Electrochemical behaviour of iron in NaOH 0.01 mol/L solutions containing variable amounts of silicate

被引：8

作者：

Amaral, ST

Müller, IL

机构：

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

[2] Univ Fed Rio Grande Sul, Dept Met, BR-90035190 Porto Alegre, RS, Brazil

来源：

JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY | 1999年 / 10卷 / 03期

关键词：

iron; cyclic voltammetry; anodic films; passive films;

D O I：

10.1590/S0103-50531999000300010

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Repetitive voltammetric cycling of iron in NaOH solutions containing variable silicate concentrations between 10 ppm and 1500 ppm, shows different behaviour for the first scan when compared to the following ones in all studied solutions. This difference indicates a modification on the film formation process. A transition in the i/E profile between 10 ppm and 100 ppm of silicate was observed allowing considerations about silicate incorporation to be formulated.

引用

收藏

页码：214 / 221

页数：8

相关论文

共 48 条

[1] COMPARATIVE-STUDY OF THE PASSIVITY AND THE BREAKDOWN OF PASSIVITY OF POLYCRYSTALLINE IRON IN DIFFERENT ALKALINE-SOLUTIONS [J].

ALBANI, OA ;

GASSA, LM ;

ZERBINO, JO ;

VILCHE, JR ;

ARVIA, AJ .

ELECTROCHIMICA ACTA, 1990, 35 (09) :1437-1444

[2] A COMPARATIVE ELECTROCHEMICAL AND ELLIPSOMETRIC STUDY OF IRON ELECTRODES IN DIFFERENT ALKALINE ELECTROLYTES [J].

ALBANI, OA ;

ZERBINO, JO ;

VILCHE, JR ;

ARVIA, AJ .

ELECTROCHIMICA ACTA, 1986, 31 (11) :1403-1411

[3]

AMARAL ST, 1996, THESIS UFRGS BRASIL

[4]

ARMSTRONG RD, 1972, J ELECTROANAL CHEM, V40, P325, DOI 10.1016/S0022-0728(72)80377-2

[5] SPECTROSCOPIC OBSERVATIONS ON THE NATURE OF PASSIVITY [J].

BOCKRIS, JO .

CORROSION SCIENCE, 1989, 29 (2-3) :291-312

[6] THE FORMATION AND STABILITY OF HYDROUS OXIDE-FILMS ON IRON UNDER POTENTIAL CYCLING CONDITIONS IN AQUEOUS-SOLUTION AT HIGH PH [J].

BURKE, LD ;

LYONS, MEG .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1986, 198 (02) :347-368

[7] IRON DISSOLUTION AND PASSIVATION IN K2CO3-KHCO3 SOLUTIONS - ROTATING-RING-DISK ELECTRODE AND XPS STUDIES [J].

CASTRO, EB ;

VILCHE, JR ;

ARVIA, AJ .

CORROSION SCIENCE, 1991, 32 (01) :37-50

[8] THE INFLUENCE OF IONIC COMPOSITION ON THE ELECTRODISSOLUTION AND PASSIVATION OF IRON ELECTRODES IN POTASSIUM CARBONATE BICARBONATE SOLUTIONS IN THE 8.4-10.5 PH RANGE AT 25-DEGREES-C [J].

CASTRO, EB ;

VALENTINI, CR ;

MOINA, CA ;

VILCHE, JR ;

ARVIA, AJ .

CORROSION SCIENCE, 1986, 26 (10) :781-&

[9] HIGH-RESOLUTION IN-SITU XANES INVESTIGATION OF THE NATURE OF THE PASSIVE FILM ON IRON IN A PH 8.4 BORATE BUFFER [J].

DAVENPORT, AJ ;

SANSONE, M .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1995, 142 (03) :725-730

[10] IN-SITU XANES STUDY OF GALVANOSTATIC REDUCTION OF THE PASSIVE FILM ON IRON [J].

DAVENPORT, AJ ;

BARDWELL, JA ;

VITUS, CM .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1995, 142 (03) :721-724

← 1 2 3 4 5 →