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Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

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Electroless Nickel Plating over Electrolytic Nickel Plating

Q. I own a Plating shop.
One of my customer requires 70 to 80 micron Electroless Nickel Plating (Medium phosphorous). The purpose of ENP to achieve better corrosion resistance. ENP is costly in India.
If I do 50 Micron Electrolytic Nickel Plating from Sulphamate Bath & do 30 micron ENP over it in same line to reduce cost. Can I get same corrosion protection which ENP gives.

Prasad Patwardhan
- Ahmadnagar India
July 2, 2024

A. Hi Prasad,
70-80 microns (0.003") is a very thick coating; even 30 microns is quite substantial.

If this is done with your customer's acknowledgement, and both of you are sure that there is no wear requirement, and you can keep the electrolytic nickel active or re-activate it, it sounds quite doable to me.
Luck & Regards,

ted_yosem
Ted Mooney, P.E. RET
Striving to live Aloha
finishing.com - Pine Beach, New Jersey

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