大气腐蚀是电化学腐蚀之一种特殊形态,现在已经可以认为是确定的了。它和其他电化学腐蚀之不同,僅在於它的腐蚀过程,不是在大量电解液中,而是在一层很薄的电解液膜下进行的。这电解液薄膜的生成,是由於金属表面上湿气的吸附或冷凝,并在其中溶入了各种气体、蒸汽、酸和盐等而生成的。既然大氛腐蚀的本质是属於电化学腐蚀,那末,用电化学方法的研究应该可以找出腐蚀的过 Atmospheric corrosion is a special form of electrochemical corrosion that is now considered to be definite. It is different from other electrochemical corrosion only in its corrosive process, not in a large amount of electrolyte, but in a thin film of electrolyte. The formation of the electrolyte film is caused by the adsorption or condensation of moisture on the metal surface and incorporation of various gases, vapors, acids and salts therein. Since the nature of large-scale corrosion is electrochemical corrosion, then electrochemical methods should be able to find out the corrosion