Effect of Stray Current on Corrosion Resistance of Grounding Grid Materials at Substation

The effect of AC/DC stray current on corrosion resistance of grounding grid materials was studied by applying AC/DC to simulating the stray current at substation.The results showed that the effect of DC stray current on corrosion resistance was much greater than the effect of AC stray current.Effect of DC stray current was essentially proportional to soil conductivity and had unobvious correlation with pH of soil;Effect of AC stray current had unobvious correlation with pH and conductivity of soil.