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中国电机工程学报 2006, 26(3) 86-90 DOI:
ISSN: 0258-8013 CN: 11-2107/TM |
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| 电工电机 |
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合成绝缘子端部金具的缝隙腐蚀研究 |
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张大全 车德竞 张万友 梁磊 |
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上海电力学院环境工程系 东北电力学院应用化学系 东北电力学院应用化学系 上海电力学院环境工程系 |
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摘要：
用模拟合成绝缘子端部金具的缝隙腐蚀装置，在氯离子含量195mg/L的溶液中，研究了镀锌板在自腐蚀状态和极化状态下，其缝内溶液pH值随时间的变化。结果表明，自腐蚀状态下，缝内溶液pH值最低达5.35，在-0.557V阳极极化状态下，缝内溶液pH值最低达2.9。通过模拟缝隙腐蚀溶液中浸泡实验研究，发现芯棒中的玻纤呈现明显的断裂特征。这表明合成绝缘子连接面密封失效而造成金具的缝隙腐蚀能导致局部环境介质pH值下降，可能是导致芯棒酸蚀脆断的原因之一。 |
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关键词：
合成绝缘子
金具
缝隙腐蚀
脆断
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Study on Crevice Corrosion of End-fitted Metallic Hardware of Composite Insulator |
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ZHANG Da-quan CHE De-jing ZHANG Wan-you LIANG Lei |
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Abstract:
A simulated crevice corrosion device of hot galvanized steel plate is employed to investigate the corrosion of end-fitted metallic hardware of composite insulator. The distribution and change of pH values in crevice solution containing 195mg/L Cl- are measured under anodic polarization and non-polarization condition. It showes that pH value in crevice solution is gradually declined for both conditions. The lowest pH value is 2.9 with polarization at -0.557V and 5.35 without polarization. The structure change of glass fiber in the rod is studied by the acidic erosion experiment. It showes that the glass fiber is fractured after impregnated in stimulated crevice corrosion solution of pH value 6.56. It can be deduced that the corrosion of end-fitted metallic hardware is one of the acidic resource which leads to fracture of the core in composite insulator. |
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Keywords:
Composite insulator
Metallic hardware
Crevice corrosion
Fracture
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收稿日期 2005-03-10 修回日期 1900-01-01 网络版发布日期 |
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DOI: |
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基金项目:
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通讯作者: 张大全 |
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作者简介: |
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