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As one of the important categories of hot-rolled products,hot-rolled steel plates for automobile applications generally undergo uniform corrosion or localized corrosion according to different environments of manufacturing,transportation and/or storage of the plates.General corrosion often takes place on the surface of a plate in the exterior part of a package,and only reduces the thickness of the plate and slightly increases the roughness of the surface; however,localized corrosion on the surface of a plate inside the package is likely to result in the formation of pit-like defects on the substrate of the plate,which cannot be removed thoroughly by normal acid pickling or sand blasting,and affects the application of the plate.This research report analyzes the phenomena and characteristics of the rusting behavior of hot-rolled steel plates for automobile applications,and the influencing factors are summaried.The corresponding preventative measures are proposed.
As one of the important categories of hot-rolled products, hot-rolled steel plates for automobile applications substantially undergo uniform corrosion or localized corrosion according to different environments of manufacturing, transportation and / or storage of the plates. General corrosion often takes place on the surface of a plate in the exterior part of a package, and only reduces the thickness of the plate and slightly increase the roughness of the surface; however, localized corrosion on the surface of a plate inside the package is likely to result in the formation of pit-like defects on the substrate of the plate, which can not be removed thoroughly by normal acid pickling or sand blasting, and affects the application of the plate. This research report analyzes the phenomena and characteristics of the rusting behavior of hot-rolled steel plates for automobile applications, and the influencing factors are summaried. The corresponding preventative measures are proposed.