一、形成氧化膜之条件使用于现代机器制造上的全部金属与合金,几乎都具有在自己表面上形成氧化物的性能。这种自然腐蚀过程,能在表面上生成更稳定的化合物;是即在金属表面上产生了一层氧化膜,这层氧化膜似乎可以防止金属本体进一步的损坏。可是在零件表面上自然形成的氧化膜,并不能确切地防止腐蚀,反而曾使零件之腐蚀加剧,以致零件损坏。为了阐明质地良好之氧化膜之生成机构起见,应该确定一下为什么在金属表面上自然形成之氧化膜不能防止金属腐蚀之原因。首先,自然的氧化膜,在全部金属表面不是同 First, the formation of oxide film conditions Used in the modern machinery manufacturing all the metals and alloys, almost all have their own surface oxide formation. This natural erosion process produces more stable compounds on the surface; that is, an oxide film is created on the metal surface that appears to prevent further damage to the metal body. However, the oxide film formed naturally on the surface of the part does not exactly prevent the corrosion. Instead, the corrosion of the part is exacerbated and the part is damaged. In order to clarify the good texture of the oxide film forming mechanism, it should be determined why the oxide film naturally formed on the metal surface does not prevent metal corrosion. First, the natural oxide film is not the same on all metal surfaces