bronze, brown, tan, black, and a series of by the shallow and deep color (commonly known as the bronze color). The tin-nickel mixed salt system is more likely to get true black than the single tin salt system.

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