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I have a part made of chromium. The part was plated with nickel. How can I dissolve nickel coat from that part?

I knew that nickel could be dissolved in hydrochloric, sulfuric, and dilute nitric acid. But chromium has same properties of dissolution in the same acids. Is there a way to remove the nickel coat without harm to the chromium-made part?

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    $\begingroup$ I am afraid chemical ways would have lack of selectivity and the only way is non chemical, e.g. combination of mechanical (peeling off?) and thermal ( different dilation stress?) methods, which may or may not be applicable. Perhaps @blacksmith37 as the respected expert could have some insight here. // Generally, is not it quite unusual, chrome being plated by nickel ? As chrome is like always the top layer. $\endgroup$
    – Poutnik
    Nov 10 '21 at 8:28
  • $\begingroup$ @Poutnik thank you for fast replay. Yes, it's unusual composition of metals. I have chrome plated with nickel. Usually is nickel plated with chrome. $\endgroup$ Nov 10 '21 at 11:25
  • $\begingroup$ It seems unlikely that a chemical method will work. Given that pure chromium is very hard and nickel is softer, maybe sandblasting would do the job. Good luck with this! $\endgroup$
    – Ed V
    Nov 10 '21 at 17:05
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You do not have a part made of chromium. Maybe Vitalium, a chromium cobalt alloy used for dental protheses, gas turbine blades and other stuff under different names like Stellite. It would be very, very unusual for Vitalium to be nickel plated

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  • $\begingroup$ For reference, Vitallium is an alloy of 65% cobalt, 30% chromium, 5% molybdenum, and other substances (but 0% left, so probably some very minor components) // See also Stellite $\endgroup$
    – Poutnik
    Nov 11 '21 at 9:06
  • $\begingroup$ I meant Stellite 21, but could not remember the number; very similar to Vitallium. $\endgroup$ Nov 12 '21 at 17:31
  • $\begingroup$ No 21 is mentioned on the Wikipedia page.. See also specialmetals.ir: stellite 21.pdf $\endgroup$
    – Poutnik
    Nov 12 '21 at 17:33

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