研究了交换性酸度总量、交换性H+、交换性铝对A3钢在酸性土壤中的腐蚀影响.结果 表明：深圳土作为酸性土，它的缓冲性能很强，加不同pH的硝酸，对其pH值影响不大； 随硝酸的pH的增加，交换性铝、交换性酸度总量、交换性H+有相对减小的趋势，腐蚀速 率增大.当土壤pH约为4时，阴极过程发生变化，由氧放电转为氢放电.
Effect of exchangable total acidity,H+ and aluminu m in acidic soil on corrosion of A3 steel is studied.The results show that acidi c soil at Shenzhen area shows a buffering performance to a certain extent and t he 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 va lue of soil is 4,the reaction process of the cathode from oxygen discharging,tra nsforms in to hydrogen discharging.
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