Even today chromate finishes including zinc chromate provide superior corrosion resistance.
Clear zinc chromate.
Our zinc and chromate finishes are rohs compatible.
However the coating color can also be changed with dyes so color is not a complete indicator of the process used.
Clear chromate withstands 16 24 hours in neutral salt spray while yellow withstands 96 hours.
The protective effect of chromate coatings on zinc is indicated by color progressing from clear blue to yellow gold olive drab and black.
Darker coatings generally provide more corrosion resistance.
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.
The deposit is a pleasing finish in itself however it is also an excellent base for paint.
Zinc plating in general can be broken into two primary steps.
The first step is to add the zinc plating through the use of electrical current.
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It is used industrially in chromate conversion coatings having been developed by the ford motor company in the 1920s.
What is clear zinc plating.
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.