电化学2011，Vol.17Issue(3)：329-333,5.
镀锌扁钢电力接地材料在NaCl介质中的腐蚀特性
Corrosion Characteristics of Galvanized Flat Steel for Power Grounding in NaCl Medium
摘要
Abstract
The corrosion behavior of power grounding galvanized flat steel was studied by polarization measurements,electrochemical impedance spectroscopy technique and neutral salt spray test in 5%NaCl solution.The surface morphologies of galvanized coating and structural properties of corrosion products were observed with scanning electron microscope and X-ray diffraction spectrometer,respectively.Results showed that under the temperatures of 20~60 ℃,the corrosion currents of galvanized flat steel increased with the temperature rising.The corrosion rate at 60 ℃ was 0.8408 mA·cm-2,which is 2.9 times larger than that at 20 ℃.The corrosion rate droped after reaching the maximal value of 1.95 mg·cm-2·d-1 when the exposure time was 60 d.The major corrosion form of galvanized coating was pitting corrosion,then some corrosion pits was converted into etch pits.Main corrosion products of white rust were ZnO and Zn5（OH）8Cl2·H2O,while those of red rust were Fe＋3OOH and Fe3O4 with a small amount of Zn5（OH）8Cl2·H2O being also detected.关键词
电力接地材料/镀锌扁钢/腐蚀/中性盐雾腐蚀试验Key words
grounding materials/galvanized flat steel/corrosion/neutral salt spray test分类
矿业与冶金引用本文复制引用
李勇,吴高林,邓帮飞,杨萍,黎学明,宗庆彬..镀锌扁钢电力接地材料在NaCl介质中的腐蚀特性[J].电化学,2011,17(3):329-333,5.基金项目
重庆市电力公司重点科技项目 （）
重庆市交通委员会科技计划项目 （）
重庆市自然科学基金（2004BB6065）资助 （）
