输电杆塔材料在模拟工业环境中的大气腐蚀行为研究

doi:10.11902/1005.4537.2017.077

中国腐蚀与防护学报

2017, Vol. 37

Issue (5): 460-466 DOI: 10.11902/1005.4537.2017.077

研究报告

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输电杆塔材料在模拟工业环境中的大气腐蚀行为研究

孟晓波¹,蒋武斌²,廖永力¹,李锐海¹,郑志军²(

),高岩³

1 南方电网科学研究院有限责任公司广州 510080
2 华南理工大学机械与汽车工程学院广州 510641
3 华南理工大学材料科学与工程学院广州 510641

Investigation on Atmospheric Corrosion Behavior of Transmission Tower Materials in Simulated Industrial Environments

Xiaobo MENG¹,Wubin JIANG²,Yongli LIAO¹,Ruihai LI¹,Zhijun ZHENG²(

),Yan GAO³

1 Electric Power Research Institute, China Southern Power Grid, Guangzhou 510080, China
2 School of Mechanical and Automotive Engineering, South China University of Technology, Guangzhou 510641, China
3 School of Material Science and Engineering, South China University of Technology, Guangzhou 510641, China

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摘要:

研究了输电杆塔材料Q235,Q345钢以及镀锌钢在NaHSO₃溶液喷雾的模拟工业大气环境中的腐蚀行为。使用腐蚀失重法获得了3种材料的腐蚀速率。结果表明,在NaHSO₃溶液低浓度范围 (≤0.005 mol/L),随浓度增加,Q235和Q345钢的腐蚀程度均较低且无明显变化;在中等浓度范围 (0.005~0.02 mol/L),随浓度增加,两种材料呈加速腐蚀的趋势;在较高浓度范围 (0.02~0.03 mol/L),两种材料的腐蚀程度最高,但随浓度增加并无明显改变。XRD分析和SEM观察进一步表明,以上腐蚀规律与是否发生片状γ-FeOOH向棉花状α-FeOOH转变有关。另外,在各种浓度下,镀锌钢的腐蚀产物类型无明显差异,主要由ZnO,Zn₄CO₃(OH)₆,Zn₅(CO₃)₂(OH)₆及Zn₄SO₄(OH)₆组成。

关键词 ：碳钢, 镀锌钢, 模拟工业环境, 大气腐蚀

Abstract：

The atmosphere corrosion behaviour of transmission tower materials including Q235, Q345 and galvanized steel in simulated industrial environments of spraying NaHSO₃ solutions was investigated by means of mass loss method, XRD analysis and SEM observation. The results indicated that the corrosion degree of Q235 and Q345 was not significantly increased with the increase of NaHSO₃ concentration of the simulated solution below 0.005 mol/L, and that the above two steels presented a trend of accelerated corrosion with the increase of NaHSO₃ concentration in the range between 0.005 and 0.02 mol/L, and that the corrosion degree of Q235 and Q345 had not obvious changes with the increase of NaHSO₃ concentration in the range between 0.02 and 0.03 mol/L. The results of XRD analysis and SEM observation further suggested that the above corrosion phenomena of Q235 and Q345 steel are strongly related to the fact whether the conversion of corrosion product γ-FeOOH to α-FeOOH did occur or not for the media with the amount of NaHSO₃ in every individual concentration range. In addition, the corrosion products on galvanized steel mainly consisted of ZnO, Zn₄CO₃(OH)₆, Zn₅(CO₃)₂(OH)₆ and Zn₄SO₄(OH)₆ despite different concentration of spraying solutions.

Key words： carbon steel galvanized steel simulated industrial environment atmospheric corrosion

收稿日期: 2017-05-16

基金资助:国家自然科学基金 (51477072)

作者简介: 孟晓波,男,1986年生,博士,高级工程师

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引用本文:

孟晓波,蒋武斌,廖永力,李锐海,郑志军,高岩. 输电杆塔材料在模拟工业环境中的大气腐蚀行为研究[J]. 中国腐蚀与防护学报, 2017, 37(5): 460-466.
Xiaobo MENG, Wubin JIANG, Yongli LIAO, Ruihai LI, Zhijun ZHENG, Yan GAO. Investigation on Atmospheric Corrosion Behavior of Transmission Tower Materials in Simulated Industrial Environments. Journal of Chinese Society for Corrosion and protection, 2017, 37(5): 460-466.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2017.077 或 https://www.jcscp.org/CN/Y2017/V37/I5/460

表1 Q235和Q345钢的主要化学成分

图1 3种材料在不同浓度NaHSO3溶液中加速腐蚀96 h后的表面宏观形貌

图2 Q235、Q345和镀锌钢腐蚀失重随着喷雾溶液浓度的变化曲线

图3 Q235和Q345钢经不同浓度的NaHSO3溶液加速实验96 h后腐蚀产物的XRD谱

图4 镀锌钢在NaHSO3喷雾浓度为0.001和0.005 mol/L时加速实验96 h后腐蚀产物的XRD谱

图5 Q235和Q345钢在不同浓度NaHSO3喷雾溶液下加速实验96 h后表面锈层微观形貌

图6 镀锌钢在不同浓度NaHSO3喷雾溶液下加速实验96 h后表面锈层微观形貌

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