What is a Alodine treatment?

Chromate-treated aluminum material is generally called allodin, and ""alodine"" is a registered trademark of Nihon Parkerizing Co., Ltd. (the allodin method is a treatment method developed by Amchem Product of the United States). Alodine treatment, also called alsurf treatment, is a chemical conversion treatment applied to aluminum materials to form an excellent corrosion-resistant film on aluminum and its alloys. Although general alumite is not conductive, allodin is characterized by its conductivity. However, since it is also a chemical conversion coating containing hexavalent chromium, which is known as an environmental pollutant, in recent years, chemical conversion coatings of trivalent chromium, non-chromium allodin, and palcoat treatment have been developed as alternatives.

Application of Alodine treatment

Since a thin film can be formed on the surface only by a chemical reaction, it can be applied to products with complicated shapes, and it is used for heat sinks (electronic equipment), equipment parts / automobile parts (for weight reduction purposes), and aluminum alloys in general. , Also used in aviation parts. Since the color of the film can be changed depending on the chemical solution used, it can be used properly for colorless (# 1000) and yellow (# 1200). It is also very effective as a treatment for aluminum materials for energization purposes. In addition, it is also used as a paint base to support the adhesion between aluminum and paint.

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