-- The Home Page of the Finishing Industry
23+ years of serious education, promoting Aloha,
& the most fun you can have in metal finishing smiley
    no popups, no spam
on this site
current topics
topic 10824



There are 2 small contacts - one a Ni plated steel and the other Galvanic Ni plated SS. It becomes insulating after a period of usuage of the product. After wiping the surface with an organic solvent, it starts functioning for again a definite period of time.What may be the reason? Ni plating is non porous.

Nagalakshmi Thogulava
- Noida, Uttar Pradesh, India


The study of electrical contact surfaces is perhaps a bit broad to cover in a paragraph here, but nickel tarnishes and is suitable for medium voltages but not really low voltages. Look at the contacts on your computer, cell phone, etc.: note that for non-critical battery contacts, nickel usually suffices but that the contacts for digital information exchange are gold plated. What kind of signal are you trying to carry?

Ted Mooney, Teds signature
Ted Mooney, P.E.
Pine Beach, New Jersey


Is it possible to selectively gold plate on a small Ni plated area (1mm x 5 mm) surface for providing good contacts as well as prevent corrosion? Compoent cannot be exposed to more than 45 deg centigrade.

Nagalakshmi Thogulava
- India



Thanks a lot for your response.The contacts are carrying a 3V, 1.2 microampere signal from a 3V button cell. Do you think Ni plating can carry this signal without oxidising? Also, I have seen some parts of the positive contacts having porosity in the Ni plating. These parts didn't have this problem when it was chemical Ni plated.

Nagalakshmi Thogulava
- India

This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Comment to THIS thread START a NEW threadView CURRENT TOPICS

Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2018, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.