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The passivity and breakdown of passivity of 1018 carbon steel in dimethoxyethane with 0.5 M LiAsF6 was studied by electrochemical and surface analytical techniques. Carbon steel exhibits passivity over a large anodic potential range. Several different passivation mechanisms, including solvent adsorption, operate in this potential domain. In addition, another passivation mechanism involving electropolymerization of the solvent and complexation the LiAsF6 was observed. A polymer film did not form in supporting electrolytes other than LiAsF6. The effects of small amounts of water on the extent of the passive region and the possibility of polymer growth are discussed.
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Shifler et al. (1993) studied this question.
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