Which etchant is used for Nickel Calcium (5 -6.5%) alloy?

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V R Arun Prakash

you can go with concentrated HCl or H2SO4

Dr. Pallavi Deshmukh

V R Arun Prakash , how much % of HCl or H2SO4 Sir?

better go for 4N

Actually i used this for leaching stainless steel and aluminium 6061. Copper is soft only compare tan these two so surely it will workout on it.

best

arunprakash vincent