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02355 EFFECTS OF OXYGEN CONCENTRATION ON CORROSION BEHAVIOR OF ALLOYS IN ACIDIC SUPERCRITICAL WATER

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Product Number: 51300-02355-SG
ISBN: 02355 2002 CP
Author: Yutaka Watanabe, Kazuhiro Shoji, Tadafumi Adschiri, and Kiwamu Sue
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Corrosion properties were investigated on stainless steels and Ni-base alloys in supercritical water containing 0.01mol/kg-H2SO4 at 400°C/30MPa and 400°C/60MPa as a function of oxygen concentration ranging from 3ppb to 800ppm. Corrosion rates and compositions of oxide scales indicated that Cr was basically the key element for corrosion resistance of the alloys in the testing environments. However, Fe became another major contributor to corrosion resistance when oxygen concentration of the environment was increased up to 800ppm. Oxide stability of Cr, Fe, and Ni estimated as potential-pH diagram is in good agreement with the experimental results. Keywords: supercritical water, oxygen concentration, Ni-base alloy, austenitic stainless steel, sulfuric acid, oxide scale, phase stability
Corrosion properties were investigated on stainless steels and Ni-base alloys in supercritical water containing 0.01mol/kg-H2SO4 at 400°C/30MPa and 400°C/60MPa as a function of oxygen concentration ranging from 3ppb to 800ppm. Corrosion rates and compositions of oxide scales indicated that Cr was basically the key element for corrosion resistance of the alloys in the testing environments. However, Fe became another major contributor to corrosion resistance when oxygen concentration of the environment was increased up to 800ppm. Oxide stability of Cr, Fe, and Ni estimated as potential-pH diagram is in good agreement with the experimental results. Keywords: supercritical water, oxygen concentration, Ni-base alloy, austenitic stainless steel, sulfuric acid, oxide scale, phase stability
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02357 Corrosion Behavior of Metals in SCW Environments Containing Salts and Oxygen

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Study to assess pitting corrosion resistance of 316L ASS (UNS S31603) and 25%Cr SDSS (UNS S32750) in salt solutions containing dissolved oxygen(DO). The DO levels examined were: 20, 50, and 100ppb, and the concentration of chloride ions were up to 152g/L Cl-, at 50 and 60°C. The results are reported herein.
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01364 CORROSION BEHAVIOR OF METALS IN SUPERCRITICAL WATER SOLUTIONS IN THE PRESENCE OF SALTS

Product Number: 51300-01364-SG
ISBN: 01364 2001 CP
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