Atmospheric corrosion of structural materials, especially steel, produces a large economical loss with the development of industry, thus it is necessary to understand the corrosion behaviour of steel in corrosive environments to predict the life of structures. Among the air pollutants, sulphur dioxide is known as one of the strongest corrosion species [1]. In the present study, the corrosion environment was simulated with air plus a small amount of sulphur dioxide and galvanized steel sheets were tested with different coating weights of chromate. Table I shows the specification of the two types of galvanized steel sheets tested in the experiment, KCGL and KCGH.
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