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non-hexavalent chrome coatings

non-hexavalent chrome coatings

non-hexavalent chrome coatings

(OP)
does anyone know where i can find a ranking of the costs of the non- hexavalent chrome coatings that are used for fasteners. I found this very helpful posting with a table of the coatings ranked by corrosion resistance, but not cost. thread332-189454: Zinc Plating. can I assume that the least effective are the cheapest?

RE: non-hexavalent chrome coatings

Call them and ask.

RE: non-hexavalent chrome coatings

Yes, you can assume that the least effective are the least expensive.

The lowest performance on that chart is a simple zinc phosphate, with a relative cost of 1.

DELTATONE / DORRELTECH B17 14 ยต would have a relative cost of 6.

Geomet is 7.

Zinc platings with TRIVALENT chromate conversion coatings have relative cost > 10.

So, the high-performing zinc-flake coatings are less expensive than the lower-performing zinc platings.  Food for thought.

Regards,

Cory

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