What is the electrical conductivity of chromate conversion coatings, also called Alodine® or chem film, when applied to aluminum alloys? Unlike anodizing, Alodine coatings offer electrical conductivity for aluminum parts, when applied according to Class 3 of the MIL-DTL-5541 standard. Class 3 chemical conversion coatings protect against corrosion where low electrical resistance is required. Coating […]

The primary difference between Alodine (chem film) and anodizing is that anodizing is an electrolytic process and Alodine (chem film) is not. Alodine (chem film) and anodizing are both processes used in aluminum finishing to improve corrosion resistance. Both transform the outer layer of the surface of the metal. But Alodine (chem film) and anodizing […]

A chemical conversion coating is a surface treatment applied to metals in which the metal undergoes a chemical reaction at the surface. This chemical reaction transforms the metal surface into a thin protective layer. Chemical conversion coatings provide increased corrosion resistance and a uniform, inert surface for powder coating or paint adhesion. Chemical conversion coatings […]

A chromate conversion coating is a type of chemical conversion coating that is typically applied to aluminum alloys. Other types of chemical conversion coatings include iron phosphate and zinc phosphate coatings, typically applied to steel. A chromate conversion coating protects the underlying aluminum against corrosion, serves as a base for paint adhesion, and can allow […]