Sound technical content, curated with aloha by
Ted Mooney, P.E. RET
Pine Beach, NJ

finishing.com -- The Home Page of the Finishing Industry

The authoritative public forum
for Metal Finishing since 1989
-----

Chrome conversion coating to stop galling?

Would a chrome conversion coating on aluminium help prevent galling/cold welding between an aluminium thread and mild steel? We are in the construction industry and have approximately 18 000 large parts so commercial anti-seize compounds are not practical. The threads are tightened, left under load and then loosened about 3 weeks later. Grease makes a small difference but is not solving the problem.

Andrew Farrow
consulting - Johanessburg, South Africa
2006

If grease does not help, I think that your aluminum threads are distorting under the load rather than galling.

James Watts
- Navarre, Florida
2006

(No "dead threads" here! If this page isn't currently on the Hotline your Q, A, or Comment will restore it)

Q, A, or Comment on THIS thread -or- Start a NEW Thread

Disclaimer: It's not possible to fully 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 might be harmful.

If you are seeking a product or service related to metal finishing, please check these Directories: