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ANALYTICAL TECHNIQUES FOR ASSESSING THE EFFECTS OF ACID DEPOSITION ON PAINTED STEEL SUBSTRATES
Citation:
Moran, P., T. Simpson, G. Davis, AND C. Arah. ANALYTICAL TECHNIQUES FOR ASSESSING THE EFFECTS OF ACID DEPOSITION ON PAINTED STEEL SUBSTRATES. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/3-88/045 (NTIS PB89127500), 1988.
Description:
The report summarizes the outcome of studies performed for the period of October 1, 1987-May 15, 1988 of the first year of the program at The Johns Hopkins University and Martin-Marietta Laboratories. To date, initial exposure studies of painted steel (ASTM A569 CQ) coupons coated with a commercial alkyd primer/top coat system for steel structures (not bridges) and preliminary characterization of the free standing paint films have been completed. Surface analytical techniques including X-ray photoelectron spectroscopy (XPS), energy dispersive spectroscopy (EDS), and scanning electron microscopy (SEM) have been used in the characterization process. In addition, electrochemical impedance spectroscopy (EIS), fourier-transform infrared spectroscopy (FT-IR), weight loss/gain measurements, and coating/steel adhesion-strength studies have been performed to evaluate performance of sample coupons and paint films in aqueous acid environments.