Corrosion Cyclic Voltammetry of Two Types of Heat-Affected Zones (HAZs) of API-X100 Steel in Bicarbonate Solutions

被引：7

作者：

Eliyan, Faysal Fayez ^{[1
]}

Alfantazi, Akram ^{[1
]}

机构：

[1] Univ British Columbia, Dept Mat Engn, Corros Grp, Vancouver, BC V6T 1Z4, Canada

来源：

METALLURGICAL AND MATERIALS TRANSACTIONS B-PROCESS METALLURGY AND MATERIALS PROCESSING SCIENCE | 2014年 / 45卷 / 06期

关键词：

PIPELINE STEEL; ELECTROCHEMICAL-BEHAVIOR; AQUEOUS-SOLUTIONS; CARBON-STEEL; MILD-STEEL; TRANSPASSIVE DISSOLUTION; PITTING CORROSION; IRON ELECTRODES; CO2; CORROSION; CRACKING;

D O I：

10.1007/s11663-014-0153-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper examined the electrochemical corrosion behavior and corrosion products of two types of heat-affected HAZs made from API-X100 steel. Cyclic voltammetry, with different scan rates and potential ranges at 10 cycles, was applied to analyze the interdependent corrosion reactions of cathodic reduction, anodic dissolution, passivation, and transpassivation. The HAZ cooled at 60 K/s, from a peak temperature of 1470 K (1197 A degrees C) that was held for 15 seconds, exhibited better passivation and lower cathodic activity than the HAZ cooled at 10 K/s. Increasing bicarbonate concentration, from 0.05 and 0.2 to 0.6 M, increases the anodic activity and cathodic reduction, but accordingly protects the active surfaces and enhances passivation.

引用

页码：2464 / 2474

页数：11

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