finishing.com -- The Home Page of the Finishing Industry
A website for Serious Education, promoting Aloha,
& the most FUN smiley you can have in metal finishing

HomeFAQsBooksHelpWantedAdvertiseForum
(current
topics)
topic 8906

Safety Aspects of Chromate Layer


(2001)

Can you please advise what is the current knowledge on the Occupational Health and safety aspects of the chromate layer of the chromate conversion treatment of Aluminium?

S Chong
- Sydney. Australia


(2007)

Can you please advise what is the current knowledge on the Occupational Health and safety aspects of the chromate layer of the chromate conversion treatment of Aluminium?

Ramesh Kumar.V.k
Engineer - Kerala, India


(2007)

There is a problem with this question that explains why it has remained unanswered, Ramesh, despite being seen by thousands of readers, and simply repeating the question doesn't solve the problem :-)

Simply, it is a better topic for a research paper, than for the short answers that suit a forum. But many governments consider hexavalent chromate to be carcinogenic, and that a chromate conversion coated piece of aluminum therefore has a carcinogenic coating on it. As a minimum, operators should wear gloves when handling. Viable trivalent chromate conversion coatings now exist that meet Mil-DTL-5541 [link is to free spec at Defense Logistics Agency, dla.mil]. Please explain your situation. Thanks.

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


(2007)

Thanks so much Mr.Ted Mooney. I would like to explain the situation. Our organisation manufactures a large number of aluminium products for space launch vehicle applications.It includes chassis for electronic packages, components required for integrating various electronic packages/systems to the structure of the launch vehicle/ sub-assemblies.These products are either anodised/yellow chromated. Wherever electrical conductivity is to be maintained, yellow chromating using Alodine 1200 is being done. The chromate treated components are handled by employees without gloves during inspection, further integration operations and transportation.This practice is being practised for the last 20 or 30 years.Our government has not banned chromating. Whether the persons handling the chromated components are also at risk? Kindly advise.

Ramesh Kumar.V.K
- Trivandrum, Kerala, India


(2007)

Unfortunately, hazards are always relative, never yes/no, and there is no direct answer to your question, Ramesh. Chromate is not so hazardous that we can point to clear imminent injury, but neither has anyone proven its safety by orchestrating extensive repeatable tests where some employees touch chromated parts every day for years and others never touch such parts for years :-)

Instead, think in terms of the new Mil-DTL-5541 [link is to free spec at Defense Logistics Agency, dla.mil] approved TCP chromates that contain no hexavalent chrome. If that is not appropriate, then I urge you again to consider gloves. Many of us consultants to the industry can't even count the installations that we are familiar with where people once insisted they couldn't possibly wear gloves but now do without considering it a burden.

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



This public forum has 60,000 threads. If you have a question in mind which seems off topic to this thread, you might prefer to Search the Site

ADD a Q or A 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


©1995-2017 finishing.com     -    Privacy Policy
How Google uses data when you visit this site.