Corrosion Behavior of Prepainted Steel Sheets for Construction

Yuan Qiang Tu; Hui Ping Bai; Jie Cai; Xian Qiu Huang; Chun Yan Huang

doi:10.4028/www.scientific.net/AMM.184-185.928

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vols. 184-185Corrosion Behavior of Prepainted Steel Sheets for...

Corrosion Behavior of Prepainted Steel Sheets for Construction

Abstract:

The behavior on artificial weathering of the S320GD+Z prepainted steel sheet for construction was studied by neutral salt spray test, accelerated UV aging test. Their corrosion performance after accelerated UV aging test was investigated by electrochemical impedance spectroscope technique and atomic force microscopy. The results showed that the resistance to neutral salt spray and the resistance to accelerated UV radiation of the tested samples can meet the demands of domestic and overseas standards. After 2000 h accelerated UV radiation test, the corrosion resistance of prepainted steel sheet declined with the increase of roughness and decrease of electrochemical impedance of the coating surface.