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I have been asked to deposit hard chrome (.000050-.0001) over an electroless nickel surface (.015-.020) which has been post baked
@400F (returned to the mfg.) then diamond turned. It must be a
"clear" (no discoloration/cloudiness) coating... Any ideas outside of a cathodic, sulphuric activation?
- Frankfort, Illinois
Since you are going to plate in Cr you could activate the part in the chrome solution by applying just enough current to give the part a hydrogen wash but not enough current to plate any Cr. After the wash just ramp up the current to plate.
Atotech - Rock Hill, South Carolina
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