| Since Cangzhou area isnear the Bohai Sea, the soil composition is complex. Thecorrosion of the earthing device in substations is serious, and the work of earth gridreformation and anti-corrosion increases every year .In order to investigate earth gridmaterial's corrosion in different soil, the systematic analyses of relation between earthgrid corrosion and earth grid materials is made in the paper, I selected 21 substationsthat located in 12kinds of soil as sample sites, the selected material included carbonsteel,galvanized steel,cathodic protection galvanized steel and copper,the investigatedobjects is in common. Through 10 lab analyses and ascertainment of 7 soil parameters, Igot the lab corrosion rates ,cavity corrosion depth etc. By means of analysis ,averagecorrosion rate and max cavity corrosion depth is obtained, so I gave my opinion aboutcorresponding design,reformation and anti-corrosion of earth grid,it is significant toelectric enterprise's safety production, also offers technique support for earth griddesign and reformation in future.
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