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Etching solution for nickel-iron

We are looking for a nickel-iron etching solution. We are currently processing the parts with muriatic acid but are having problems with corrosion after a few hours.

Carmen Ma. Rosa
electroplating shop - Bayamon, Puerto Rico
1999

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Are you etching nickel-iron to roughen up the profile of the surface? What process follows the etch? Do you mean that the etching solution fails after a few hours of use, or that the parts corrode after a few hours in the solution?

If the problem is the former, how many square meters of work is processed per liter of solution before the problem occurs?

Best regards, Tom

  
Tom Pullizzi
Falls Township, Pennsylvania
1999

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Hi, Sirs:

I have similar problem of etching Ni-Fe, but it's permalloy. Do any body can give any suggestion about the etching solution? Actually, I am dealing with the combination of hydrochloride and nitric acid. Thank you so much. Harrison

Harrison Chang
UC-Irvine - Irvine, California
2000

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2003

Hi,

I want to etch nickel based alloy but I can't find an appropriate etching agent. I have used nital, and also used acid ferric chloride but neither of them has worked. So if you please inform me with the best etching agent that would be appropriate for the nickel alloy.

Yours sincerely,

Aboamar Almagriby
- UK

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June 14, 2009

you can try nitric acid 1: 3 where 1 is nitric and 3 is water ,
should buy nitric acid 40% (commercial)
temperature 38 degree
am assuming you are using dual jet etching machine for cutting Iron
Regards
Ajay

Ajay Wadhwa
- Delhi, India

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Sir/madam
can anybody suggest me the best etchant for Ni alloys specially for Ni-690 and Ni-693.
many etchants are available in the ASTM metallography book. Non of them are specific to one alloy.
yours
Pradeep

Pradeep Samantaroy
research scholar - Chennai, India
September 3, 2009