The effect of acids on metal anti-corrosion coatings
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The effect of inorganic acids on coatings is primarily to hydrolyze certain polar groups of the polymers in the coating, to cause addition reactions and isomerization at double bonds, as well as to dissolve and decompose the pigments and additives present in the coating, ultimately causing the coating to lose its protective function. Organic acids accelerate the progression of harmful reactions by also having swelling and dissolving effects on polymers, thereby intensifying the erosion effect.
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