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- W2020254687 abstract "The behaviour of acidified aged molybdate solutions has been studied. These solutions, which can be reduced to blue molybdenum deposits close to −200 mV(SSE) for 1 < pH < 2, have strong inhibiting effects on the steel active dissolution current. Both deposition and inhibition seem to be related to reduced polymer species formed in aged acid solutions. The electrochemical molybdenum incorporation treatment is studied on a Fe-Cr ferritic steel in molybdate acid solutions. The sample is first depassivated in 0. l M H2SO4, then a low concentration molybdate solution is added and the passive layer is built by a slow increasing voltammetric sweep. Incorporation of molybdenum is confirmed by AES and XPS surface analysis. Acid stability and pitting corrosion resistance are studied by means of corrosion tests and molybdenum modified layers are compared to passive films formed in various conditions and to literature data. Electrochemical polarisation has a preponderent effect on acid stability measured by the depassivation time and molybdenum has no effect or rather a negative effect. The presence of molybdenum increases the pitting potential in neutral and acidified 0.5 M NaCl solutions. The effect of redox and polymerisation reactions of molybdate in acid media on pitting corrosion is discussed." @default.
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- W2020254687 date "1995-02-01" @default.
- W2020254687 modified "2023-09-25" @default.
- W2020254687 title "The electrochemical incorporation of molybdenum in the passive layer of a 17% Cr ferritic stainless steel. Its influence on film stability in sulphuric acid and on pitting corrosion in chloride media" @default.
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- W2020254687 doi "https://doi.org/10.1016/0010-938x(94)00135-s" @default.
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