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topic 11140

Hydrogen Embrittlement and Electroless Nickel


After plating a carburzied steel with electroless nickel, how many hours can the hyrdorgen embrittlement bake be delayed?

Daniel Bemenderfer
- Indianapolis, Indiana

First of two simultaneous responses 2001

How long after the onset of infection should you delay the administration of antibiotics?

24 hours is absolutely too long. 12 hours is definitely too long. 4 hours is becoming the new "standard". Some specs are beginning to call for one hour maximum. The right answer is to look towards tomorrow and accept that the parts should go directly from the plating line to the oven.

Ted Mooney, Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey

Second of two simultaneous responses 2001

There are various retention times depending on the specification you are conforming to. I have seen 4 hours and 8 hours. I reccommend trying to get them to the oven as soon as possible. The longer the retention time is delayed, the longer the atomic hydrogen has to migrate into the substrate.

Best of Luck.

Ira Donovan, M.S.F.
Kansas City, Missouri

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