STUDY ON THE RELATIONSHIP BETWEEN THE CORROSION INTERFACE STRUCTURE AND NEGATIVE DIFFERENCE EFFECT FOR PURE MAGNISUIM
金属镁在腐蚀介质中界面结构特征与负差数据效应关系研究

The negative difference effect(NDE) phenomenon of magnesium has been studied by electrochemical measurement and STM. After observing the morphology characteristics on magnesium by STM in nanoscale, the newPartially Protective Film mechanism is proposed to explain the NDE phenomena. There were many oxide pieces which did not bulk up on the magnesium surface and the magnesium would be dissolved under the defect of oxide pieces when the anodic potential or current were applied on the electrode. It was shown that the possibility and the degree of NDE were decided by the structure of oxide on the magnesium electrode.\=