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Ferroxyl test on Electroless Nickel plating

I work as a QA Engineer, recently our customer required us to perform Ferroxyl test or Aerated water test as per ASTM B733 standard on Electroless Nickel plating stamped part. I am running out of time for the FA submission, can anyone please provide the test method and specification?

Peggy Yeap
- Penang, Malaysia

Hello Peggy!

The ferroxyl test, for iron based substrates only, is noted in paragraph 9.6.1 of ASTM B733, so I'm not sure I understand your question. The aerated water test is found in paragraph 9.6.3, and requires water per ASTM D1193. ASTM documents are available at the ASTM website for immediate download (for a price, of course).

The ferroxyl test is further detailed in paragraph 7.3.4 of ASTM A380 , "Cleaning and Descaling Stainless Steel Parts, Equipment, and Systems". A modified ferroxyl test is described in ASTM B689, "Electroplated Engineering Nickel Coatings".

Good luck!

Lee Gearhart
metallurgist - E. Aurora, New York

We are carrying out feroxyl test for some of our machined components. If you are interested we can share the information. I am not sure whether its applicable for stamped components.

Ganesh
- Mysore, India

June 19, 2008

Hello
Where can we find this product to do a test? We don't find it in Belgium
Regards,

Marc JORIS
- Liège, Belgium

Hi;

Need further advice on this test method being a specification used to determine porosity corrosion in our products. Our parts are having a base substrate of C12L14 which is a form of free cutting steel. We cannot find a solution to constant failures from this test results where Blue spots and streaks are detected. Is the base material not suitable for EN or is the EN process to be refined?

Arthur Lau
Program Manager - Singapore
October 12, 2008

That is a lot of lead in your part. EN will work, BUT it will require a fluoboric acid activation step to remove the surface lead. You could use hydrofluoric acid, but that is one nasty acid. Nothing else will work for consistent quality plating.
You have to make your own ferroxyl test material as it is an acidified ferrocyanide product. This is a very very sensitive test. Will copper sulphate ⇦this on eBay or Amazon [affil links] test work?

James Watts
- Navarre, Florida
October 14, 2008

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