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Can hard chrome plating survive 7-stage phosphatizing?


Q. Dear all,

We have a steel tube weldment (e-bike frame) which includes a hard chrome plated hollow pin (hollow turned rod). It has a plunger sliding in it, which is also hard chrome plated.

We manage to weld the chrome plated part to the steel frame. The frame is further powder coated.

My question is: Whether this hard chrome plated hollow pin will sustain 7 tank phosphating process or not?

ASHISH MOHAN SHARMA
- Chennai, India
December 29, 2018


A. Hi Ashish. I highly doubt that exposed hard chrome can properly survive 7-stage phosphatizing. I think it needs to be flawlessly masked.

Regards,

ted_yosem
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
Ted is available for instant help
or longer-term assistance.
December 2018


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