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topic 0988

Stripping Zinc-Nickel Plating / Coating

An ongoing discussion from 1998 through 2015 . . .


Q. How do you strip zinc-nickel coating from steel and from copper based alloys.

Robert Kestler
- Cherry Point, North Carolina


A. Contact Patclin Chemical Co. They have exactly what you need.


Dave Kinghorn
Dave Kinghorn
Chemical Engineer
SUNNYvale, California




Steve Cornwell
supporting advertiser
Chicago, Illinois


Strip zinc-nickel plating from Aluminum Bronze

June 5, 2015

Q. Does anybody have information How to strip Zinc/nickel alloy plating from Aluminium Bronze substrate?
I have found stripping Zn/Ni from steel can easily be accomplished by immersion in dilute HCl; however this method is unsuitable for stripping from Al/Br as it's likely to attack the base metal.

Thanks in advance.


Russ Davies
Aerospace finishing supplier - Stroud, UK

Stripping of Zinc Nickel coating from brass substrate

June 11, 2015

Q. Hello everyone,
We have recently started to produce zinc nickel coatings on steels and brass. We are experiencing problems stripping the zinc nickel coating of brass substrates. We use a 50 hydrochloride acid bath to strip the the zinc of steel followed by Enstrip S to remove the nickel smut left after the hydrochloric dip. As mentioned the stripping of the zinc nickel of brass is proving very difficult resulting in quite a few parts being scrapped off. We use the hydrochloric dip to strip the zinc but are confused as to how to remove the nickel smut. (The Enstrip S is excellent on steels but cannot be used on brass substrates). We also copper strike the brass before zinc nickel but are also finding it difficult to rework.

Do you think the copper strike is really needed on brass. Is there a suitable strip solution to strip zinc nickel of brass substrates.

Would really appreciate any comments or answers on our problem. Thank You.

Nigel Bell
Process Technician - Crumlin. County Antrim. Northern Ireland.

July 26, 2015

A. Re: the nickel smut on brass, could be worth trying a peroxide based brass chemical polishing process.

Geoffrey Whitelaw
Geoffrey Whitelaw
- Port Melbourne, Australia

March 1, 2016 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread

Q. May I know how to remove Zn-Ni plating from steel material that is already plated/coated? We need to remove it because we need to paint it. Thank you.

Steve Key
-Jakarta, Indonesia

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