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