Passivation of Stainless Steel 202 6

[amracson]

I would like to as if it is possible to passivate grade 202 of stainless steel without affecting its surface (corrosion to nitric acid) or affecting its dimension.

Thank you.

Sonny B. Nogot
Mechanical Engineer
Philippines

 

[Robertmet]

You might like to read the comments in the link as far as non-standard 202. Poor quality 202 may be very different.

 

[EdStainless]

Warm 15% nitric acid should have no impact on the surface. If it does the material was crap to begin with.

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Plymouth Tube

 

[amracson]

Thank you Robertmet and EdStainless for your answers to my inquiry. I have asked because I was looking for a cannulated drill bit (3.20 mm x 1.70 mm) and a particular supplier informed me that their drill bits are made out of grade 202 stainless steel. We normally use 17-4 PH and 304 grade and our passivation process employs more than 40% nitric acid solution. Again, Thank you.