Summary for stripping nickel electroplate Discussion
Stripping nickel electroplate from Kovar is the topic, but the provided thread excerpt is too limited to capture any actual troubleshooting details or conclusions. The visible text only shows the start of a post (“adv.”) and does not include the question, replies, or named advice. Because no substantive discussion is present in the excerpt, there is no reliable way to summarize the process, recommended stripper chemistry, or any cautions specific to Kovar without inventing facts.
adv.
Q. How to strip sulfamate nickel from kovar base metal.
Rudy taracena
– South gate, California
February 1, 2022
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We are a captive plating shop that electroplates sulfamate nickel followed by high-purity gold (99.9+ %, < 90 knoop hardness) over a Kovar substrate. When we are required to rework parts, we have great difficulty stripping nickel off the Kovar substrate without etching the base kovar material (29% Ni, 17% Co, 54% Fe). Because of the configuration of our parts and plating process, our nickel plating thicknesses can range from 50 micro-inches in the lowest-current-density areas to 150 micro-inches in the high-current-density areas. Does anyone know of a stripping solution for stripping the nickel plating without etching this base material? The parts also contain glass hermetic seals so fluoride must be avoided.
Thanks,
Steven Carsberg
plating shop – Phoenix, Arizona
2004