The authoritative public forum
  for Metal Finishing 1989-2025
  

  -----

Iridite finish spec for aluminum

My company has inherited a design including aluminum parts which are specified to be finished according to "IRIDITE 14-2". The shop that is now making the parts doesn't recognize this spec, and I have been unable to find it on the web or in any of the reference books I looked at.

Can someone enlighten me as to what this spec is?

Thomas McCarty
- Lake Forest, California, USA
2001

---

First of two simultaneous responses

Iridite is a Macdermid trade name for chromate conversion coatings, Thomas. Note that it has a single 'r', which is probably why you had difficulty with your search.

Ted Mooney, P.E.
Striving to live Aloha
finishing.com - Pine Beach, New Jersey
2001

---

Second of two simultaneous responses

Tom,

14-2 is not a spec it is a product, originally from Allied Kelite. It is a gold chromate on Aluminum. The spec is MIL-C-5541. And 14-2 meets it . There are non-chrome substitutes for 14-2 such as Sanchem 3500.

Drew Nosti, CEF
Anodize USA

Ladson, South Carolina

2001

---

Iridite 14-2 is a trade name for a chem film process like Alodine 1200. What you could do is to change the spec to AMSC5541 class 1A (replaced Mil-C-5541 class 1A). This will get you from a trade name to an internationally recognised standard. Martin Trigg-Hogarth surface treatment shop - Stroud, Glos, England 2001 Iridite 14-2 is a product. There are many products used for chromate conversion aka chem film aka chemical conversion coatings. Iridite 14-2 is just one of many products used to produce these coatings. This happens to be the product we use here. David A. Kraft - Long Island City, New York 2001