接地是确保电力系统和电气设备安全运行，确保运行人员人身安全的重要措施，石化行业接地包括工作( 系统) 接地、保护接地、防雷防静电接地和阴极保护接地。近年来，随着石油化工厂规模扩大，其用电容量增加、电压等级提高，因接地网腐蚀而引发的运行和安全事故时有发生。

但接地装置作为隐蔽工程的一部分，目前除了开挖检查以外，尚不能做到对埋设于地下的接地材料实际腐蚀情况进行准确调查，在对已运行工艺装置进行年度例检中只能测量接地电阻，对接地材料的截面缺少全面评价措施，导致相关人员对接地材料腐蚀问题认识不足。

长期以来石化行业主要以镀锌钢作为接地材料，由于碳钢在土壤中发生腐蚀的速率较大，且镀锌层对接地网的保护有限，因此工程设计人员一直在探索寻找新型抗腐蚀接地材料，部分工厂开始尝试采用铜包钢接地材料代替镀锌钢，但使用过程中存在着一定的盲目性。

Grounding is an important measure to ensure the safe operation of power system and electrical equipment and the personal safety of operators. Grounding in petrochemical industry includes working (system) grounding, protective grounding, lightning and anti-static grounding and cathodic protection grounding. In recent years, with the expansion of the scale of petrochemical plants, their power consumption capacity and voltage level have increased. Operation and safety accidents caused by grounding grid corrosion have occurred from time to time.

However, as a part of concealed works, the grounding device can not accurately investigate the actual corrosion of grounding materials buried underground except for excavation inspection. In the annual routine inspection of operating process devices, only the grounding resistance can be measured, and there is a lack of comprehensive evaluation measures for the section of grounding materials, resulting in insufficient understanding of the corrosion of grounding materials by relevant personnel.

For a long time, the petrochemical industry mainly uses galvanized steel as the grounding material. Due to the large corrosion rate of carbon steel in the soil and the limited protection of galvanized layer to the grounding grid, engineering designers have been exploring and looking for new anti-corrosion grounding materials. Some factories began to try to use copper-clad steel grounding materials instead of galvanized steel, but there is a certain blindness in the use process.