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Chemical characterization of passive films formed on AISI 304 austenitic stainless steel, in a borate/boric acid solution at pH 9.2, under various conditions of potential, temperature, and polarization time, was made by Auger electron spectroscopy combined with ion sputtering, and x‐ray photoelectron spectroscopy (XPS). The depth chemical composition, thickness, and duplex character of the passive layers were determined after processing AES sputter profiles by our quantitative approach based on the sequential layer sputtering model. Moreover, separated contributions of elements in their oxidized and unoxidized state could be disclosed from part to part of the oxide‐alloy interface. The XPS study specified the chemical bondings which take place inside the film, between Fe and oxygen (and water).
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Lorang et al. (1994) studied this question.
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