镀锌钢在东莞大气及模拟大气中的腐蚀行为
Corrosion Behavior of Galvanized Steel in Dongguan Atmosphere and Simulated Atmosphere
摘 要
采用失重法、金相检验、扫描电镜法（SEM）、X射线衍射法（XRD）、能量色散谱法（EDS）以及电化学阻抗谱法（EIS）研究了镀锌钢在东莞大气环境和模拟大气环境中暴露不同时间后的腐蚀行为。结果显示：在东莞大气中，镀锌钢在暴露早期发生了局部腐蚀，随着暴露时间的延长，腐蚀速率先迅速降低然后逐步稳定，耐蚀性先降低后增强；腐蚀12个月后，主要腐蚀产物为ZnO和Zn4SO4（OH）6；在模拟大气环境中，镀锌钢的腐蚀速率和耐蚀性随时间的变化规律和东莞实地大气暴露试验的结果具有良好相关性。
大气腐蚀
模拟试验
电化学阻抗谱
galvanized steel
atmospheric corrosion
simulated experiment
electrochemical impedance spectroscopy
Abstract
The corrosion behavior of galvanized steel in Dongguan atmospheric environment and simulated atmospheric environment was studied by weight-loss method, metalloscopy, scanning electron microscopy (SEM), X-ray diffraction (XRD), energy dispersive spectroscopy (EDS) and electrochemical impedance spectroscopy (EIS). The results show that localized corrosion occurred in the early exposure in Dongguan atmosphere. With the extension of exposure time, the corrosion rate of galvanized steel firstly decreased rapidly and then gradually stabilized. At the same time, the corrosion resistance of galvanized steel firstly decreased and then increased. The main corrosion products of galvanized steel were ZnO and Zn4SO4(OH)6 after being exposed in Dongguan atmosphere for 12 months. In the simulated atmospheric environment, the trend of corrosion rate and corrosion resistance of galvanized steel with time had good correlation with the results of field exposure test in Dongguan.
中图分类号 TG174 DOI 10.11973/fsyfh-201710006
所属栏目 试验研究
基金项目 广东电网公司科技开发项目（K-GD2013-0498002-002）
收稿日期 2016/1/19
修改稿日期
网络出版日期
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引用该论文: YANG Fang,LIANG Yongchun,KUANG Yinjie,LI Yuchun. Corrosion Behavior of Galvanized Steel in Dongguan Atmosphere and Simulated Atmosphere[J]. Corrosion & Protection, 2017, 38(10): 767
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参考文献
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【6】NISHIKATA A,ZHU Q,TADA E. Long-term monitoring of atmospheric corrosion at weathering steel bridges by an electrochemical impedance method[J]. Corrosion Science,2014,87(5):80-88.
【7】施彦彦,张昭,张鉴清,等. 锌及其合金的大气腐蚀研究现状[J]. 中国腐蚀与防护学报,2005,25(6):373-379.
【8】MA Y T,LIU Y,WANG F H. Corrosion of low carbon steel in atmospheric environments of different chloride content[J]. Corrosion Science,2009,51(10):997-1006.
【9】林翠,李晓刚,赵晴. SO2在碳钢初期大气腐蚀中的作用[J]. 装备环境工程,2007,4(6):13-18.
【10】CASTANO J G,BOTERO C A,RESTREPO A H,et al. Atmospheric corrosion of carbon steel in Colombia[J]. Corrosion Science,2009,52(3):216-223.
【11】王光雍,王海江,李兴濂,等. 自然环境的腐蚀与防护[M]. 北京:化学工业出版社,2005.
【12】林翠,王凤平,李晓刚. 大气腐蚀研究方法进展[J]. 中国腐蚀与防护学报,2004,24(4):249-255.
【13】田玉琬,程学群,李晓刚. 海洋大气腐蚀的室内模拟加速试验方法研究[J]. 腐蚀与防护,2014,35(8):781-784.
【14】钟西舟,王振尧,刘艳洁,等. 镀锌钢在模拟海洋大气环境下的腐蚀行为[J]. 中国腐蚀与防护学报,2015,35(2):151-155.
【15】朱志平,左羡第,银朝晖. 锌在模拟工业大气环境下的腐蚀行为研究[J]. 装备环境工程,2015,12(4):1-5.
【16】曾宪光,郑兴文,龚敏,等. 碳钢和镀锌钢在都江堰大气环境中的腐蚀行为研究[J]. 中国腐蚀与防护学报,2015,35(3):271-278.
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