Inhibition of filiform corrosion on polymer coated AA2024-T3 by hydrotalcite-like pigments incorporating organic anions

被引：100

作者：

Williams, G ^{[1
]}

McMurray, HN ^{[1
]}

机构：

[1] Univ Wales Swansea, Sch Engn, Mat Res Ctr, Swansea SA2 8PP, W Glam, Wales

来源：

ELECTROCHEMICAL AND SOLID STATE LETTERS | 2004年 / 7卷 / 05期

关键词：

D O I：

10.1149/1.1691529

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

Benzotriazolate, ethyl xanthate, and oxalate anion-exchanged hydrotalcite (HT) pigments are evaluated with respect to their ability to inhibit filiform corrosion (FFC) on organic coated AA2024-T3 aluminum alloy. Following FFC initiation by application of aqueous HCl to a penetrative coating defect, the time-dependent extent of coating delamination was determined both optically and by repeated in situ measurements performed using a scanning Kelvin probe (SKP). Inhibitor efficiency is shown to increase in the order ethyl xanthate << oxalate < benzotriazolate. Benzotriazolate is also shown to interact specifically with the alloy surface, depressing Volta potential values by up to 0.4 V. (c) 2004 The Electrochemical Society.

引用

页码：B13 / B15

页数：3

共 31 条

[1] Corrosion of copper in BTA solutions - Effects of passive film removal [J].

Al-Hinai, AT ;

Osseo-Asare, K .

ELECTROCHEMICAL AND SOLID STATE LETTERS, 2003, 6 (05) :B23-B24

[2] Active corrosion protection and corrosion sensing in chromate-free organic coatings [J].

Buchheit, RG ;

Guan, H ;

Mahajanam, S ;

Wong, F .

PROGRESS IN ORGANIC COATINGS, 2003, 47 (3-4) :174-182

[3] Local dissolution phenomena associated with S phase (Al2CuMg) particles in aluminum alloy 2024-T3 [J].

Buchheit, RG ;

Grant, RP ;

Hlava, PF ;

Mckenzie, B ;

Zender, GL .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1997, 144 (08) :2621-2628

[4] Comparative study of inhibition effects of benzotriazole for metals in neutral solutions as observed with surface-enhanced Raman spectroscopy [J].

Cao, PG ;

Yao, JL ;

Zheng, JW ;

Gu, RA ;

Tian, ZQ .

LANGMUIR, 2002, 18 (01) :100-104

[5]

Cotton J. B., 1967, BR CORROS J, V2, P1

[6] Dealloying of Al2CuMg in alkaline media [J].

Dimitrov, N ;

Mann, JA ;

Vukmirovic, M ;

Sieradzki, K .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 2000, 147 (09) :3283-3285

[7]

Dugdale I., 1963, Corros. Sci., V3, P69, DOI [10.1016/S0010-938X(63)80001-3, DOI 10.1016/S0010-938X(63)80001-3]

[8] THE ULTRAVIOLET ABSORPTION OF BENZOTRIAZOLE [J].

FAGEL, JE ;

EWING, GW .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1951, 73 (09) :4360-4362

[9] SYNERGISTIC EFFECTS IN THE INHIBITION OF COPPER CORROSION [J].

GONZALEZ, S ;

LAZ, MM ;

SOUTO, RM ;

SALVAREZZA, RC ;

ARVIA, AJ .

CORROSION, 1993, 49 (06) :450-456

[10] Corrosion protection by organic coatings: electrochemical mechanism and novel methods of investigation [J].

Grundmeier, G ;

Schmidt, W ;

Stratmann, M .

ELECTROCHIMICA ACTA, 2000, 45 (15-16) :2515-2533

← 1 2 3 4 →