热镀锌层在模拟沿海工业大气环境中的腐蚀行为
Corrosion behavior of hot dip galvanized coating exposed in a simulated coastal-industrial atmosphere
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摘要: 通过无浸润式干湿交替循环加速腐蚀试验模拟热镀锌层在沿海工业大气环境中的腐蚀过程. 采用腐蚀失重和动态极化曲线，结合扫描电子显微镜(SEM)、能谱分析仪(EDS)、X射线衍射(XRD)和极化曲线分别对腐蚀24，48，96，192，336和672 h的热浸镀锌钢试样进行测试分析. 结果表明,镀锌层的腐蚀动力学变化规律符合经验公式D=Btn，腐蚀速率随时间延长先减小后增大. 腐蚀产物在96 h前均匀致密，腐蚀过程受阴极扩散过程控制，96 h后腐蚀过程受阳极过程控制. 含Cl元素的腐蚀产物NaZn4SO4Cl(OH)6·6H2O和Zn12(OH)15Cl3(SO4)3·5H2O对镀锌层的保护作用比初期产物Zn5(CO3)2(OH)6等保护作用差.Abstract: The corrosion process of hot-dip galvanized coating in a simulated coastal-industrial atmosphere was investigated by means of an unsaturated dry-wet alternating cycle accelerated corrosion test. By using weight loss measurement and potentiodynamic polarization, scanning electron microscopy (SEM), energy-dispersive spectroscopy (EDS) and X-ray diffractometry (XRD) analyzed corrosion behavior of hot-dip galvanized coating exposed after 24, 48,96, 192, 336, and 672 h. The results show that corrosion kinetics followed the empirical equation D=Btn, and there is a corrosion rate transition from corrosion acceleration to deceleration. Before 96 h the corrosion process is controlled by the cathode diffusion process, while after 96 h by the anodic. The protectiveness of corrosion products NaZn4SO4Cl(OH)6·6H2O and Zn12(OH)15Cl3(SO4)3·5H2O which containing Cl is worse than that of initial products Zn5(CO3)2(OH)6.
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[1] 章小鸽. 锌的腐蚀与电化学[M]. 北京： 冶金工业出版社， 2008.[2] Almeida E, Morcillo M, Rosales B. Atmospheric corrosion of zinc partⅠ: rural and urban atmospheres[J]. British Corrosion Journal, 2000, 35(4): 284-288.[3] Almeida E, Morcillo M, Rosales B. Atmospheric corrosion of zinc partⅡ: marine atmospheres[J]. British Corrosion Journal, 2000, 35(4): 289-296.[4] Cole I S, Ganther W D,Furman S A,et al. Pitting of zinc: observations on atmospheric corrosion in tropical countries[J]. Corrosion Science, 2010, 52(3): 848-858.[5] 王绍明， 萧以德， 张三平. SO2/盐雾复合循环加速腐蚀试验模拟锌在户外大气暴露腐蚀行为[J]. 腐蚀与防护, 2005, 26(1): 13-17.Wang Shaoming, Xiao Yide, Zhang Sanping. SO2/Salt-spray synergistic accelerated test simulating atmospheric exposure corrosion behavior of zinc[J]. Corrosion and Protection, 2005, 26(1): 13-17.[6] 曹楚南. 中国材料的自然环境腐蚀[M]. 北京： 化学工业出版社, 2005.[7] 孔德军， 王进春， 叶存冬. X70高钢级管线焊接接头盐雾腐蚀机理[J]. 焊接学报， 2015， 36(5)： 51-54.Kong Dejun, Wang Jinchun, Ye Cundong. Mechanism of salt spray corrosion of X70 high grade pipeline steel welded joints[J]. Transactions of the China Welding Institution, 2015， 36(5)： 51-54.[8] 苟国庆， 黄 楠， 陈 辉, 等. 高速列车A7N01S-T5铝合金焊接接头盐雾腐蚀行为分析[J]. 焊接学报， 2011， 32(10)： 17-20.Gou Guoqing, Huang Nan, Chen Hui,et al. Analysis on corrosion behavior of welded joint of A7N01ST5 aluminum alloy for high-speed train[J]. Transactions of the China Welding Institution, 2011, 32(10): 17-20.[9] Boelen B, Schmitz B, Defourny J,et al. A literature survey on the development of an accelerated laboratory test method for atmospheric corrosion of precoated steel products[J]. Corrosion Science, 1993, 34(11): 1923-1931.[10] Ma Y T, Li Y, Wang F H. The atmospheric corrosion kinetics of low carbon steel in a tropical marine environment[J]. Corrosion Science,2010, 52 (5): 1796-1800. -
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