Temperature Dependence of Corrosion of Ferritic/Martensitic and Austenitic Steels in Liquid Lead-Bismuth Eutectic

Kurata, Yoshiyuki; Saito, Shigeru

doi:10.2320/matertrans.m2009173

Cited by 31 publications

(24 citation statements)

References 12 publications

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“…Previous studies in the literature [7][8][9][10][11][12][13][14][15] have shown similar behavior in LBE for the same type of alloys and test conditions, and thus the presented results were expected. Although both alloys were attacked by liquid lead, the magnitudes of the attacks were different.…”

Section: Discussionsupporting

confidence: 82%

“…The predominant issue when designing LFR systems is the choice of corrosion resistant steels [5,6]. Liquid lead and lead bismuth eutectic (LBE) attacks structural steels, such as AISI 316L and 15-15 Ti at temperatures in excess of 500°C, thus limiting the operation temperature of the reactor [7][8][9][10][11][12][13][14][15]. Alumina forming FeCrAl alloys have been proposed as a promising solution, both as bulk steels [5,[16][17][18][19][20][21][22] and more recently through surface alloying [8,23,24].…”

Section: Introductionmentioning

confidence: 99%

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Long term corrosion resistance of alumina forming austenitic stainless steels in liquid lead

Ejenstam

Szakálos

2015

Journal of Nuclear Materials

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Section: Discussionsupporting

confidence: 82%

Section: Introductionmentioning

confidence: 99%

Long term corrosion resistance of alumina forming austenitic stainless steels in liquid lead

Ejenstam

Szakálos

2015

Journal of Nuclear Materials

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“…The double layer oxide is composed of an outer Fe-oxide layer and inner oxide layer of Fe, Cr and a small amount of Al. Since this type of node formation was often observed on 316SS and 410SS without Al-alloy coating, 4) it is suggested that the coating layer containing 2.8 mass% Al does not always keep sufficient corrosion resistance in liquid LBE. It was also reported that a multilayer oxide film was formed without a protective alumina film at some places where the Al concentration in the coating layer produced by GESA treatment was below 4 mass%.…”

Section: Resultsmentioning

confidence: 96%

“…It is necessary, in particular, to improve corrosion resistance of steels above 823 K in liquid LBE. 4,5) For this purpose, it is effective to add elements such as Si and Al, which are expected to form protective oxide films in liquid LBE. A ferritic/martensitic steel containing Si, EP823 was developed in Russia.…”

Section: Introductionmentioning

confidence: 99%

Applicability of Al-Powder-Alloy Coating to Corrosion Barriers of 316SS in Liquid Lead-Bismuth Eutectic

et al. 2011

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A new Al-alloy coating method using Al, Ti and Fe powders has been applied to 316SS in order to develop corrosion resistant coating in liquid lead-bismuth eutectic (LBE). The 316SS plates with coating layers of different Al concentrations were exposed to liquid LBE with controlled oxygen concentrations of 10 À6 to 10 À4 mass% at 823 K for 3600 ks. While surface oxidation and grain boundary corrosion accompanied by liquid LBE penetration are observed in 316SS without Al-alloy coating, the Al-alloy coating is effective to protect such severe corrosion attacks in liquid LBE. Although the coating layer containing 2.8 mass% Al does not always keep sufficient corrosion resistance, good corrosion resistance is obtained through the Al-oxide film formed in liquid LBE in the coating layer where the average Al concentration is 4.2 mass%. Cracks are formed in the coating layer containing 17.8 mass% Al during the coating process. The Al-powder-alloy coating applied to 316SS is promising as a corrosion resistant coating method in liquid LBE environment.

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“…7(i>). Since the formation of oxide nodes was often observed on 316SS and 410SS [17], the coating layer containing 2.8 wt. % Al does not always maintain sufficient corrosion resistance [14].…”

Section: Corrosion Test At 550 °C For 1000 Hmentioning

confidence: 99%

Development of Al-Alloy Coating for Advanced Nuclear Systems Using Lead Alloys

Kurata

Yokota

Suzuki

2012

Journal of Engineering for Gas Turbines and Power

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Small and medium reactors using lead alloys as coolants are one ofthe promising reactor concepts with improved safety because of their thermal-physical and chemical properties. This paper focuses on the development of Al-alloy coating for nuclear systems using liquid lead-bismuth eutectic (LBE). Since corrosion attack becomes severe against structural steels at high temperatures in liquid LBE, it is necessary to improve the corrosion resistance of steels. An Al-alloy coating method using Al, Ti, and Fe powders, and laser beam heating has been developed. The main defects formed in the Al-powder-alloy coating process are surface defects and cracks. The conditions required to avoid these defects are the employment ofthe laser beam scanning rate of 20 mm/min and the adjustment of the Al concentration in the coating layer. According to the results of the corrosion tests at 550°C in liquid LBE, the Al-alloy coating layers on 316SS prevent severe corrosion attack such as grain boundary corrosion and LBE penetration observed in the 316SS without coating. The good corrosion resistance of the Al-alloy coating is based on the thin Al-oxide film, which can be regenerated in liquid LBF. From the viewpoint of the soundness of the produced Al-powder-alloy coating layers and the preservation of their corrosion resistance, it is estimated that the range of adequate Al concentration in the coating layer is from 4 to 12 wt. %.

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Temperature Dependence of Corrosion of Ferritic/Martensitic and Austenitic Steels in Liquid Lead-Bismuth Eutectic

Cited by 31 publications

References 12 publications

Long term corrosion resistance of alumina forming austenitic stainless steels in liquid lead

Long term corrosion resistance of alumina forming austenitic stainless steels in liquid lead

Applicability of Al-Powder-Alloy Coating to Corrosion Barriers of 316SS in Liquid Lead-Bismuth Eutectic

Development of Al-Alloy Coating for Advanced Nuclear Systems Using Lead Alloys

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