Corrosion Properties Characterization of 06Cr18Ni10Ti, 08Cr18Ni10Ti Steels and 42CrNiMo Alloy under Conditions Simulating Primary Coolant of Pressurized Water Reactor

Q3 Mathematics

Metallofizika I Noveishie Tekhnologii Pub Date : 2023-08-14 DOI:10.15407/mfint.45.04.0481

V. Zuyok, R. Rud, M. Tretyakov, N. Rud', Yana Kushtym, V. Shtefan

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Abstract

The article presents an analysis of the corrosion properties of structural materials for primary circuit of light-water reactors. Results of autoclave testing of austenitic stainless steels 06Cr18Ni10Ti, 08Cr18Ni10Ti and chromium–nickel alloy 42CrNiMo in a model environment of primary coolant at a temperature of 350 ° C and a pressure of 16.5 MPa are presented. Corrosion resistance is estimated by the rate of mass change and the appearance of the samples, the microstructure of the oxide films, and the amount of metal that entered into reaction with the corrosion environment. As established, the samples of the 42CrNiMo alloy, in contrast to the Cr18Ni10Тi steel samples, are oxidized with a mass gain of 9 mg / dm 2 for 10 000 hours of testing. The mass index of stainless-steels’ corrosion during the same exposure time almost did not change and is of 0– − 2 mg / dm 2 . The reflectivity of the surface of the samples is decreased slightly, the oxide film is firmly attached to the metal substrate; there is no local corrosion or deposits that indicates the high corrosion resistance of the studied materials. The study of the morphology of the oxide-films’ surface reveals that compact pyramidal-shaped microcrystalline precipitates grow during autoclaving. The corrosion products are chemically removed from the surface of the samples to evaluate the corrosion damage of the studied materials. As shown

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06Cr18Ni10Ti、08Cr18Ni10Ti钢和42CrNiMo合金在模拟压水堆主冷却剂条件下的腐蚀性能表征

对轻水堆一次回路结构材料的腐蚀性能进行了分析。介绍了在主冷剂温度为350℃、压力为16.5 MPa的模拟环境下，对06Cr18Ni10Ti、08Cr18Ni10Ti奥氏体不锈钢和42CrNiMo铬镍合金进行高压灭菌试验的结果。耐蚀性是通过样品的质量变化率和外观、氧化膜的微观结构以及与腐蚀环境发生反应的金属量来估计的。与Cr18Ni10Тi钢样品相比，42CrNiMo合金样品在10,000小时的测试中以9 mg / dm 2的质量增益被氧化。不锈钢在相同暴露时间内的腐蚀质量指数几乎没有变化，为0 ~ 2 mg / dm 2。所述样品表面的反射率略有下降，所述氧化膜牢固地附着在所述金属基板上;没有局部腐蚀或沉积，表明所研究的材料具有很高的耐腐蚀性。对氧化膜表面形貌的研究表明，在高压灭菌过程中形成了致密的金字塔状微晶沉淀。用化学方法将腐蚀产物从样品表面去除，以评估所研究材料的腐蚀损伤。如图所示

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来源期刊

Metallofizika I Noveishie Tekhnologii 工程技术-材料科学：综合

CiteScore

1.20

自引率

0.00%

发文量

审稿时长

4-8 weeks

期刊介绍： ‘Metallophysics and Advanced Technologies’ or ‘Metallofizika i Noveishie Tekhnologii’ (‘MNT’) publishes original works (regular papers and reviews) not previously published and not being considered for publication elsewhere. The works accepted for publication in ‘MNT’ will not be published elsewhere in the same language without the consent of the Editors and Publisher. It is a condition of acceptance by the Editor of a manuscript for publication that the Publishers acquire automatically the copyright in the manuscript throughout the world. The journal publishes the new results of experimental and theoretical researches in the physics and technology of metals, alloys, and compounds with metallic properties; reviews of the monographs; information on conferences and seminars; information on the history of metal physics; advertising of new technologies, materials, and devices. Scope of the Journal: Electronic Structure and Properties, Crystal-Lattice Defects, Phase Transformations, Physics of Strength and Plasticity, Metallic Surfaces and Films, Structure and Properties of Nanoscale and Mesoscopic Materials, Amorphous and Liquid States, Interactions of Radiation and Particles with Condensed Matter, Materials in Extremal Conditions, Reactor and Aerospace Metals Science, Medical Metals Science, New Metallic Materials and Synthetic Metals, Metal-Containing Smart Materials, Physical and Technical Bases of Experiment and Diagnostics, Articles under Discussion.