| 粉土pH对X70钢早期电化学腐蚀行为的影响 |
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| 引用本文： | 韩鹏,严奕博,谢瑞珍,何斌,韩鹏举. 粉土pH对X70钢早期电化学腐蚀行为的影响[J]. 腐蚀与防护, 2017, 38(5). DOI: 10.11973/fsyfh-201705004 |
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| 作者姓名： | 韩鹏 严奕博 谢瑞珍 何斌 韩鹏举 |
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| 作者单位： | 太原理工大学建筑与土木工程学院,太原,030024 |
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| 基金项目： | 山西省自然科学基金，山西省高等学校优秀创新团队项目，天津大学水利工程仿真与安全国家重点实验室项目 |
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| 摘 要： | 采用电化学阻抗(EIS)、极化曲线和扫描电子显微镜观察(SEM)等方法,通过室内模拟试验研究了X70钢在不同pH粉土中的早期电化学腐蚀行为。结果表明:X70钢在酸性(H_2SO_4)、碱性(NaOH)以及中性粉土中的腐蚀差异较明显。在模拟酸性粉土中,X70钢在pH为5的粉土中腐蚀龄期达21d时的自腐蚀电位明显高于在其他环境中的,且X70钢的腐蚀速率随着pH的增大(4~5),呈现出降低的趋势。在模拟碱性粉土中,液相介质中的OH-对X70钢的腐蚀行为有较大的影响,且X70钢的腐蚀速率随着pH的增大(9~11),呈现出升高的趋势。
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| 关 键 词： | 粉土腐蚀 X70钢 pH 电化学阻抗谱 极化曲线 SEM |
Influence of pH of Silt on the Early Electrochemical Corrosion Behavior of X70 Steel |
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| HAN Peng,YAN Yibo,XIE Ruizhen,HE Bin,HAN Pengju. Influence of pH of Silt on the Early Electrochemical Corrosion Behavior of X70 Steel[J]. Corrosion & Protection, 2017, 38(5). DOI: 10.11973/fsyfh-201705004 |
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| Authors: | HAN Peng YAN Yibo XIE Ruizhen HE Bin HAN Pengju |
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| Abstract: | The early electrochemical corrosion behavior of X70 steel in silt environment with different pH values was studied by means of electrochemical impedance spectroscopy (EIS),polarization curves and scanning electron microscopy (SEM).The results show that the corrosion of X70 steel in acidic (H2SO1),alkaline (NaOH) and neutral silt was different obviously.In simulated acid silt,the free corrosion potential of X70 steel in the silt of pH 5 was obvious higher than that in the others after 21 d.The corrosion rate of X70 steel decreased with the increase of pH (4～5).In the simulated alkaline silt,the corrosion behavior of X70 steel was greatly affected by the OH ions in liquid medium,and the corrosion rate of X70 steel increased with the pH (9～11) increasing. |
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| Keywords: | silt corrosion X70 steel pH electrochemical impedance spectroscopy (EIS) polarization curve scanning electron microscopy (SEM) |
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