【摘要】 用电化学法研究了纯镁在未除氧和除氧的下不同厚度薄液膜下的腐蚀行为.结果表明:薄液膜下纯镁腐蚀的阴极过程受氢还原控制;液膜厚度的减小使其阴极过程和阳极过程都受到抑制,对阳极过程影响很大.氧气的存在对阳极过程的影响很大,并使得纯镁表面易于生成表面膜,表面膜更加连续和致密.更多还原

【Abstract】 Corrosion behavior of pure magnesium was investigated by means of cathodic polarization curve and electrochemical impedance spectroscopy(EIS)under aerated and deaerated thin electrolyte films(TEF)with various thicknesses.The experimental results revealed that the cathodic process of pure magnesium under thin electrolyte film was dominated by hydrogen reduction.With decreasing thickness of the thin electrolyte film,cathodic process was retarded slightly while the anodic process was inhibited significantly.It was easier to form a continuous and compact scale on the surface of pure magnesium with the presence of oxygen in the thin electrolyte film which has remarkable effect on the anodic process but little on the cathodic process.更多还原