The composition and properties of oxide films on type 304 stainless steel on exposure to lithiated water at 100–350°C

doi:10.1016/0010-938X(91)90110-B

Corrosion Science

Volume 32, Issues 5–6, 1991, Pages 609-619

https://doi.org/10.1016/0010-938X(91)90110-B Get rights and content

Abstract

The oxide films formed on type 304 stainless steel in lithiated water containing dissolved hydrogen were examined at constant temperatures of 100, 150, 200, 250, 300 and 350°C by open circuit potential measurements, Auger electron spectroscopy analyses, semiconductivity measurements and a.c. impedance experiments. Between 150 and 200°C, most of the properties examined were found to change drastically. The steady state open circuit potential was close to that of the reversible hydrogen electrode (RHE), and the measured current density corresponded to the exchange current density of RHE.

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An obvious interface between the oxide particle and the inner continuous layer was acknowledged, suggesting that the oxide particle did not grow epitaxially on the continuous layer. This may imply that the oxide particle was formed by a dissolution-precipitation process of Fe and Ni cations, which had been proposed by other researchers [1,53]. In Fig. 3D, due to the oxidation of high-temperature high-pressure water, the internal oxide film intersperses with small particles, which is consistent with previous analysis and published data [4].
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Effect of irradiation on corrosion of 304 nuclear grade stainless steel in simulated PWR primary water
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These loops are preferential sites for nucleation of the oxide particles in the outer layer of the oxide scale [17], which led to formation of an increased number of oxide particles. Further, the growth rate of the oxide particle is believed to be dependent on the diffusion rate of Fe ion in the inner oxide film according to the point defect model and dissolution-precipitation mechanism [30–32]. The diffusion of Fe ion in the inner oxide film, on the other hand, is dominated by grain boundary diffusion in accordance with Robertson oxidation model [33–37].
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The composition and properties of oxide films on type 304 stainless steel on exposure to lithiated water at 100–350°C

Abstract

Corros. Sci.

Corros. Sci.

Corrosion

Corros. Sci.

Localized Corrosion, NACE-4

Corros. Sci.

Corros. Sci.

Corrosion