2000 W. R. Whitney Award Lecture: Visualizing corrosion

被引：47

作者：

Isaacs, HS ^{[1
]}

Adzic, G

Jeffcoate, CS

机构：

[1] Brookhaven Natl Lab, Upton, NY 11973 USA

[2] Ohio State Univ, Dept Mat Sci & Engn, Columbus, OH 43210 USA

来源：

CORROSION | 2000年 / 56卷 / 10期

关键词：

AA100; AA2024; AA5052; AA7075; aluminum; chloride; localized corrosion; pH;

D O I：

10.5006/1.3294386

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using a broad-range pH indicator, the corrosion of At and At alloys in chloride-containing agar gels was studied. Distinct changes in pH were observed at low-PH anodic sites and at high-pH cathodes. There was a definite edge effect that occurred when gels were placed directly on the metal, which dominated the pattern of corrosion. Wet-abraded surfaces initially showed a general type of corrosion, whereas dry-abraded surfaces showed localized corrosion under the get. Pure At, AA1100 (UNS A91110), AA2024 (UNS A92024), and AA5052 (UNS A95052) all showed pitting in contact with agar gels when the edge effect was prevented. Abraded AA7075 (UNS A97075) exhibited a filiform type of corrosion caused by high concentrations of corrosion product initiating corrosion ahead of the growing site.

引用

页码：971 / 978

页数：8

共 17 条

[1]

ADLYKIEWICZ AJ, 1995, J ELECTROCHEM SOC, V142, P3342

[2] Detection of localized corrosion of aluminum alloys using fluorescence microscopy [J].