Steelwork, atmospheric corrosion

Paint for structural steelwork is required mainly to prevent corrosion in the presence of moisture. In an industrial atmosphere this moisture may carry acids and in a marine atmosphere this moisture may carry chlorides. Paint is therefore required to prevent contact between steel and corrosive electrolytes, and to stifle corrosion, should it arise as a result of mechanical damage or breakdown of the coating through age and exposure. 

If steelwork is a chemical environment, the corrosion process will accelerate as the iron and steel reacts with the polluted atmosphere. In order to control the rate of corrosion the surface must be carefully prepared before applying and maintaining a suitable paint system. 

These single-pack protective coatings, based on chlorinated rubber, are fast drying and give very good water, chemical and corrosion resistance. They are suitable for coating steel and concrete surfaces and are recommended for applications subject to chemically laden atmospheres or in a coastal environment and can be applied by spray, roller or brush. Typical uses include bridges, chemical plants, marine structures, ships and structural steelwork. 

Morcillo, M., and Ruiz, J. L. (1991). Severe corrosion of galvanized steelwork in a marine atmosphere Possible control through duplex systems. ]6th Int. Galv. Conf, EGGA, London, GH2/1-12. 

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