The mechanism of corrosion inhibition by chromate conversion coatings from x-ray absorption near edge spectroscopy (Xanes)

M. W. Kendig; A. J. Davenport; H. S. Isaacs

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

The mechanism of corrosion inhibition by chromate conversion coatings from x-ray absorption near edge spectroscopy (Xanes)

M. W. Kendig^*, A. J. Davenport, H. S. Isaacs

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

209 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	41-49
Number of pages	9
Journal	Corrosion Science
Volume	34
Issue number	1
DOIs	https://doi.org/10.1016/0010-938X(93)90257-H
Publication status	Published - 1993
Externally published	Yes

ASJC Scopus subject areas

General Materials Science
Metals and Alloys

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

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abstract = "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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AU - Davenport, A. J.

AU - Isaacs, H. S.

PY - 1993

Y1 - 1993

N2 - 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.

AB - 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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The mechanism of corrosion inhibition by chromate conversion coatings from x-ray absorption near edge spectroscopy (Xanes)

Abstract

ASJC Scopus subject areas

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