EFFECT OF EXCHANGEABLE IONS AND TOTAL ACIDITY ON CORROSION OF MILD STEEL IN ACIDIC SOIL

Effect of exchangable total acidity,H + and aluminum in acidic soil on corrosion of A3 steel is studied.The results show that acidic soil at Shenzhen area shows a buffering performance to a certain extent and the addition of acid to the soil has little influence on its pH value.What's more,with increasing of pH of the acid,the content of exchangable total acidity,H + and aluminum decreases,at the same time corrosion rate increases.When the pH value of soil is 4,the reaction process of the cathode from oxygen discharging,transforms in to hydrogen discharging.