EFFECTS OF NITRITE ANIONS ON SURFACE PASSIVE FILM PROPERTIES FOR Q235 CARBON STEELS
EFFECTS OF NITRITE ANIONS ON SURFACE PASSIVE FILM PROPERTIES FOR Q235 CARBON STEELS
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DOI：
10.1142/s0218625x18502189
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发表时间：
2019-08
影响因子：
1.1
通讯作者：
Yong Zhou;Huiju Huang;Pei Zhang;Dong Liu;Fuan Yan
中科院分区：
文献类型：
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作者：
Yong Zhou;Huiju Huang;Pei Zhang;Dong Liu;Fuan Yan
本文研究了Q235碳钢在不同NO浓度的NaNO 2溶液中，在Q235表面形成以Fe 2 O3为主的钝化膜，并通过电化学方法和微观结构分析研究了NO浓度对钝化膜性能的影响。采用电化学阻抗谱（EIS）、Mott-Schottky（MS）曲线、扫描电子显微镜（SEM）和X射线光电子能谱（XPS）对钝化膜的电阻、缺陷、形貌和成分进行了表征。钝化膜电阻和缺陷分别随着NO[公式：见正文]浓度的增加而增加和减少，直到NO[公式：见正文]浓度达到0.01[公式：见正文]M，这是Q235表面稳定钝化的临界NO[公式：见正文]浓度。并详细讨论了钝化膜与电化学行为的关系。
In this paper, for Q235 carbon steels in NaNO2 solutions with different concentrations of NO[Formula: see text], a passive film composed of mainly Fe2O3 was formed on the Q235 surface, and the effects of NO[Formula: see text] concentrations on the properties of passive film were studied by electrochemical methods and microstructural analyses. The applications of electrochemical impedance spectroscopy (EIS), Mott–Schottky (MS) plot, scanning electron microscope (SEM) and X-ray photoelectron spectroscope (XPS) were carried out to characterize the resistance, defect, morphology and composition of passive film, respectively. The passive film resistance and defect, respectively, increased and decreased with the increase of NO[Formula: see text] concentration until the NO[Formula: see text] concentration was up to 0.01[Formula: see text]M, which was the critical NO[Formula: see text] concentration of stable passivation for the Q235 surface. The relation between the electrochemical behavior and the passive film was also discussed in detail.