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通过采用盐雾箱、紫外线老化试验箱、恒电位仪、原子力显微镜等仪器,对结构用S250GD+Z彩涂板的耐加速腐蚀性能进行了检测与分析,结果表明:S250GD+Z彩涂板的耐加速腐蚀性能达到《GB/T 12754-2006》及《EN 10169-2:2006》的要求;S250GD+Z彩涂板经2 000 h紫外线老化后,涂层表面粗糙度增加,阻抗值下降,导致涂层的耐腐蚀性能下降。
Through the use of salt spray chamber, UV aging chamber, potentiostat, atomic force microscope and other instruments, the structure of S250GD + Z color coated with accelerated corrosion resistance were tested and analyzed. The results show that: S250GD + Z color coated panels The accelerated corrosion resistance meets the requirements of “GB / T 12754-2006” and “EN 10169-2: 2006”. After the aging of S250GD + Z color coated board by 2 000 h UV, the surface roughness of the coating increases and the resistance value drops, Resulting in corrosion resistance of the coating decreased.