| O3/Cl-复合大气环境中Q235B钢的腐蚀演化特性 |
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| 引用本文： | 陈文娟,陈翌庆,潘刚.O3/Cl-复合大气环境中Q235B钢的腐蚀演化特性[J].腐蚀科学与防护技术,2019,31(1):8-18. |
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| 作者姓名： | 陈文娟 陈翌庆 潘刚 |
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| 作者单位： | 合肥工业大学材料科学与工程学院博士后流动站 合肥230009;合肥工业大学电子科学与应用物理学院 合肥230009;安徽科达洁能股份有限公司博士后工作站 马鞍山243041 |
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| 基金项目： | 国家自然科学基金;合肥工业大学宣城校区博士产学研启动专项 |
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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、电化学阻抗谱以及极化曲线等手段，研究了O3/Cl-复合大气环境中Q235B钢的腐蚀演化特性。结果表明，O3和Cl-的协同作用对Q235B钢的腐蚀有明显的促进作用，其腐蚀速率随着模拟环境中Cl-含量的增加而增大。腐蚀演化特性方面，Q235B钢在腐蚀的初期阶段腐蚀速率最大，中期阶段腐蚀速率迅速下降，而到后期阶段腐蚀速率又有所提高。相比于不含O3的大气环境，当Cl-浓度较低时，O3和Cl-对Q235B钢腐蚀产物组份的影响并不明显。而当Cl-浓度较高时，O3和Cl-能明显促进β-FeOOH的生成而抑制α-FeOOH和γ-FeOOH的生成。这说明O3/Cl-复合大气环境能促进Q235B钢的大气腐蚀与锈层相组分变化密切相关。
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| 关 键 词： | Q235B钢 O3 大气腐蚀 腐蚀产物 |
| 收稿时间： | 2018-04-08 |
Corrosion Evolution Characteristics of Q235B Steel inan O3/Cl- Containing Atmosphere |
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| Wenjuan CHEN,Yiqing CHEN,Gang PAN.Corrosion Evolution Characteristics of Q235B Steel inan O3/Cl- Containing Atmosphere[J].Corrosion Science and Protection Technology,2019,31(1):8-18. |
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| Authors: | Wenjuan CHEN Yiqing CHEN Gang PAN |
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| Abstract: | The corrosion evolution characteristic of Q235B steel in O3/Cl- containing atmosphere has been investigated by means of dry/wet cyclic corrosion test, X-ray diffractometer (XRD), electrochemical impedance spectroscopy (EIS) and polarization curve measurements. Results indicate that the synergism of O3 and Cl- has a significant effect on the corrosion of Q235B steel, and the corrosion rate of the steel increases with the increase of Cl- content in the simulated environment. The corrosion rate of low carbon steel is greatest in the early corrosion stage, then decreases rapidly in the second stage, and increases again in the third stage. Compared with the atmosphere without O3, the simultaneous presence of O3 and Cl- have little effect on the composition of corrosion products on Q235B steel when Cl- concentration is low, however the synergistic effect of O3 and Cl- can significantly promote the formation of β-FeOOH, while inhibit the generation of α-FeOOH and γ-FeOOH when Cl- concentration is high. This illustrates that the effect of O3 and Cl- on corrosion for Q235B steel is due to the change of corrosion products. |
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| Keywords: | Q235B steel O3 atmospheric corrosion corrosion product |
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