Zinc Clear Chromate

Citation needed the protective effect of chromate coatings on zinc is indicated by color progressing from clear blue to yellow gold olive drab and black.

Zinc clear chromate.

Steel components are often zinc plated for corrosion resistance and sacrificial cathodic protection. Zinc trivalent dichromate plating provides a similar finish to the hexavalent finish with the added benefit of rohs compliance. I believe it is astm b201 80 affil. Zinc plate with clear chromate per astm b633 affil.

The deposit is a pleasing finish in itself however it is also an excellent base for paint. It is used industrially in chromate conversion coatings having been developed by the ford motor company in the 1920s. Zinc dichromate remains a superior chromate for primer applications. Tommy garza quality technician austin texas usa.

These solutions are referred to as chromates hex chrome or passivates tri chrome. Is there any research on a comparison of zinc plating with different chromates. Type ii refers to a colored yellow olive drab chromate. The second step is to treat the plated metal with a chemical passivate which adds color.

The first step is to add the zinc plating through the use of electrical current. 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. Link to spec at techstreet type 3 sc 2 sheet is crs 1010 1020 060 thick. Link to spec at techstreet that states you should get at least 24 hrs to white corrosion from a single dip clear blue brite chromate in a salt spray cabinet.

What is clear zinc plating. Yellow or clear zinc chromate coatings. Dichromates were originally used as primers for paint until their natural appeal was realized. Yellow chromate should get 96 hrs to failure.

Yellow and clear sometimes called white essentially perform the same function as a superior corrosion inhibitor for your metal parts. Will you supply us with a statement on letterhead stating that the clear zinc chromate will have equal or greater salt spray resistance as the yellow zinc chromate. Zinc plating in general can be broken into two primary steps. In general please give me your thoughts on yzp vs clear zinc i really appreciate you taking the time to help us out.

Our zinc and chromate finishes are rohs compatible. 60 000 q a topics education aloha fun topic 2233 clear vs. This is a major project that we are undertaking. The chromate coating acts as paint does protecting the zinc from white corrosion thus making the part considerably more durable depending on the chromate layer s thickness.

Zinc dichromate plating provides additional protection for corrosion vs. Type iii refers to a clear blue brite chromate passivate.