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Letter 16078
Tin plate of 12L14
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I am having a problem with pitting of 12L14 after tin plating.
Stephen Gallen
- Glenolden, PA, USA
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OK- Are you Telling the world you have a pitting problem or do you
have a Question. More information is required if you have a question,
like what is the exact question??? with details!
James Watts
- Navarre, Florida
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Stephen, 12L14 is a free machining steel- it has controlled
amounts of 'dirt' in the steel to aid machining, in that the chips
break easier. This 'dirt' will likely give you fits should you want
to put a pit-free thin coating on the part. Make sure your coater
knows the material- perhaps they can do some additional preparation
or put on a thicker coating.
Good luck!
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Lee Gearhart
metallurgist
East Aurora, NY
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12LXX is a "leaded steel" and little flakes of lead can be seen on
the surface with a magnifying glass. Lead forms insoluble salts with
sulfates, chlorides and many other acids, however, lead does not form
an insoluble with Fluoboric Acid, therefore skip the sulfate acid
salts, skip the sulfuric acid, skip the Hydrochloric acid and run
your parts through 30%/vol Fluoboric Acid before plating.
Dear Reader, please --
- Post a
question on a different subject.
-
- Answer or follow-up on this subject (in non-commercial
fashion).
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