36개월간 국내 옥외폭로시험에 따른 아연도강의 부식거동
Corrosion Behavior of Galvanized Steels with Outdoor Exposure Test in Korea for 36 Months
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다운로드
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참고문헌
키워드
초록
Atmospheric corrosion is generally an electrochemical degradation process of metal. It can be causedby various corrosion factors of atmospheric component, weather, and air pollutants. Moisture, particlesof sea salts, and sulfur dioxide are major factors in atmospheric corrosion. Galvanizing coating isone of the most efficient ways to protect iron from corrosion by zinc plating on the surface of theiron. Galvanized steels are being widely used in automobiles, building structures, roofing, and otherindustrial structures due to their high corrosion resistance compared to bare iron. Atmospheric corrosionof galvanized steel has shown complex corrosion behavior depending on coating process, coating thickness,atmospheric environment, and air pollutants. In addition, different types and kinds of corrosion productscan be produced depending on the environment. Lifespan of galvanized steels is also affected by theenvironment. Therefore, the objective of this study was to determine the corrosion behavior of galvanizedsteel under atmospheric corrosion at six locations in Korea. When the exposure time was increased,content of zinc from GA surface decreased while contents of iron and oxygen tended to increase. On the other hand, content of iron was constant even after 36 months of exposure of GI.
Abstract
Atmospheric corrosion is generally an electrochemical degradation process of metal. It can be causedby various corrosion factors of atmospheric component, weather, and air pollutants. Moisture, particlesof sea salts, and sulfur dioxide are major factors in atmospheric corrosion. Galvanizing coating isone of the most efficient ways to protect iron from corrosion by zinc plating on the surface of theiron. Galvanized steels are being widely used in automobiles, building structures, roofing, and otherindustrial structures due to their high corrosion resistance compared to bare iron. Atmospheric corrosionof galvanized steel has shown complex corrosion behavior depending on coating process, coating thickness,atmospheric environment, and air pollutants. In addition, different types and kinds of corrosion productscan be produced depending on the environment. Lifespan of galvanized steels is also affected by theenvironment. Therefore, the objective of this study was to determine the corrosion behavior of galvanizedsteel under atmospheric corrosion at six locations in Korea. When the exposure time was increased,content of zinc from GA surface decreased while contents of iron and oxygen tended to increase. On the other hand, content of iron was constant even after 36 months of exposure of GI.
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