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中国腐蚀与防护学报  2021, Vol. 41 Issue (4): 450-460    DOI: 10.11902/1005.4537.2020.125
  研究报告 本期目录 | 过刊浏览 |
O3/SO2复合大气环境中Q235B钢的腐蚀演化特性
陈文娟1,2, 方莲3, 潘刚3,4()
1.合肥工业大学 高性能铜合金材料及成形加工教育部工程研究中心 合肥 230601
2.合肥工业大学材料科学与工程学院博士后流动站 合肥 230009
3.合肥工业大学宣城校区基础部 宣城 242000
4.合肥工业大学 工业安全与应急技术安徽省重点实验室 合肥 230601
Corrosion Evolution Characteristics of Q235B Steel in O3/SO2 Composite Atmosphere
CHEN Wenjuan1,2, FANG Lian3, PAN Gang3,4()
1.Engineering Research Center of High Performance Copper Alloy Materials and Processing, Ministry of Education, Hefei University of Technology, Hefei 230601, China
2.Postdoctoral Research Station, School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China
3.Foundation Department of Xuancheng Campus, Hefei University of Technology, Xuancheng 242000, China
4.Anhui Province Key Laboratory of Industry Safety and Emergency Technology, Hefei University of Technology, Hefei 230601, China
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摘要: 

采用干/湿交替的实验方法模拟大气腐蚀过程。运用X射线衍射、3D激光测量显微镜、电化学阻抗谱以及极化曲线等手段，研究了O3/SO2复合大气环境中Q235B钢的腐蚀演化特性。结果表明，O3和SO2的交互作用对Q235B钢的腐蚀有明显的抑制作用。腐蚀演化特性方面，当模拟环境中Na2SO3浓度为0.01 mol/L时，O3/SO2复合大气环境中Q235B钢的腐蚀速率呈先迅速增大而后缓慢减小的趋势; 当模拟环境中Na2SO3浓度为0.05 mol/L时，O3/SO2复合大气环境中Q235B钢的腐蚀速率呈先缓慢增大后迅速下降的趋势; 当模拟环境中Na2SO3浓度为0.10 mol/L时，O3/SO2复合大气环境中Q235B钢的腐蚀速率呈先增大而后缓慢减小的趋势。相比于不含O3的大气环境，当模拟大气中SO2含量较低时，O3和SO2的交互作用会促进具有保护性腐蚀产物中α-FeOOH生成；而当大气中SO2含量较高时，O3对腐蚀产物相组成影响不明显。
关键词 ： Q235B钢,  O3,  大气腐蚀,  腐蚀产物    
Abstract：

The corrosion evolution characteristics of Q235B steel in O3/SO2 containing composite atmosphere was examined by means of a simulation of dry/wet cyclic corrosion test, electrochemical impedance spectroscopy (EIS) and polarization curves measurements, as well as X-ray diffractometer (XRD) and 3D laser measurement microscope. The results show that the synergistic effect of O3 and SO2 can obviously inhibit the corrosion of Q235B steel. When the concentration of Na2SO3 in the simulated environment is 0.01 mol/L, the corrosion rate of Q235B steel in the simulated O3/SO2 containing composite atmosphere increases rapidly and then decreases slowly. When the concentration of Na2SO3 in the simulated environment is 0.05 mol/L, the corrosion rate of Q235B steel increases slowly and then decreases rapidly. When the concentration of Na2SO3 in the simulated atmosphere is 0.10 mol/L, the corrosion rate of Q235B steel increases first and then decreases slowly. Compared with the atmosphere without O3, when the content of SO2 in the simulated atmosphere is lower, the synergistic effect of O3 and SO2 will promote the formation of α-FeOOH. When the content of SO2 in the atmosphere is higher, the effect of O3 on the phase composition of the corrosion products is not obvious.
Key words： Q235B steel    O3    atmospheric corrosion    corrosion product
收稿日期: 2020-07-17     
ZTFLH:  TG172.3  
基金资助:中央高校基本科研业务费专项(PA2020GDSK0078);中央高校基本科研业务费专项(PA2020GDGP0054);合肥工业大学“脱贫攻坚与乡村振兴战略”研究项目(JS2020HGXJ0102)
通讯作者: 潘刚     E-mail: dagang@hfut.edu.cn
Corresponding author: PAN Gang     E-mail: dagang@hfut.edu.cn
作者简介: 陈文娟，女，1986年生，博士，讲师
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引用本文:

陈文娟, 方莲, 潘刚. O3/SO2复合大气环境中Q235B钢的腐蚀演化特性[J]. 中国腐蚀与防护学报, 2021, 41(4): 450-460.
Wenjuan CHEN, Lian FANG, Gang PAN. Corrosion Evolution Characteristics of Q235B Steel in O3/SO2 Composite Atmosphere. Journal of Chinese Society for Corrosion and protection, 2021, 41(4): 450-460.

链接本文:

https://www.jcscp.org/CN/10.11902/1005.4537.2020.125      或      https://www.jcscp.org/CN/Y2021/V41/I4/450

SampleNa2SO3 / mol·L-1O3 / mg·m-3
#1-10.010
#1-20.0135
#2-10.050
#2-20.0535
#3-10.100
#3-20.1035
表1  模拟大气环境中Na2SO3的浓度和O3的含量
图1  Q235钢模拟大气环境中低碳钢的腐蚀增重曲线
图2  Q235B钢在模拟大气中腐蚀速率随干/湿交替次数变化的曲线
图3  Q235B钢在模拟大气中经过30 CCT后腐蚀产物的XRD谱
图4  大气环境中带锈电极的极化曲线结果
图5  Q235B钢样品在模拟大气中经过不同干/湿交替周次腐蚀后的带锈电极极化电阻曲线
图6  Q235B 钢带锈电极在大气模拟液中的Bode图
图7  拟合模拟大气中带锈电极的电化学阻抗谱的等效电路
图8  Q235B钢带锈电极大气模拟液中EIS拟合结果
图9  Q235B钢在模拟大气中经过2 CCT，10 CCT和30 CCT腐蚀后表面的3D激光显微镜照片
图10  Q235B钢在模拟大气中经过不同时间腐蚀后的表面粗糙度
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