Electrochemical behaviour of iron in neutral solutions of acetate and benzoate anions

被引：20

作者：

Azambuja, DS

Holzle, LR

Muller, IL

Piatnicki, CMS

机构：

[1] Univ Fed Rio Grande Sul, Inst Quim, BR-91501970 Porto Alegre, RS, Brazil

[2] Univ Fed Rio Grande Sul, Escola Engn, BR-91501970 Porto Alegre, RS, Brazil

来源：

CORROSION SCIENCE | 1999年 / 41卷 / 11期

关键词：

iron; anodic films; passive films; fitting corrosion;

D O I：

10.1016/S0010-938X(99)00033-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The electrochemical behaviour of iron in pH 6 aqueous solutions of benzoate and acetate anions mixed in varying concentrations and constant ionic strength was investigated. For that purpose cyclic voltammetric experiments were carried out at a disc electrode either static and/or rotating. A high surface coverage is observed in the presence of benzoate anions, thus favouring the establishment of a passive state. The overall process is discussed in terms of a three-dimensional film, the growth mechanism of which is under diffusion and migration control. It was also observed that the addition of chloride ions to the mixed electrolyte solutions containing increasing benzoate concentration shifts the breakdown potential and the repassivation potential toward more positive values. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：2083 / 2097

页数：15

共 35 条

[1] The electrochemical behaviour of Fe in acetate solution containing chloride [J].

Azambuja, DS ;

Muller, IL ;

Feris, LA ;

Ladeira, F ;

Ries, LS .

CORROSION SCIENCE, 1996, 38 (08) :1235-1244

[2] Investigation of the corrosion behaviour of iron in neutral media by using a microelectrode [J].

Azambuja, DS ;

Piatnicki, CMS ;

Muller, IL ;

Hölzle, LR .

ELECTROCHEMICAL METHODS IN CORROSION RESEARCH VI, PTS 1 AND 2, 1998, 289-2 :203-211

[3] THE INFLUENCE OF ACETATE CONCENTRATION ON THE DISSOLUTION OF IRON IN AQUEOUS-SOLUTIONS [J].

AZAMBUJA, DS ;

MULLER, IL .

CORROSION SCIENCE, 1994, 36 (11) :1835-1845

[4]

BARD AJ, 1980, ELECTROCHEMICAL METH, P291

[5]

BOCKRIS JOM, 1993, SURFACE ELECTROCHEM

[6]

BOHE AE, 1992, CORROS SCI, V34, P151

[7] THE EFFECTS OF ANIONS ON THE BEHAVIOR OF SCRATCHED IRON ELECTRODES IN AQUEOUS-SOLUTIONS [J].

BURSTEIN, GT ;

DAVIES, DH .

CORROSION SCIENCE, 1980, 20 (10) :1143-&

[8] The effect of specimen size on the measured fitting potential of stainless steel [J].

Burstein, GT ;

Ilevbare, GO .

CORROSION SCIENCE, 1996, 38 (12) :2257-2265

[9] POTENTIODYNAMIC CURRENT/POTENTIAL RELATIONS FOR FILM FORMATION UNDER OHMIC RESISTANCE CONTROL [J].

CALANDRA, AJ ;

DETACCONI, NR ;

PEREIRO, R ;

ARVIA, AJ .

ELECTROCHIMICA ACTA, 1974, 19 (12) :901-905

[10]

CASTRO MAC, 1979, CORROSION, V35, P560

← 1 2 3 4 →