Accelerated Prediction Methodologies to Predict the Outdoor Exposure Lifespan of Galvannealed Steel
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초록
Generally, atmospheric corrosion is the electrochemical degradation of metal that can be caused by variouscorrosion factors of atmospheric components and weather, as well as air pollutants. Specifically, moistureand particles of sea salt and sulfur dioxide are major factors in atmospheric corrosion. Using galvanizedsteel is one of the most efficient ways to protect iron from corrosion by zinc plating on the surface ofthe iron. Galvanized steel is widely used in automobiles, building structures, roofing, and other industrialstructures due to their high corrosion resistance relative to iron. The atmospheric corrosion of galvanizedsteel shows complex corrosion behavior, depending on the plating, coating thickness, atmospheric environment,and air pollutants. In addition, corrosion products are produced in different types of environments. Thelifespans of galvanized steels may vary depending on the use environment. Therefore, this study investigatedthe corrosion behavior of galvannealed steel under atmospheric corrosion in two locations in Korea, andthe lifespan prediction of galvannealed steel in rural and coastal environments was conducted by meansof the potentiostatic dissolution test and the chemical cyclic corrosion test.
Abstract
Generally, atmospheric corrosion is the electrochemical degradation of metal that can be caused by variouscorrosion factors of atmospheric components and weather, as well as air pollutants. Specifically, moistureand particles of sea salt and sulfur dioxide are major factors in atmospheric corrosion. Using galvanizedsteel is one of the most efficient ways to protect iron from corrosion by zinc plating on the surface ofthe iron. Galvanized steel is widely used in automobiles, building structures, roofing, and other industrialstructures due to their high corrosion resistance relative to iron. The atmospheric corrosion of galvanizedsteel shows complex corrosion behavior, depending on the plating, coating thickness, atmospheric environment,and air pollutants. In addition, corrosion products are produced in different types of environments. Thelifespans of galvanized steels may vary depending on the use environment. Therefore, this study investigatedthe corrosion behavior of galvannealed steel under atmospheric corrosion in two locations in Korea, andthe lifespan prediction of galvannealed steel in rural and coastal environments was conducted by meansof the potentiostatic dissolution test and the chemical cyclic corrosion test.
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