模拟海洋大气下碳钢及镀锌钢的腐蚀产物演变

doi:10.3969/j.issn.1000-565X.2017.09.019

华南理工大学学报（自然科学版） ›› 2017, Vol. 45 ›› Issue (9): 135-141.doi: 10.3969/j.issn.1000-565X.2017.09.019

模拟海洋大气下碳钢及镀锌钢的腐蚀产物演变

高岩¹ 黄殷辉¹ 孟晓波² 廖永力² 李锐海²

1．华南理工大学材料科学与工程学院，广东广州 510640; 2．南方电网电力科学研究院，广东广州 510080

收稿日期:2016-12-14 修回日期:2017-01-04 出版日期:2017-09-25 发布日期:2017-08-30
通信作者: 高岩( 1962-) ，女，博士，教授，主要从事金属腐蚀与多孔形状记忆合金研究． E-mail:meygao@scut.edu.cn
作者简介:高岩( 1962-) ，女，博士，教授，主要从事金属腐蚀与多孔形状记忆合金研究．
基金资助:
国家自然科学基金资助项目( 51471072)

Evolution of Corrosion Products of Carbon Steels and Galvanized Steel in Simulated Marine Atmosphere

GAO Yan¹HUANG Yin-hui¹ MENG Xiao-bo² LIAO Yong-^li2 LI Rui-hai²

1.School of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China; 2.Electric Power Research Institute,CSG,Guangzhou 510080,Guangdong,China

Received:2016-12-14 Revised:2017-01-04 Online:2017-09-25 Published:2017-08-30
Contact: 高岩( 1962-) ，女，博士，教授，主要从事金属腐蚀与多孔形状记忆合金研究． E-mail:meygao@scut.edu.cn
About author:高岩( 1962-) ，女，博士，教授，主要从事金属腐蚀与多孔形状记忆合金研究．
Supported by:
Supported by the National Natural Science Foundation of China( 51471072)

摘要/Abstract

摘要： 对Q235、Q345 及镀锌钢在中性盐雾箱中连续喷雾2、6、24、48、72、144、240、360 h，研究了在模拟海洋大气下3 种材料的腐蚀产物组成和形态随时间的演变规律．通过失重法计算腐蚀速率，并用XＲD 和SEM 对腐蚀产物进行表征．结果表明: 3 种钢材的腐蚀动力学曲线遵循指数函数规律; 其中镀锌钢的腐蚀速率远远低于碳钢，而两种碳钢的腐蚀速率很接近; Q235 和Q345 钢的腐蚀产物主要有α-FeOOH、β-FeOOH、γ-FeOOH 和Fe₃O₄，其随着喷雾时间的延长呈现不同的变化规律; 不同腐蚀产物呈现不同的形貌特征，γ-FeOOH 为花片状，β-FeOOH 为棉花状，报道较少的Fe₃O₄为尖晶石状; 相比于两种碳钢，镀锌钢的锈层则更加密实．

关键词: 低碳钢, 镀锌钢, 盐雾试验, 腐蚀产物, 腐蚀形貌

Abstract: In order to investigate the evolution of the composition and form of steel corrosion products with time in simulated marine atmosphere,Q235,Q345 and galvanized Q235 steels were exposed in neutral salt spray boxes for 2,6,24,48,144,240,360h.Then,the corrosion rates were calculated via the weight loss method,and the corrosion products were characterized by means of XRD and SEM.The results show that ( 1) the corrosion kinetics curves of the three kinds of steels follow the bilogarithmic equation; ( 2) the galvanized Q235 steel has a much lower corrosion rate than Q235 and Q345 steels,while the corrosion rate of Q235 steel is close to that of Q345 steel; ( 3) the corrosion products forming on Q235 and Q345 steels are mainly α-FeOOH,β-FeOOH,γ-FeOOH and Fe₃O₄ ,and the change rules of these products with the spraying time are different; ( 4) different corrosion products exhibit different topographic characteristics,specifically,γ-FeOOH ,β-FeOOH and less reported Fe₃O₄ are respectively flower-like,cotton ball-like and spinelle-like; and ( 5) as compared with the two kinds of carbon steels,the galvanized Q235 steel has a more compact rust layer.

Key words: low carbon steel, galvanized steel, salt spray test, corrosion product, corrosion morpholog

中图分类号:

TG172.3

高岩黄殷辉孟晓波廖永力李锐海. 模拟海洋大气下碳钢及镀锌钢的腐蚀产物演变[J]. 华南理工大学学报（自然科学版）, 2017, 45(9): 135-141.

GAO Yan HUANG Yin-hui MENG Xiao-bo LIAO Yong-li LI Ｒui-hai. Evolution of Corrosion Products of Carbon Steels and Galvanized Steel in Simulated Marine Atmosphere[J]. Journal of South China University of Technology (Natural Science Edition), 2017, 45(9): 135-141.

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模拟海洋大气下碳钢及镀锌钢的腐蚀产物演变

Evolution of Corrosion Products of Carbon Steels and Galvanized Steel in Simulated Marine Atmosphere

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