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 polyfurfuryl 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.
The Chemical Resistance of Phenolic and Furfuryl Alcohol Type Coatings⋆
RAYMOND B. SEYMOUR—Executive Vice-President and Technical Director of Atlas Mineral Products Co., Mertztown, Pa., holds degrees from the University of New Hampshire and a doctorate of philosophy at University of Iowa, 1937. He has been Research Chemist for Goodyear Tire & Rubber Co., Director, Industrial Research Institute, University of Chattanooga, Tenn., and has held various positions with Atlas Mineral Products Co. He is author and coauthor of several papers on paints, finishes and industrial research.
ROBERT H. STEINER—Research Director of Atlas Mineral Products Company, Mertztown, Pa., he holds a BS Chem degree and Ph D from the University of Pittsburgh. He was research chemist for Firestone Tire and Rubber Company for seven years specializing in vinyl resins and plastics before joining Atlas in 1950.
