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中国腐蚀与防护学报  2024, Vol. 44 Issue (1): 237-245     CSTR: 32134.14.1005.4537.2023.031      DOI: 10.11902/1005.4537.2023.031
  研究报告 本期目录 | 过刊浏览 |
碳钢和高强钢在南海大气环境中的初期腐蚀行为研究
王靖羽1, 周学杰1,2(), 王洪伦3, 吴军1,2, 陈昊1,2, 郑鹏华1,2
1.武汉材料保护研究所有限公司 武汉 430030
2.武汉大气淡水环境材料腐蚀国家野外观测科学研究站 武汉 430030
3.航天发射场可靠性技术重点实验室 海口 571126
Initial Corrosion Behavior of Carbon Steel and High Strength Steel in South China Sea Atmosphere
WANG Jingyu1, ZHOU Xuejie1,2(), WANG Honglun3, WU Jun1,2, CHEN Hao1,2, ZHENG Penghua1,2
1.Wuhan Research Institute of Materials Protection, Wuhan 430030, China
2.Wuhan Materials Corrosion National Obserbation and Research Station, Wuhan 430030, China
3.Key Laboratory of Space Launching Site Reliability Technology, Haikou 571126, China
引用本文:

王靖羽, 周学杰, 王洪伦, 吴军, 陈昊, 郑鹏华. 碳钢和高强钢在南海大气环境中的初期腐蚀行为研究[J]. 中国腐蚀与防护学报, 2024, 44(1): 237-245.
Jingyu WANG, Xuejie ZHOU, Honglun WANG, Jun WU, Hao CHEN, Penghua ZHENG. Initial Corrosion Behavior of Carbon Steel and High Strength Steel in South China Sea Atmosphere[J]. Journal of Chinese Society for Corrosion and protection, 2024, 44(1): 237-245.

全文: PDF(14267 KB)   HTML
摘要: 

通过在海南文昌地区大气腐蚀试验站进行的南海大气环境户外腐蚀试验,对比分析碳钢和3种高强钢腐蚀性能的优劣,为开发耐南海大气腐蚀用钢提供数据支撑和理论依据。分别选用Q235B、Q350EWR1、Q355和Q345NQR2等4种钢材作为研究对象,在南海大气环境中进行为期0.5和1 a的户外曝露腐蚀试验,通过试样宏观形貌观察、腐蚀失重分析和电化学分析等手段研究其腐蚀行为机制。4种试样表面均发生严重的均匀腐蚀,综合各项分析结果,4种钢材在南海海洋大气环境中的耐蚀性能排序为:Q355 > Q345NQR2 > Q235B >Q350EWR1。

关键词 南海海洋大气环境大气腐蚀试验高强钢电化学测试    
Abstract

The corrosion performance of carbon steel and three kinds of high-strength steels is comparatively assessed via outdoor exposure in marine atmosphere of the South China Sea in a test site at Wenchang area of Hainan Province, which provides data support and theoretical basis for the development of steels resistant to atmospheric corrosion in the South China Sea. Four kinds of steel, Q235B, Q350EWR1, Q355 and Q345NQR2, were selected as the testing materials. Outdoor corrosion tests were carried out for half a year and one year respectively, and the tested steels was characterized by means of mass loss measurement, metallographic observation and electrochemical analysis. Serious uniform corrosion occurred on the surface of the four steels. Based on the analysis results, the corrosion resistance of the four kinds of steels in the marine atmosphere of the South China Sea is ranked as the following sequence: Q355 > Q345NQR2 > Q235B > Q350EWR1.

Key wordsSouth China Sea    marine atmospheric environment    atmospheric corrosion test    high strength steel    electrochemical test
收稿日期: 2023-02-13      32134.14.1005.4537.2023.031
ZTFLH:  TG174  
基金资助:科技基础资源调查专项(2021FY100600)
通讯作者: 周学杰,E-mail:zhouxj11@163.com,研究方向为腐蚀与防护
Corresponding author: ZHOU Xuejie, E-mail: zhouxj11@163.com
作者简介: 王靖羽,男,1997年生,硕士生
SteelCSiMnPSCuCrNiFe
Q235B0.1640.2040.2670.0200.0280.0100.0140.009Bal.
Q350EWR1≤0.070.27≤0.500.0130.0020.3513.4970.188Bal.
Q3550.0890.3860.8890.0740.0050.2790.4740.147Bal.
Q345NQR20.1730.4001.6030.0150.0080.00480.0140.023Bal.
表1  4种钢材主要成分 (mass fraction / %)
图1  4种钢材在南海大气环境中暴晒0.5和1 a后的原始宏观腐蚀形貌
图2  4种钢材在南海大气环境中暴晒0.5和1 a后除锈后的宏观腐蚀形貌
图3  4种钢材0.5和1a后除锈前和除锈后的微观腐蚀形貌
图4  4种钢材在南海大气环境中暴晒0.5和1 a后的平均腐蚀速率对比
图5  4种钢材在南海海洋大气环境中腐蚀试验后腐蚀产物的XRD谱
图6  4种钢材在南海海洋大气环境中腐蚀试验0.5和1 a的极化曲线
图7  4种钢材在南海海洋大气环境中腐蚀试验0.5和1 a的EIS谱
SteelTime / aEcorr / mVIcorr / μA·cm-2Rs / Ω·cm2CPEr / FRt / Ω·cm2CPEdl / FRct / Ω·cm2
Q235B0.5-489.1950.8845.690.0053111.830.04776583.3
Q350EWR10.5-430.5711.1255.980.006048.850.03894445.1
Q3550.5-411.4870.9616.330.0002481.570.002791883.2
Q345NQR20.5-424.1140.0296.060.0008668.370.004661416.4
Q235B1-353.3671.4825.790.0018224.450.02745465.9
Q350EWR11-333.5291.6455.880.0013620.040.03306428.6
Q3551-378.6831.2226.010.0002187.660.001181765.2
Q345NQR21-336.4450.5716.140.0009056.580.00153860.5
表2  4种钢材腐蚀试验0.5和1 a后的电化学拟合结果
图8  4种钢材在南海海洋大气环境中腐蚀试验后EIS谱的等效电路图
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