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How to remove surface defects from type 409 Stainless Steel?

2007

Dear sir,
We have a problem where we have ss 409 and ss 304 stretched operated metal, but it has patches somewhere yellowish and bright colour it not looks non-aesthetic -- so what to do? If I want pickling, then how to do?.

Thanking you,

Gaurav Srivastava
filtration - Jaipur , Rajsathan , India

I'm not sure ,but you could try this:
cathode-electrolyzing with low current in hexavalent chrome bath.

Frank Liou
Seagull - Guangzhou, China
2007

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