摘要
土壤盐分与金属电极电位的变化王开军（中国科学院南京土壤研究所，南京２１０００８）１．试验材料与方法１．１试验材料选用１６锰钢、紫铜和工业纯铝，制成直径１６ｍｍ、厚５ｍｍ的圆试片，用５００＃和１２００＃金相砂纸打磨、无水洒精清洗，用滤纸吸干擦净后储于干...
Salt is a very important factor affecting soil corrosiveness.The relationship between salt content and electrode potentials of metals in soils has been studied.It was found that,the more the salt content of soil,the more negative the copper electrode potential,and the more positive the steel electrode potential.But it was very complicated for aluminum electrode potential. A metal in different soils could exhibit various POtentials, on the other hand,different metals also had different potentials in the same kind of soil.The orders,copper>steel>aluminum,could be got.A large potential difference between copper and steel or aluminum existed, but there was only a few difference in electrode potential between steel and aluminum. It is interesting that,the potential reverse of aluminum against steel happened in red soil without salt adding.In addition, the research on the variation of electrode potentials of metals in soils was also conducted.The fluctuations of potentials of steel and copper were not distinct within 216 hours at room temperature.However,the shift of aluminum potential was very significant.
出处
《腐蚀科学与防护技术》
CAS
CSCD
1994年第4期358-360,共3页
Corrosion Science and Protection Technology
