【摘要】 本文用电化学和光电化学方法研究了在硼酸/硼酸钠溶液中铁钝化膜厚度和成膜电位的关系。指出铁钝化膜由两层氧化物组成,内层为具有导电体性质的Fe₃O₄,外层为具有半导体性质的Fe₂O₃,在钝化区的电位范围内,内层Fe₃O₄的厚度和成膜电位无关,而外层Fe₂O₃的厚度和成膜电位成正比关系。更多还原

【Abstract】 The thickness of the passive film on iron formed in pH=8.4 boric acid/borate solution has been measured by the electro-chemical and the photoelectrochemical methods. The dependence of the thickness of the iron passive film on the filmforming potential has been discussed. Resultr indicated that iron passive film consists of an inoer Fe₃O₄ and an outer Fe₂O₃ layer at the passive potential region, the thickness of inner Fe₃O₄ layer is not affected by the film-forming potential φ and the thickness of outer Fe₂O₃ layer is proportional to the film-forming potential φ.更多还原