Summary for motorcycle forks rust Discussion
Motorcycle forks rust after grinding is the core issue in this thread, with Dinesh Kumar asking why fork pipes rust on the outer diameter during rainy days after grinding and why the inner diameter rusts after nickel-chrome plating. The reply says the problem likely needs a larger process review rather than a small tweak, because more detail is needed before a precise fix can be given. For the outer surface, the answer notes that flash rusting after grinding may not matter much if the parts are plated immediately. For the inner diameter, the answerer says he has seen rusting of chrome-plated tubing’s I.D. significantly reduced by in-line phosphatizing after chrome plating. The overall advice is to examine the full sequence and timing of operations, especially how quickly parts move from grinding to plating and whether post-plating phosphatizing is being used.
Q. Dear all,
We are front forks making company. During rainy days fork pipe outer dia. getting rusty after grinding, and inner dia. also getting rusty after nickel-chrome plating. So please share your valuable experience with me.
Thanks & regards,
Dinesh kumar
– Chennai,tamilnadu, India
A. Hi Dinesh. Obviously, such problems will require a major effort to correct, not a tiny tweak, so you would need to commit significant effort to telling us exactly what is going on before anyone can offer detailed help. But …
– Flash rusting after grinding may not be a significant issue if the parts will be plated immediately.
– I have seen rusting of the I.D. of chrome plated tubing significantly deterred by in-line phosphatizing after the chrome plating. Good luck.
Regards,
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com – Pine Beach, New Jersey
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July 2015