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

Chime right in! (no registration req'd)

-----

"ALODINE vs. IRIDITE"



2000

Q. What is Alodine and how does it differ from Iridite (conversion coating for Aluminum)

Would appreciate your reply.

We are a plating and metal finishing firm in London Ontario Canada and have encountered this question numerous times and have not been able to find a definitive answer.

ROBERT WENDT
plating and metal finishing - London, Ont. Canada
^


2000

A. Hi Robert. Chromate conversion coating of aluminum -- sometimes called chem-filming in the USA -- is most frequently done to mil spec Mil-DTL-5541 [link is to free spec at Defense Logistics Agency, dla.mil]

To comply with that Mil-spec, however, requires that you use tested and recognized chemicals listed on 'qualified products list' QPL-81706 [affil. link to spec at Techstreet]

Alodine is a tradename used by Henckel for their chromate conversion processes, and Iridite is a tradename of Macdermid for their chromate conversion processes. But both have a number of variations listed on that QPL: liquid vs. dry, clear vs. colored, no-rinse formulas, etc., so it's not quite a Pepsi vs. Coke situation but more like a Ford line of trucks vs. Chevy line of trucks.

Is one REALLY different than the other, or BETTER than the other? Well, is a Chevy really better than a Ford? Clearly, each company salespeople would claim so, and there are even people who do not have an axe to grind who feel that one is better than the other in some way or other.

But if I were running a shop would I put in both? No. Rather, I would tell my customers that the one I used was a fully qualified, top of the line, MIL-DTL-5541 conversion coating process.

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



Is anyone purchasing CLEAR IRIDITED parts from CHINA ?

2007 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread

Q. Has any one purchased aluminum products with clear Iridite from China ?
Seems to me some of the contacts that I have in China do not know what is Clear Iridite.
Is there a different term for this finish?

Jack O. Ewe
Designer - New York, US
^


2007

A. Hello, Jack. Please see my previous response for a detailed explanation.
Iridite is a Macdermid trademark, so one option would be to contact Macdermid and see if they can tell you what shops offer their finish in China.
A second option would be to look for it by the more generic spec, MIL-DTL-5541 chromate conversion coating.
A third option would be to appreciate that knowledge is invaluable, and to work with a local domestic shop so you can have a reasonable expectation of satisfactory processing without misunderstandings.
Good luck whatever way you go.

Regards,

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



August 5, 2008 -- this entry appended to this thread by editor in lieu of spawning a duplicative thread

Q. I would like to know what is the difference between Alodine and Iridite?

Linda Lo
buyer - San Jose, California
^


August 6, 2008

A. Hi, Linda. As you see, some questions are perennial; we appended your inquiry to a thread that answers it. Good luck.

Regards,

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



April 28, 2012

Q. Dear Sir
Can anybody send me TDS AND MILL TEST CERTIFICATE OF ALODINE NR 6012, MADE BY HENKEL?

FAYYAZ AHMED [returning]
- Punjab, Pakistan
^


April 29, 2012

A. Hi Fayyaz.

I can tell you that NR 6012 is a hexavalent no-rinse chromate conversion coating for use on strip lines. But you would need to contact Henkel for certifications. I could be in error, but I believe that certifications must follow a link from the purchase, i.e., that you cannot copy someone else's certifications. Good luck.

Regards,

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


May 3, 2012

Q. Dear Ted Mooney, P.E. RET
Can you please send me more detail and literature for NR 6012.

Regards,

FAYYAZ AHMED [returning]
- Punjab, Pakistan
^


May 3, 2012

A. Hi cousin Fayyaz.

Sorry, but I have no such info. You need to contact Henkel for whatever you can't find on the web about Alodine NR 6012 because it is their proprietary product.

Regards,

Ted Mooney, finishing.com
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