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Hydrogen deembrittlement



(-----) February 10, 2008

Dear Sirs,
I am madhu a job coater. Can anybody suggests what is the Deembrittlement tempaerature we have to adopt for acid pickled or plated parts (Medium carbon steels).
Any literature discussing 48 hour at room temeperatute is sufficient? Pl, clarify.

S.Madhu
Zinc & Zinc alloy plating

Madhu Sudeendran
Zinc & Zinc alloy plating - Chennai,Tamil Nadu & India
^


February 12, 2008

There are many letters on line here that will give you the temperature. Madhu: 350-400 F. I have never heard of room temperature de-embittlement and suspect that it's a dangerous fantasy.

Ted Mooney, finishing.com
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
^


February 14, 2008

Good afternoon:

There might be some confusion between zinc electroplating and zinc phosphate. There are a couple standards that discuss 48 hour hold after zinc phosphate to reduce the risk of hydrogen embrittlement, but they do not cover electroplating.

Steve Bizub
- St Louis, Missouri
^

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