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What is chem film?

Chem film, also called chemical film, is a chemical conversion coating. It typically refers to a chromate conversion coating applied to aluminum and its alloys. The chemfilm coating provides a layer of corrosion protection and a base for paint and primer. When applied as a thin coat, chem film can allow for electrical conductivity. Chem […]

Is Alodine conductive?

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 […]

Alodine vs. Anodize: What’s the difference?

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 […]

What is chemical conversion coating?

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. When applied to aluminum, a chemical conversion coating is sometimes called an aluminum conversion coating. Chemical conversion coatings provide increased corrosion […]

What is aluminum chromate conversion coating?

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 […]

Latest News & Products from Best Technology

Semi-Automated Inline Citric Passivation Solution with Data Tracking

For one medical device manufacturer, the design of a citric passivation solution faced two major challenges: The manufacturing process required performing a water-break test after cleaning parts, before proceeding to passivation. This meant that they could not use a fully automated passivation solution. The system had to have data tracking for quality control purposes. Semi-Automated […]

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