Investigating the corrosion of the Heat-Affected Zones (HAZs) of API-X70 pipeline steels in aerated carbonate solution by electrochemical methods

被引：44

作者：

Khalaj, Gholamreza ^{[1
]}

Khalaj, Mohammad-Javad ^{[1
]}

机构：

[1] Islamic Azad Univ, Saveh Branch, Young Researchers & Elites Club, Saveh, Iran

来源：

INTERNATIONAL JOURNAL OF PRESSURE VESSELS AND PIPING | 2016年 / 145卷

关键词：

Electrochemical polarization; Microalloyed steel; Welding; Alkaline corrosion; CARBONATE/BICARBONATE SOLUTION; BICARBONATE SOLUTIONS; CHEMICAL-COMPOSITION; CELL CHARACTERISTICS; CURRENT-DENSITY; MICROSTRUCTURE; BEHAVIOR; CRACKING;

D O I：

10.1016/j.ijpvp.2016.06.001

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electrochemical investigations were carried out to link between the quantities of selected micro structural features, of the weld metal, near-fusion, coarse grain and fine grain HAZs, and their corrosion behavior. The weld and HAZs were made of API-X70 steels by the longitudinally submerged-arc welding process. The electrochemical tests were the potentiodynamic polarization and electrochemical impedance spectroscopy. They were used to evaluate the cathodic reduction, corrosion kinetics, dissolution, the passivation process, and the stability of the passive films - in comparison to the base API-X70 steels - in naturally-aerated solutions containing 0.5 M bicarbonate and 0.01 wt% chloride at 25 degrees C. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：1 / 12

页数：12

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