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An aes and sims study of the influence of chloride on the passive oxide film on iron

✍ Scribed by R. Goetz; B. MacDougall; M.J. Graham

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
370 KB
Volume
31
Category
Article
ISSN
0013-4686

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✦ Synopsis

The kinetics of passivation of Fe in pH 8.4 borate buffer solution at 0.0 V have been studied in both the presence and absence of 0.5 M Cl-. Cl-has no influence on the decay of the passive current with time over the course of several hours. Oxide films were examined by AES and SIMS for possible Clincorporation into the oxide lattice. Neither technique was able to detect any Cl-within the film. The same is true even above the pitting potential, which probably indicates that Cl-incorporation into the oxide film is not a precursor to pit initiation. It also appears that Cl-does not cause any film thinning.

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