finishing.com -- The Home Page of the Finishing Industry
Serious Education & the most FUN
you can have in metal finishing smiley

No popups, spam, registration or passwords
HomeFAQsSuggested
Books
Help
Wanteds
Advertise
on this site
FORUM
current topics
topic 2303

Failure testing of nickel plating


1998

I would like to test the integrity of a nickel plating (IAW Mil-C-26074 [linked by editor to free spec at Defense Logistics Agency, dla.mil]E CLASS 2, .0015 MIN THICKNESS) on a part. Please tell me what the MOST harmful environment is for the plating. I need to know what will cause the plating to flake off, wear down, or be destroyed in some other way.

Vince Vendetti
Naval Surface Warfare Center - Dahlgren VA


Flaking off occurs as the result of poor adhesion from improper surface preparation; this is probably best tested with a thermal stress cycle, most importantly, just heating the item to a substantial temperature. Wear can be tested with a Taber Abrasion tester.

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


1998

Vinc,

Ted's suggestions are sound- and since MIL-C-26074 has been discontinued and the suggested replacement (AMS2404 [link by ed. to spec at TechStreet]) is really intended for the automotive industry and is less demanding in terms of physical requirements, you must choose your testing based on the intended service conditions. We employ a bend test of coupons using a 1/2" mandril. Also, since our parts are subsequently soldered in a vapor phase, we subject the parts (100%) to a vapor phase test (the thermal shock Ted mentioned) to check for blistering. In lieu of Taber abrasion resistance, you could also consider a microhardness test. For corrosive environments, think about CASS or salt spray testing as well.

Good luck.
Keith

Keith Wicklund, CEF-SE
avionics - Minneapolis, Minnesota



If you have a question in mind which seems off topic, please 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 finishing.com, Inc., Pine Beach, NJ   -   About finishing.com   -  Privacy Policy
How Google uses data when you visit this site.