Inhibition of chloride localized corrosion of mild steel by PO43-, CrO42-, and NO2- anions

被引：114

作者：

Refaey, SAM ^{[1
]}

Abd El-Rehim, SS

Taha, F

Saleh, MB

Ahmed, RA

机构：

[1] Minia Univ, Fac Sci, Dept Chem, Minia 61519, Egypt

[2] Ain Shams Univ, Fac Sci, Dept Chem, Cairo, Egypt

来源：

APPLIED SURFACE SCIENCE | 2000年 / 158卷 / 3-4期

关键词：

mild steel; localized corrosion; potentiodynamic; inorganic anions; inhibition;

D O I：

10.1016/S0169-4332(00)00016-7

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The effect of phosphate (PO43-), chromate (CrO42-), molybedate (Mo-4(2-)) and nitrite (NO2-) ions on the pitting corrosion of steel in 0.1 M NaCl solution has been studied using potentiodynamic polarization and SEM techniques. The addition of increasing concentrations of PO43-, CrO42-, MoO42- and NO2- anions causes a shift of the pitting potential (E-pit) in the positive direction, indicating the inhibitive effect of the added anions on the pitting attack. The adsorption characteristics of these anions on the steel surface play a significant role in the inhibition processes. The PO43--anion has a strong inhibitive effect of chloride pitting corrosion. The effect of different inorganic anions on the pitting corrosion of steel samples I and II (with different composition) was also studied in 0.1 M NaCl solution. (C) 2000 Elsevier Science B.V. All rights reserved.

引用

页码：190 / 196

页数：7

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