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

被引：209
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.
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页码：41 / 49
页数：9
相关论文
共 16 条
[1]   COMPOSITION OF THE NEAR-SURFACE REGIONS OF CONVERSION COATED ALUMINUM [J].
ASAMI, K ;
OKI, M ;
THOMPSON, GE ;
WOOD, GC ;
ASHWORTH, V .
ELECTROCHIMICA ACTA, 1987, 32 (02) :337-343
[2]   AN X-RAY ABSORPTION STUDY OF BARRIER-TYPE ANODIC FILMS FORMED ON ALUMINUM IN CHROMATE ELECTROLYTES [J].
CHUNG, SWM ;
ROBINSON, J ;
THOMPSON, GE ;
WOOD, GC ;
ISAACS, HS .
PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICS ELECTRONIC OPTICAL AND MAGNETIC PROPERTIES, 1991, 63 (02) :557-571
[3]  
CHUNG SWM, IN PRESS P S XRAY ME
[4]   X-RAY ABSORPTION STUDY OF CERIUM IN THE PASSIVE FILM ON ALUMINUM [J].
DAVENPORT, AJ ;
ISAACS, HS ;
KENDIG, MW .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1989, 136 (06) :1837-1838
[5]   XANES INVESTIGATION OF THE ROLE OF CERIUM COMPOUNDS AS CORROSION-INHIBITORS FOR ALUMINUM [J].
DAVENPORT, AJ ;
ISAACS, HS ;
KENDIG, MW .
CORROSION SCIENCE, 1991, 32 (5-6) :653-663
[6]   GLANCING ANGLE X-RAY STUDIES OF OXIDE-FILMS [J].
DAVENPORT, AJ ;
ISAACS, HS .
CORROSION SCIENCE, 1990, 31 (pt 1) :105-110
[7]  
DAVENPORT AJ, 1991, SURFACE INTERFACE CH
[8]   A RADIOANALYTICAL STUDY OF THE CHROMATE CONVERSION COATING FORMED ON ALUMINUM [J].
DROZDA, T ;
MALECZKI, E .
JOURNAL OF RADIOANALYTICAL AND NUCLEAR CHEMISTRY-LETTERS, 1985, 95 (06) :339-349
[9]   PHOTOREDUCTION OF HEXAVALENT CHROMIUM DURING X-RAY PHOTOELECTRON-SPECTROSCOPY ANALYSIS OF ELECTROCHEMICAL AND THERMAL FILMS [J].
HALADA, GP ;
CLAYTON, CR .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1991, 138 (10) :2921-2927
[10]   AN INVESTIGATION OF CHROMATE INHIBITORS ON ALUMINUM USING FLUORESCENCE DETECTION OF X-RAY ABSORPTION [J].
HAWKINS, JK ;
ISAACS, HS ;
HEALD, SM ;
TRANQUADA, J ;
THOMPSON, GE ;
WOOD, GC .
CORROSION SCIENCE, 1987, 27 (04) :391-399
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