Home /
T.O.C.
FAQs
 
Good
Books
Ref.
Libr.
Advertise
Here
Help
Wanted
Current
Q&A's
Search 🔍
the Site

World's #1 finishing resource since 1989
No login needed: Chime right in

topic 8628

Chromate Conversion Hazard?



2001

Is the chromate conversion (Alodine/alocrom) FINISH of al.alloy, (not the application process), at all hazardous if not painted?

David Wibrow
- Gloucester, UK


2001

That's an excellent question to which I've never seen an authoritative response, only conjecture. So I'll add my conjecture!

There are some problems that are too complex to solve. If you snip a maple leaf off a high branch of a tree on a still day, all of the world's computers can't tell you whether it will land North, South, East, or West of where it hung, because of the unfathomable complexity of the aerodynamics.

Hexavalent chromium is considered carcinogenic in the U.S.A.; but the relationship between cancer and even fairly severe industrial exposure to hexavalent chromium seems limited and difficult to prove or disprove. So I suspect that to demonstrate that very occasional skin exposure to a dried gel of hexavalent chromium a few millionths of an inch thick is carcinogenic would probably take an astronomical, utterly impractical sample size and control sample size, such that maybe there simply is no current authoritative answer no matter how hard we look.

But if anybody has accumulated any data on this, or is an epidemiologist or epistemologist we'd love it if they'd chime in.

Ted Mooney, finishing.com Teds signature
Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey

none
finishing.com is made possible by ...
this text gets replaced with bannerText
spacer gets replaced with bannerImages

Q, A, or Comment on THIS thread SEARCH for Threads about ... My Topic Not Found: Start 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:

 
Jobshops
Capital
Equipment
Chemicals &
Consumables
Consult'g, Train'g
& Software


About/Contact    -    Privacy Policy    -    ©1995-2021 finishing.com, Pine Beach, New Jersey, USA