THE MECHANISM OF CORROSION INHIBITION BY CHROMATE CONVERSION COATINGS FROM X-RAY ABSORPTION NEAR EDGE SPECTROSCOPY (XANES)

被引：205

作者：

KENDIG, MW ^{[1
]}

DAVENPORT, AJ ^{[1
]}

ISAACS, HS ^{[1
]}

机构：

[1] BROOKHAVEN NATL LAB,DEPT APPL SCI,UPTON,NY 11973

来源：

CORROSION SCIENCE | 1993年 / 34卷 / 01期

关键词：

D O I：

10.1016/0010-938X(93)90257-H

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

X-Ray absorption spectra of chromate conversion coatings on Al 2024-T3 and 3003-H14 have been obtained as a function of processing time and environmental exposure. The spectra reveal the presence of a significant ratio of unreacted hexavalent chromium in the chromate conversion coatings which decays with the time of exposure in air-equilibrated 0.5 M NaCl. These results suggest that the unique corrosion-protective property of chromated Al lies in the presence of a source of the hexavalent chromium species as an active inhibiting species.

引用

页码：41 / 49

页数：9

共 16 条

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