Clear Zinc Chromate

Zinc chromate zn cr o 4 is a chemical compound containing the chromate anion appearing as odorless yellow powder or yellow green crystals but when used for coatings pigments are often added.

Clear zinc chromate.

Zinc plating in general can be broken into two primary steps. The protective effect of chromate coatings on zinc is indicated by color progressing from clear blue to yellow gold olive drab and black. However the coating color can also be changed with dyes so color is not a complete indicator of the process used. It is used industrially in chromate conversion coatings having been developed by the ford motor company in the 1920s.

The deposit is a pleasing finish in itself however it is also an excellent base for paint. Yellow or clear zinc chromate coatings yellow and clear sometimes called white essentially perform the same function as a superior corrosion inhibitor for your metal parts. Additionally zinc chromate is highly toxic thus protecting the surface from proliferation of organic matter. Clear zinc plating essentially does mean colorless or transparent and is essentially a color choice which shows the natural metallic color of the zinc coating.

Even today chromate finishes including zinc chromate provide superior corrosion resistance. The first step is to add the zinc plating through the use of electrical current. Clear chromate withstands 16 24 hours in neutral salt spray while yellow withstands 96 hours.

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