土壤中的防雷接地装置防腐问题研究

Study on Corrosion Prevention Measures for Lightning Earth-termination System in the Soil

在雷电防护中,接地相当重要,接地装置的优劣直接决定了防雷装置的避雷效果。若接地处理不好,其他的技术措施就失去了支持。本文通过对土壤中的接地装置腐蚀机理、腐蚀类型以及影响接地体腐蚀因素的探讨,提出加大接地截面和对接地极表面镀锌法、采用铜及其他耐腐蚀的金属作接地材料法、采用降阻防腐法、在接地极表面采用复合多重的防腐材料法、采用"牺牲阳极、阴极保护"法以及调节土壤的酸碱度、含盐量、换土等多种防腐措施,以减少土壤对接地装置的腐蚀。

Lightning earth-termination system plays an important role in lightning protection technologies,it decides the protection effectiveness of lightning protection system. If grounding is not properly handled ,the other lightning protections has already lost its original effectiveness. In this paper, by analyzing the corrosion mechanism, corrosion forms and corrosion influencing factors of lightning earth-termination system, different corrosion prevention measures were proposed, such as increasing interface of the earth electrode, plating of earth electrode could be zinc, using the corrosion- resistant metals as the earth electrode such as copper,using the corrosion resistance reduction agent ,using the method of cathodic protection of sacrificial anode, changing soil, and adjusting the pH and salinity of soil ,which meant to reduce the corrosive action on lightning earth-termination system by the soil.