摘要
用动电势扫描和交流阻抗方法研究纯铁在0.05mol/l H_2SO_4+0.1mol/l NaNO_3和0.05mol/lH_2SO_4+0.1mol/l NaNO_3+0.01mol/l NaCl溶液体系中的电化学行为。讨论了在酸性介质中,在阳极钝化的电势范围内,NO_3^-可抑制Cl^-对Fe表面的孔蚀作用;当[NO_3^-]》[Cl^-]时,在上述电势范围内Fe表面呈钝化态。
The potentiodynamic sweep and A. C. impedance methods were used to study the electrochemical behavior for the pure iron in 0.05mol/l H2SO4+0.1mol/l NaNO3 and 0.05mol/l H2SO4 + 0.1 mol/l NaNO3+ 0.01mol/l NaCl solution systems. In acidic medium, NO3- inhibits pitting effects of Cl- on iron surface in the potential region of anodic passivation. If [NO-3]>>[Cl-], the passive state is established on the iron surface in the above-mentioned potential range.
出处
《北京大学学报（自然科学版）》
CAS
CSCD
北大核心
1991年第2期177-183,共7页
Acta Scientiarum Naturalium Universitatis Pekinensis
基金
国家自然科学基金
关键词
铁
钝化
孔蚀
氯离子
硝酸
钝化膜
Iron
Nitricacid
CI-ion
Passive film
Pitting
