Abstract
The application of conversion coatings to D16T aluminum alloy significantly increases its corrosion resistance and weakens its subfilm corrosion under a lacquer coating. In the absence of a lacquer layer, the process of chemical oxidation guarantees higher protective properties as compared with chrome phosphatizing. The specimens made of aluminum alloy with alkyd coatings have almost the same corrosion resistance for chrome phosphatized and chemically oxidized surfaces. The protective effect of chrome-phosphatized coatings can be explained by the interaction of the phosphate layer with functional groups of alkyd resin.
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