Effect of lead and applied potential on corrosion of carbon steel in steam generator crevice solutions

被引：10

作者：

Bojinov, Martin ^{[1
]}

Jappinen, Essi ^{[2
]}

Saario, Timo ^{[2
]}

Sipila, Konsta ^{[2
]}

Toivonen, Aki ^{[2
]}

机构：

[1] Univ Chem Technol & Met, Dept Phys Chem, BU-1756 Sofia, Bulgaria

[2] VTT Tech Res Ctr Finland Ltd, POB 1000, FIN-02044 Espoo, Finland

来源：

CORROSION SCIENCE | 2019年 / 159卷

关键词：

Carbon steel; Steam generator; General corrosion; Stress-corrosion cracking; Electrochemical impedance spectroscopy; INDUCED PASSIVITY-DEGRADATION; 600 SG TUBE; BORIDE INHIBITORS; SURFACE OXIDE; TUBING ALLOY; BASE ALLOYS; NI; CRACKING; PBSCC; FILM;

D O I：

10.1016/j.corsci.2019.108117

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

General corrosion behavior and stress corrosion cracking (SCC) susceptibility of carbon steel in simulated steam generator crevices are probed by voltammetry and electrochemical impedance spectroscopy, coupled to ex-situ characterization of the formed oxides and slow strain rate tests. Impedance spectra are interpreted using the Mixed-Conduction Model allowing for the extraction of oxidation and corrosion release rates. The results indicate a beneficial effect of lead on both general corrosion and SCC susceptibility of carbon steel near the corrosion potential. At anodic potentials, the negative effect of Pb on localized corrosion susceptibility is secondary to that of the applied potential.

引用

页数：12

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