What is aluminum chromate?

What is aluminum chromate?

Aluminum chromating – also known as chemical films or by the trade names Alodine® and Iridite® – is a conversion coating primarily used to passivate the surface of an aluminum component. The part surface is converted to the chromate through a chemical reaction.

Why do you alodine aluminum?

Chem film or Alodine is a chemical conversion coating that’s mostly used to protect aluminum from corrosion. It’s primarily used to passivate aluminum as it protects this metal and serves as a base for paint coatings. It leaves aluminum unaffected, so it’s easier to put paint over it without changing anything.

What does Iridite mean?

Iridite is a N.C.P. (non-chrome chemical process) that produces a protective chromate conversion film coating on aluminium and its alloys. The process is RoHS and WEEE compliant. It is often used as a protective coating for abraded anodized surfaces and to provide an electrical contact.

What color is chromate?

yellow
Zinc chromate, ZnCrO4, is a chemical compound containing the chromate anion, appearing as odorless yellow powder or yellow-green crystals, but, when used for coatings, pigments are often added.

What is Alocrom?

Alocrom (or Alodine in the US) is a Chromate conversion coating that is applied to aluminium alloys, which provides a level of corrosion protection. Alocrom is also good for paint adhesion and is electrically conductive.

When should alodine be used?

Alodine is actually a brand. It is an international brand of various materials from Henkel Technologies for use in conversion, anodizing and functional coatings that are suitable for use on aluminum, magnesium and other non-ferrous materials for corrosion protection and paint adhesion.

Is alodine toxic?

Yes, alodine is a dangerous compound and should be handled carefully. The compound contains chromium, which may cause allergic reactions. Exposures in large quantity may lead to kidney damage, failure and eventually death. If swallowed this product can cause corrosive damage to the gastrointestinal tract.

What is gold Iridite?

Commonly known as Yellow and Clear Iridite or Alodine finishes, chemical conversion coatings are used primarily for paint adhesion on aluminum. Although the iridescent gold finish is very attractive, it is not as durable as an anodized finish. Two classes of coatings are available under Mil-C-5541 and Mil-C-81706.

Who makes Iridite?

MacDermid Enthone Iridite Systems demonstrate our expertise in cleaning, etching and conversion coating of aluminum. Developed and refined to meet customers’ exacting needs, they are consistently specified for one reason they work.

What is Iridite NCP?

Iridite NCP is an innovative new process that offers extremely high resistance to corrosion, tested to 1000 hours on many aluminium alloys. For new chrome free technology that meets all environmental standards, bare corrosion resistance without painting, even after heating or baking.

Is alodine 1200 conductive?

Alodine 1200S conforms to MIL-C-5541E Class 1A and 3 coatings, Methods A, B & C application. Alodine coatings are electrically conductive.