doi: 10.14773/CST.2020.19.6.326 인용 BibTeX RIS Mendeley

36개월간 국내 옥외폭로시험에 따른 갈바륨 강판의 대기부식거동 및 표면외관 변화

Atmospheric Corrosion and Surface Appearance of Galvalume Steel following Outdoor Exposure for 36 Months: A Korean Study

• 김기태(안동대학교) ,
• 유영란(안동대학교 안동대학교) ,
• 김영식 ,

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Galvalume steel (GL) is widely used in marine and industrial environments. It is characterized by better corrosion resistance than carbon steel. However, corrosion and economic losses may occur as the usage time is increased. Therefore, in this study, an outdoor exposure test of GL for 36 months was conducted across six regions of Korea. Parameters such as corrosion rate, chrominance (color, chroma, and brightness), glossiness, and surface appearance were analyzed. The results showed no significant change in appearance, and the initial corrosion rate was large, but a tendency to decrease with time was observed. Increased outdoor exposure time led to increase in the level of corrosion products. In the case of coastal areas where S, Cl, and other elements were detected, a relatively high decrease in Zn content was observed. Al forms a protective oxide film and exists in the coating layer, but Zn dissolves due to its chemical activity and low potential.