Maintenance coatings have several functions but certainly one of their most important is to combat corrosion. Corrosion protection is important in both maintenance and industrial coatings and this is stressed in an article in Chemical Marketing Reporter (June 6 (1983) p. 5, 20). According to this article, which quotes results from a marketing research firm, Margolis Marketing and Research, corrosion resistance will provide the objectives for an important segment of the coatings industry in highway construction and in the automotive industry. The use of salt on highways to melt snow and ice is increasing and this causes billions of dollars of damage to iron and steel each year. U.S. roads are covered with over 10 million tons per year of salt. In the industrial area galvanised steel has become an important component of items subject to rust such as the automobile.