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Can zinc phosphate coating lead to Liquid Metal Embrittlement above 800F?  

June 3, 2009

Zinc plating has lead to LME of austenitic stainless steel and even ferritic steels above 800 F. Can a zinc phosphate coating lead to LME of steel or 4140 HSLA steel bolts? Does anybody have any case histories or articles that prove it will or will not lead to a problem with Liquid Metal Embrittlement?

Tom Laundrie
End User in Petrochemical Industry - Seadrift, Texas, USA
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