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 11002

Alodine electrical conductivity issue


 

I understand that Alodine is electrically conducted coating, which does not affect grounding. Is it true?

Lev J. Balanovsky
- Feasterville, Pennsylvania, USA


 

Yes, a thin coat to Mil-C-5541class 3 is often used in grounding areas. See AMS C5541 [withdrawn / link is to spec at TechStreet] and there are some numbers for this.

Martin Trigg-Hogarth
Martin Trigg-Hogarth
surface treatment shop - Stroud, Glos, England


 

Calling the chromate conversions "electrically conductive" is really a misnomer. The Class 3 coatings are so thin that when put under pressure, they short through and those shorts conduct, the coating is not in itself conductive.

The variables involved are both the thickness of the coating, and the surface finish of both mating surfaces. If you had a highly polished pair of surfaces, it would be difficult at best to cause the necessary "punctures" through the surface thus allowing electrical conductivity. Conversely, extremely rough finishes would allow conductivity with very little pressure.

Bob Denney
avionics Tampa, Florida


2006

Hello,

I am trying to find value (number) for relative conductivity of Alodined aluminum.

Andrey Gleener
- Port Moody, BC, Canada



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.