Can 316L stainless steel be etched using 98% oxalic acid by simple dipping?

01 January 2019 1 7K Report

The goal is to increase the surface roughness of 316L stainless steel fibers to improve the results of coating by sol gel process.

A lot of sources suggest etching in boiling acid mixture containing oxalic acid, hydrochloric acid and sulphuric acid or electrochemical etching in 90% oxalic acid solution. These techniques require quite a lot of preparation and they are rather dangerous.

Is it possible to etch 316L stainless steel in 98% oxalic acid by dipping without applying heat or voltage?

Ali Tozar

You cannot obtain a desired much rough surface without anodization.

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