Improvement of oxidation resistance of 9 mass% chromium steel for advanced-ultra supercritical power plant boilers by pre-oxidation treatment. (January 2017)

• Record Type: Journal Article
• Authors: Abe, Fujio; Kutsumi, H.; Haruyama, H.; Okubo, H.
• Is Part Of: Corrosion science. Volume 114(2017)
• Page Start: 1
• Page End: 9
• Publication Date: 2017-01
• Subjects: A. Low alloy steel, 9 mass% Cr steel -- B. Stem -- C. Oxidation, Cr2O3 scale -- Pre-oxidation treatment; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2016.10.008
• Languages: English
• ISSNs: 0010-938X

Abstract

Highlights: Pre-oxidation treatment in argon gas containing 0.1 ppm to 1 volume % oxygen improves oxidation resistance of 9 mass% Cr steel in steam at 650 °C. A thin scale of Cr2 O3 -rich oxides is formed on the surface of 9Cr steel by the pre-oxidation treatment.The addition of Si enhances the formation of Cr2 O3 -rich oxide scale. Abstract: Effect of pre-oxidation treatment on oxidation resistance in steam at 650 °C has been investigated for 9 mass% chromium (Cr) steel for advanced ultra-supercritical power plants. The formation of thin scale of Cr2 O3 -rich oxides is achieved by pre-oxidation in argon gas containing 0.3 ppm oxygen, which significantly improves the oxidation resistance of the steel in steam at 650 °C for a long time exceeding 20, 000 h. Effects of pre-oxidation conditions, such as oxygen concentration in argon gas and pre-oxidation temperature and time, and of silicon concentration in the steel on the oxidation resistance in stream are systematically investigated.