Abstract
The corrosion behavior of a grounding material Q235 steel was investigated in an artificial acid soil made of diatomite. Steel coupons were buried for 15 d in the artificial soil with different water contents in a range 10% to 50%. The results indicated that the water content had a great effect on corrosion behavior of Q235 steel. The corrosion rate of the steel increased initially and then reduced with the increasing water content. General corrosion occurred for the steel in the soil with 10% water. With the increasing water content in the soil the corrosion of the steel changed to local corrosion. The steel exhibited the highest corrosion rate in a soil with 30% water. XRD analysis of the corrosion rust layer showed that the corrosion products were mainly composed of α-Fe OOH,γ-Fe OOH, Fe3O4 and Fe2O3,which were consistent well with those detected for the steel buried in actual fields.
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