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  for Metal Finishing since 1989
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Pitting in high phosphorous E/N plating in S.S 410 Material

2005

Dear Sir,
I am a Technical Manager working in an Indian Based co.
During the E/N Plating Process using High Phos. 11% E/N Solution, I encounter pitting problem when we plate a thickness of about 60 Microns on S.S 410 material.With air agitation I am able to reduce the pitting to an appreciable extent.Can you suggest a suitable solution to completely arrest it.What precautions are to be taken. The same E/N Solution doesn't cause pitting in low carbon steel.Pleaser clarify.

Rajendran Krishan
Tech Services for surface fin. Industry - Tamilnadu, India

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2005

If the carbon steel really is not pitting and the 410SS is, then there is something different about the 410SS.

Is the 410SS part a casting? Is it masked with something organic? Is its pretreatment different?

Find the difference and you will probably find the problem.

Ron Duncan [deceased]
- LaVergne, Tennessee
It is our sad duty to note Ron's passing on Dec. 15, 2006. A brief obituary opens Episode 13 of our Podcast.