THE INFLUENCE OF CHLORINATION OF SALINE ENVIRONMENTS ON LOCALIZED CORROSION OF STAINLESS-STEELS

被引：6

作者：

LU, YC

LUO, JL

IVES, MB

机构：

[1] Institute for Materials Research, McMaster University, Hamilton, Ontario

来源：

ISIJ INTERNATIONAL | 1991年 / 31卷 / 02期

关键词：

AUSTENITIC STAINLESS STEELS; CHLORINATION; PITTING; MICROELECTRODES;

D O I：

10.2355/isijinternational.31.210

中图分类号：

TF [冶金工业];

学科分类号：

0806 ;

摘要：

The effects of chlorination on the localized corrosion of stainless steel in saline environments have been studied by probing the detailed electrochemical environments within growing pits formed on UNS S30100, using micro-electrodes to determine the local pH, chloride ion concentration and potential. In chlorinated systems, the reduction of free chlorine is the major cathodic electrode process. The strong reduction tendency of the free chlorine species increases the free corrosion potential of a steel. A model of chlorination-enhanced localized corrosion of stainless steels is proposed, wherein the growth of pits and crevices is influenced by the reduction of chlorine oxidant stimulated by the low local pH associated with sites of localized attack.

引用

页码：210 / 215

页数：6

共 20 条

[1]

GUO R, 1989, CORROSION, V45, P874

[2]

Hakkarainen T. J., 1987, CORROSION CHEM PITS, P17

[3]

Holroyd N.J.H., 1987, CORROSION CHEM PITS, P495

[4] THE LOCALIZED BREAKDOWN AND REPAIR OF PASSIVE SURFACES DURING PITTING [J].