Ti对流动海水中Monel K500合金应力腐蚀开裂行为及机理的影响

IF 2.3 4区材料科学 Q2 METALLURGY & METALLURGICAL ENGINEERING

Anti-corrosion Methods and Materials Pub Date : 2023-08-11 DOI:10.1108/acmm-06-2023-2845

Yu-chen Xi, Qinying Wang, Xiaofang Luo, Xingshou Zhang, Tingyao Liu, Hua Zheng, Lijin Dong, Jie Wang, J. Zhang

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引用次数: 0

摘要

目的研究Ti对蒙乃尔K500合金应力腐蚀开裂(SCC)和流动加速应力腐蚀开裂(FA-SCC)行为的影响及其机理。设计/方法/方法设计不同Ti含量的蒙乃尔K500合金。采用金相显微镜(XJP-3C)和扫描电子显微镜(EV0 MA15 Zeiss)和能量色散光谱仪分析了蒙奈尔K500合金的显微组织。在静海水和流动海水中进行了原位电化学试验，研究了FA-SCC的行为。结果:随着Ti含量的增加，合金中TiCN颗粒的数量增加。随着Ti含量的增加，Monel K500合金的静态腐蚀和SCC降低。一般情况下，合金的SCC是由暴露金属基体处的阳极溶解和靠近TiCN颗粒的金属基体的坑蚀协同作用引起的，并通过流动进一步加速。不同Ti含量的Monel K500合金在复杂流动海水环境中的腐蚀行为和机理尚不清楚，为确保合金的安全使用，仍需进行系统的研究。

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Effect of Ti on stress corrosion cracking behavior and mechanism of Monel K500 alloy in flowing seawater

Purpose The purpose of this paper is to investigate the effect Ti on stress corrosion cracking (SCC) and flow accelerated stress corrosion cracking (FA-SCC) behavior and mechanisms of Monel K500 alloy. Design/methodology/approach Monel K500 alloy with different Ti contents was designed. A metallurgical microscope (XJP-3C) and scanning electron microscopy (EV0 MA15 Zeiss) with an energy dispersive spectroscopy were used to analyze the microstructure of the Monel K500 alloy. In situ electrochemical tests were carried out in static and flowing seawater to study FA-SCC behavior. Findings The number of TiCN particles in the alloy increased as the increase of Ti content. The static corrosion and SCC of Monel K500 alloy are reduced as the content of Ti increases. Generally, the SCC of alloys was caused by the synergistic effect of the anodic dissolution at exposed metal matrix and the pit corrosion of metal matrix adjacent to TiCN particles, which was further accelerated by flowing. Originality/value The corrosion behavior and mechanism of Monel K500 alloy with different Ti contents in a complex flowing seawater environment are still unclear, which remain systematic study to insure the safe service of the alloy.

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来源期刊

Anti-corrosion Methods and Materials 工程技术-冶金工程

CiteScore

2.80

自引率

16.70%

发文量

审稿时长

13.5 months

期刊介绍： Anti-Corrosion Methods and Materials publishes a broad coverage of the materials and techniques employed in corrosion prevention. Coverage is essentially of a practical nature and designed to be of material benefit to those working in the field. Proven applications are covered together with company news and new product information. Anti-Corrosion Methods and Materials now also includes research articles that reflect the most interesting and strategically important research and development activities from around the world. Every year, industry pays a massive and rising cost for its corrosion problems. Research and development into new materials, processes and initiatives to combat this loss is increasing, and new findings are constantly coming to light which can help to beat corrosion problems throughout industry. This journal uniquely focuses on these exciting developments to make essential reading for anyone aiming to regain profits lost through corrosion difficulties. • New methods, materials and software • New developments in research and industry • Stainless steels • Protection of structural steelwork • Industry update, conference news, dates and events • Environmental issues • Health & safety, including EC regulations • Corrosion monitoring and plant health assessment • The latest equipment and processes • Corrosion cost and corrosion risk management.