Is Iridite same as chromate?
A. Iridite is a trade name for a whole family of chromate conversion coatings. Alodine 1200S is the trade name for aluminum chromate that meets MIL-C-5541. Iridite 14-2 is the particular trade name for a product that is chromate conversion for aluminum.
What is clear Iridite finish?
The coating can be applied on the aluminum surface, with or without color, to form a surface corrosion resistant film when it is dried. The darker coatings provide the greatest corrosion protection. Customers usually specify either “clear” (meaning with no color) or “gold”.
Can you chromate aluminum?
Chromate conversion coating is employed to impart brightness and improve the corrosion resistance of bare metal and as a substrate to provide improved paint adherence on nonferrous surface. It can be used on aluminum, zinc, tin plate, copper, cadmium, magnesium, and zinc-plated surfaces.
What is clear chromate?
Clear chromate is a chemical conversion coating that is applied over zinc plating during the surface coating process. Zinc plating is a soft, ductile, marginally solderable, corrosion-resistant finish. It protects the substrate and corrodes before the base metal, unlike most other commonly plated metals.
Is Iridite and alodine the same?
Chemical Film, also known as “Alodine” or “Iridite”, is a common plating process used for the protection of aluminum surfaces. This chemical process produces a corrosion resistant and protective film on aluminum and aluminum alloys – with or without color.
What color is chromate?
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 clear chromate coating?
Does chromate conversion add thickness?
Chem film is applied by dipping, brushing or spraying, and the chromate conversion coating thickness does not change the dimensions of the part. Conversion coating on aluminum can also improve the adhesion of both paint and primer if it is applied to an aluminum surface prior to the primer.
Is clear chromate conductive?
A. Class 3 chromate is conductive, but requires some contact pressure. It should NOT be wiped off. At room temperature, high-purity Al forms a 1-2 nm film of amorphous alumina in air ~instantaneously after cleaning.
How do you remove chem film from aluminum?
Synopsis: Very fresh chem-film (Alodine, Iridite, chromate conversion coating) can be softened with 50% nitric acid, then wiped from aluminum [credit Max Stein & Brian Terry].
How do you get rid of Iridite?
Very fresh chem-film (Alodine, Iridite, chromate conversion coating) can be softened with 50% nitric acid, then wiped from aluminum [credit Max Stein & Brian Terry].
What color is chromate coating?
Chromate conversion coatings are commonly applied to items such as screws, hardware and tools. They usually impart a distinctively iridescent, greenish-yellow color to otherwise white or gray metals. The coating has a complex composition including chromium salts, and a complex structure.
Is K2CrO4 a salt?
Potassium chromate is the inorganic compound with the formula (K2CrO4). This yellow solid is the potassium salt of the chromate anion. It is a common laboratory chemical, whereas sodium chromate is important industrially.
What is K2CrO4 test?
K2CrO4 Uses (Potassium Chromate) It is used in the qualitative inorganic analysis to detect the ions in aqueous solution. It is used in the manufacture of dyes. It is used in precipitation titrations as an indicator.
What are the benefits of aluminium chromate?
Aluminum Chromate provides an aesthetic benefit by improving the appearance of the metal. This finish also serves as a good base for paint, adhesives and other applications that require adhesion. This coating has low electrical contact resistance and is ideal for applications that warrant electrical conductivity
What is Iridite chemical film?
Mil-C-5541F, Chemical Films, Chromate ” Iridite “, (Aluminum) Chemical Film coatings are gelatinous films which provide some sort of a barrier medium to retard corrosion on aluminum surfaces and enhance adhesion of subsequent coatings such as paints and primers.
Does Iridite NCP® contain lead?
The IRIDITE NCP® does not contain Lead, Cadmium, Chromium (hexavalent or trivalent), Mercury or PBB/PBDE compounds. IRIDITE NCP® is an environmentally friendly chemical process that produces a protective conversion coating on aluminum and it’s alloys.
What is aluminium chromate conversion coating?
Aluminum chromate conversion coatings improve the appearance of the metal while serving as an excellent base for adhesives, paint, and other adhesion-requiring applications. If you are interested in aluminum chromate conversion coating or have questions about the processes we use, feel free to contact us.