Conversion Coatings

Phosphate or chromate conversion coatings are used to enhance the corrosion resistance of steels. By themselves, they provide slightly better corrosion resistance than bare steel; more often, they are used in conjunction with another coating system. Conversion coatings are applied after hot-dip galvanizing and provide good corrosion protection when topcoated with an organic coating system. More detailed information on conversion coatings can be found in the articles "Phosphate Coatings" and "Chromate Conversion Coatings" in this Volume.

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