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纯铝在空气中表面上会生成致密的钝化膜,浸入氯化钠溶液中后这层氧化膜仍有较高的稳定性,使铝难于活化。但在纯铝中加入少量合金元素,如Zn、In、Sn、Hg、Si等,能显著改变纯铝的阳极溶解性能。从这个事实出发制成的铝合金牺牲阳极目前已广泛应用于船舶、码头及近海采油平台等各类钢结构件的电化学阴极保护,并制订了相应的国家标准。国外近十年来已开展了铝合金牺牲阳极溶解机理,尤其是合金元素对阳极活化溶解作用的研究工作。本文作
Pure aluminum in the air will generate a dense surface of the passive film, immersed in sodium chloride solution after the oxide film is still a high stability, so difficult to activate aluminum. However, adding a small amount of alloying elements such as Zn, In, Sn, Hg, Si, etc. in pure aluminum can significantly change the anodic dissolution properties of pure aluminum. The aluminum alloy sacrificial anode made from this fact has been widely applied to the electrochemical cathodic protection of all kinds of steel structures such as ships, wharfs and offshore oil platforms and has formulated corresponding national standards. Almost 10 years abroad, aluminum alloy sacrificial anodic dissolution mechanism has been carried out, especially the research of alloying elements on anodic activation and dissolution. This article as