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
-----

Chromate conversion (Alodine 1200)

2003

For corrosion protection of an aluminium part of a helicopter our customer is requesting chromate conversion of aluminium alloys using Alodine 1200.

I would like to have a detailed description of this process since we are not familiar with it.

I would also like to know if there is any restriction to use this process due to its carcinogenic potential.

Thanks for your time.

Patrik Ugarte
- Las Arenas, SPAIN

The product you named is the proprietary name for an aluminum chromate conversion coating that meets USA MIL C 5541f, yes it is carcinogenic, and the rinse water effluent has to be treated and the sludge dumped in an "approved" waste dump.Alternate finishes are in demand but so far nothing approaches the protection offered by aluminum chromate. Europe (EU) has almost completely banned any chromate conversion coatings. Several other proprietary products are readily available across the globe.

Robert H Probert
Robert H Probert Technical Services

Garner, North Carolina

2003

(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: