不同接地材料在降阻剂土壤环境下的腐蚀行为

Corrosion behavior of different grounding materials in soil environments with resistance-reducing agents

摘要

[目的] 对比研究镀锌钢、铜包钢、铜、20 钢、铠装石墨烯合金接地材料和导电高分子基复合接地材料在含降阻剂的土壤环境中的耐蚀性。[方法] 通过宏观形貌观察、腐蚀速率测试、电化学阻抗谱测量等方法，分析不同接地材料在不同石墨含量的降阻剂土壤环境中的腐蚀行为。[结果] 上述 6 种接地材料在降阻剂土壤环境中的腐蚀速率排序为：导电高分子基复合接地材料 < 紫铜 < 铜包钢 < 铠装石墨烯合金接地材料 < 镀锌钢 < 20 钢。[结论] 导电高分子基复合接地材料在加了降阻剂的土壤中界面电阻大大降低，且保持优异的耐腐蚀性能，腐蚀速率远低于其他接地材料。

Abstract

[Objective] To compare the corrosion resistance of galvanized steel, copper-clad steel, copper, 20 steel, armored graphene alloy grounding material, and conductive polymer-based composite grounding material in soil environments containing a resistance-reducing agent. [Method] The corrosion behavior of different grounding materials in soil containing the resistance-reducing agents with various graphite contents was analyzed through macroscopic morphology observation, corrosion rate testing, and electrochemical impedance spectroscopy. [Result] The corrosion rates of the six grounding materials in the soil environment containing the resistance-reducing agent ranked from lowest to highest as follows: conductive polymer-based composite grounding material < copper < copper-clad steel < armored graphene alloy grounding material < galvanized steel < 20 steel. [Conclusion] The conductive polymer-based composite grounding material exhibits significantly reduced interfacial resistance in soil added with a resistance-reducing agent while maintaining excellent corrosion resistance. Its corrosion rate is much lower than that of the other grounding materials.

关键词

接地材料 / 导电高分子基复合材料 / 降阻剂 / 土壤腐蚀

Key words

grounding material / conductive polymer-based composite / resistance-reducing agent / soil corrosion

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基金资助

南方电网公司科技项目“基于分级评估的电力设备全生命周期腐蚀治理技术研究及规模示范应用”(GDKJXM20231560)