镀锌钢和不锈钢材料在不同pH土壤溶液中的腐蚀行为
Corrosion Behaviors of Galvanized Steel and Stainless Steel in Soil Solutions with Different pH Values
摘 要
使用比镀锌钢更耐腐蚀的接地极材料是保障电网安全的重要措施之一,采用电化学阻抗谱和表面分析技术考察了镀锌Q235钢和304不锈钢材料在不同pH土壤溶液中的腐蚀行为。结果表明,镀锌Q235钢和304不锈钢无论在弱酸性还是弱碱性土壤溶液中，随着浸泡时间的延长，阻抗都出现先上升后下降的趋势。从电极的阻抗模值｜Z｜0.05来看，304不锈钢的耐腐蚀性大约是镀锌Q235钢的10倍。304不锈钢因其优异的耐腐蚀性能，可能成为接地网复合材料的发展方向之一。
304不锈钢
土壤腐蚀
电化学阻抗谱
galvanized Q235 steel
304 stainless steel
soil corrosion
electrochemical impedance spectroscopy
Abstract
It is one of important steps to safeguard grid safety employing more corrosion-resistant metals than galvanized steel for ground conductors. The corrosion behaviors of carbon steel in the soil solutions with different pH values were studied by means of electrochemical impedance spectroscopy and surface analysis techniques. It is found that the impedance of both galvanized Q235 steel and 304 stainless steel in alkaline or acidic soil solutions increases at the early stage and then gradually declines during the immersion course. The anti-corrosion performance of stainless steel is about ten times that of carbon steel according to ｜Z｜0.05 value of modulus of impedance. 304 stainless steel is one of potential materials for grounding electrode based on its outstanding anti-corrosion performance.
中图分类号 TG174.2
所属栏目 试验研究
基金项目 国家电网公司科技项目(5226SX13044J)
收稿日期 2013/8/10
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备注闫爱军(1974-),高级工程师,博士,从事接地网腐蚀与防护研究工作,
引用该论文: YAN Ai-jun,WANG Hong-li,LIU Lei,LIAO Qiang-qiang. Corrosion Behaviors of Galvanized Steel and Stainless Steel in Soil Solutions with Different pH Values[J]. Corrosion & Protection, 2014, 35(6): 537
被引情况:
【1】聂凯斌,闫爱军,姚 瑶,邵玉佩,张心华,廖强强, "不锈钢包钢在红壤中的电偶腐蚀行为",腐蚀与防护 37, 639-643(2016)
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【3】李谋成,林海潮,曹楚南. 碳钢在土壤中腐蚀的电化学阻抗谱特征[J]. 中国腐蚀与防护学报,2000,20(2):111-117.
【4】KHAIED K F,HACKERMAN N. Ortho-substituted anilines to inhibit copper corrosion in aerated 0.5 M hydrochloric acid[J]. Electrochimica Acta,2004,49(3):485-495.
【5】GE H H,ZHOU G D,LIAO Q Q,et al. A study of anti-corrosion behavior of octadecylamine-treated iron samples[J]. Applied Surface Science,2000,156(1/4):39-46.
【6】葛红花,周国定,吴文权. 316不锈钢在模拟冷却水中的钝化模型[J]. 中国腐蚀与防护学报,2004,24(2):65-70.
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