This paper presents an analysis of the chemical resistance of industrial coatings, specifically epoxy and glass flake reinforced vinyl ester, towards fatty acids. The study focuses on understanding how variables such as fatty acid type (chain length/molecular size), water content, and temperature influence the degradation of these coatings. Our findings indicate that the integrity of the coatings is impacted by the aggressiveness of the fatty acids, which is directly linked to the chain length (molecular size), water content, and storage temperature. Smaller molecular size fatty acids, along with increased water content and elevated temperatures, were observed to accelerate the deterioration of the coating materials. These results are crucial for choosing the technology to protect industry assets for storage and handling biofuel precursors based on vegetable oils and fatty acids.

Subject
Acids, Electrochemical impedance spectroscopy, Water, Coatings, Vinyl ester, Chemical resistance, Biofuels, Glass flake coatings, Epoxy coatings, Fatty acids, Coating defects, Delamination, Blistering
Keywords:
Biofuel Precursors, Storage Tanks, Free Fatty Acids (FFA), Chemical Resistance, Epoxy, Epoxy Novolac, Glass Flake Reinforced Vinyl Ester, Octanoic acid, Decanoic acid, Dodecanoic acid
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2025
Association for Materials Protection and Performance (AMPP)
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