Gary:
Almost independent of environment, a chromated zinc plate will be somewhat better than a clear zinc, and MUCH better than a phosphate. (Of course, I speak pre-ROHS data, I cannot comment on ROHS compliant "chromates".)
Rudy Sedlak
RD Chemical Company
--- On Thu, 4/23/09, Gary Camac <[log in to unmask]> wrote:
From: Gary Camac <[log in to unmask]>
Subject: [TN] Plating on screws
To: [log in to unmask]
Date: Thursday, April 23, 2009, 6:09 AM
Which finish would provide better corrosion resistance - Zinc (clear or
chromate) or Black phosphate?
TIA
Gary Camac
Senior Manufacturing Engineer
DICKEY-john Corp.
5200 Dickey John Road
Auburn, IL 62616-0010
Telephone 217-438-2288
[log in to unmask]
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