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topic 9833

Sulfur Content in Nickel Plating


Does anybody know an easy way to determine the Sulfur content of semi-bright a SAE-AMS-QQ-N-290 [link by ed. to spec at TechStreet] Nickel deposit after a part has been plated (destructively or otherwise)? I am trying to determine the maximum allowable amount of Sulfur in the plating that can still be laser welded to form a hermetic seal. This would be for several different substrate types including 306L SST, 6061 Al, Kovar, Ti, etc... I know that Sulfur content is important for multilayer nickel plating, can I apply something from multilayer plating methods to my situation?

Alan Davis
- Wenatchee, Washington, USA


I have analyzed the S contents in electroplated Ni alloy by EPMA and Elemental Analyzer(CHNS). I think it was satisfactory. The S contents was about 0.1 wt%.

Sang Hyun Jeon
- Osan, Korea


I would think that your best bet is to plate a foil, being careful to maintain the same current density and plating parameters, then get the foil assayed for sulphur. Our lab uses a Leco low sulphur analyser to determine the sulphur level in nickel.

Don Piett
Inco Ltd - Thompson, Manitoba, Canada



We have our Sulfamate nickel bath analyzed monthly for "P". The method that works for us is EDX. I'm assuming you could do the same for "S". The report out will have a graph of your deposit.

Good Luck,

Mark Kruzel
MMP - El Cajon, California

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