Abstract
Spot tests on panels, quantitative resistance tests on unsupported films and long term tests on immersed coated plummets were run in order to determine the corrosion and solvent resistance of acid-catalyzed phenolic coatings, baked phenolic coatings, baked modified phenolic coatings, and acid-catalyzed poly-furfuryl alcohol coatings. In general, all coatings tested had excellent resistance to solvents, non-oxidizing acids and salts over a wide range of temperature. The phenolic coatings had superior resistance to oxidizing acids and the baked modified phenolic coatings were superior to the baked and acid-catalyzed phenolic coatings. However, all phenolic coatings, were attacked by high concentrations of oxidizing acids and by more dilute solutions at elevated temperatures. All tests on acid-catalyzed polyfurfuryl alcohol coatings showed these coatings to be completely resistant to alkalies in all concentrations over a wide range of temperature. Tests on coated plummets indicated that practical tests gave good correlation with both qualitative and quantitative screening tests on panels and unsupported films.
