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Which of the following is a use for flash anodic coatings?

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Which of the following is a use for flash anodic coatings?

(a) Cartridge cases

(b) Airplane propeller

(c) Paint adherence

(d) Hydraulic pistons

The question was asked in examination.

This intriguing question comes from Mechanical Tests on Metals, Protection Against Wear in portion Wear of Metals, Mechanical Properties and Testing of Engineering Material & Metallurgy

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Correct choice is (c) Paint adherence

The best explanation: The production of the hard wear-resistant surface by anodizing has greatly extended the uses of magnesium and its alloys. Flash anodic coatings are often used as a base for paint adherence. Anodizing of zinc produces a coating which has a greater resistance to wear than chromite films.

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