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Nickel sulphate bath pores

October 20, 2008

We have 1400 Lt Nickel sulphate bath. We couldn't attain smooth surfaces while cover plating. Surfaces have pore and holes after operation. Also rising cover plating is hardened and fragile. How do we operate to overcome this problem and to reach perfect surface as a result.

As operation; We apply 3 ampere electricity on dm2(decimeter square) with PH4 and heat is 45°C."

Best Regards,

Rahmi Özkarayel
Machine / Automation - Istanbul, Turkey

Sounds like a filtration or contamination problem. Nickel sulphate baths are not common and mostly used for specialty jobs requiring conforming anodes. Since there are no chlorides in the chemistry, nickel anodes will not dissolve properly and must not be used. What are you using for anodes? Are you controlling the particles that erode away from them? What additives do you use? Are you dummying frequently?

Guillermo Marrufo
Monterrey, NL, Mexico
October 22, 2008

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