Effect of rare earth oxide (Pr4O7) second phase and fine grain on the corrosion behavior of Ti-0.3Mo-0.8Ni

IF 7.4 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Science Pub Date : 2024-10-31 DOI:10.1016/j.corsci.2024.112549

Chaowen Zheng, Qi Wang, Ruirun Chen, Wei Wei, Yanqing Su, Hengzhi Fu

引用次数: 0

Abstract

The effect of grain refinement and second phase (Pr₄O₇) on the corrosion mechanism of the Ti-0.3Mo-0.8Ni was studied. The Pr₄O₇ nanophases are distributed in the α/β phase boundaries and the β phases (Pr ≤ 0.5 wt. %). Most of the Pr₄O₇ phases are distributed at the boundaries (Pr ≥ 1 wt. %). The Pr element refines the primary β grains. With the increment of Pr content, the passivation film becomes more stable, denser and thicker, which prolongs the decrease time of OCP, increases the corrosion potential and reduces the corrosion tendency. After the passivation film ruptures, the Pr₄O₇ aggravates the galvanic corrosion.

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稀土氧化物 (Pr4O7) 第二相和细晶粒对 Ti-0.3Mo-0.8Ni 腐蚀行为的影响

研究了晶粒细化和第二相（Pr4O7）对钛-0.3钼-0.8镍腐蚀机理的影响。Pr4O7 纳米相分布在 α/β 相边界和 β 相中（Pr ≤ 0.5 wt.%）。大部分的 Pr4O7 相分布在边界（Pr ≥ 1 重量 %）。镨元素细化了原β晶粒。随着 Pr 含量的增加，钝化膜变得更稳定、更致密、更厚，从而延长了 OCP 的下降时间，提高了腐蚀电位，降低了腐蚀倾向。钝化膜破裂后，Pr4O7 会加剧电化学腐蚀。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Corrosion Science 工程技术-材料科学：综合

CiteScore

13.60

自引率

18.10%

发文量

763

审稿时长

46 days

期刊介绍： Corrosion occurrence and its practical control encompass a vast array of scientific knowledge. Corrosion Science endeavors to serve as the conduit for the exchange of ideas, developments, and research across all facets of this field, encompassing both metallic and non-metallic corrosion. The scope of this international journal is broad and inclusive. Published papers span from highly theoretical inquiries to essentially practical applications, covering diverse areas such as high-temperature oxidation, passivity, anodic oxidation, biochemical corrosion, stress corrosion cracking, and corrosion control mechanisms and methodologies. This journal publishes original papers and critical reviews across the spectrum of pure and applied corrosion, material degradation, and surface science and engineering. It serves as a crucial link connecting metallurgists, materials scientists, and researchers investigating corrosion and degradation phenomena. Join us in advancing knowledge and understanding in the vital field of corrosion science.