Darker coatings generally provide more corrosion resistance.
Clear zinc chromate.
Additionally zinc chromate is highly toxic thus protecting the surface from proliferation of organic matter.
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 plating essentially does mean colorless or transparent and is essentially a color choice which shows the natural metallic color of the zinc coating.
Zinc plating in general can be broken into two primary steps.
However the coating color can also be changed with dyes so color is not a complete indicator of the process used.
Our zinc and chromate finishes are rohs compatible.
Clear chromate withstands 16 24 hours in neutral salt spray while yellow withstands 96 hours.
Even today chromate finishes including zinc chromate provide superior corrosion resistance.
Zinc chromate is a corrosion resistant agent that is added to certain coatings.
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.
It is used industrially in chromate conversion coatings having been developed by the ford motor company in the 1920s.
The protective effect of chromate coatings on zinc is indicated by color progressing from clear blue to yellow gold olive drab and black.
The deposit is a pleasing finish in itself however it is also an excellent base for paint.