Effects of excitation parameters on fretting wear and corrosion of 316L stainless steel under random impact-sliding condition

IF 5.3 1区 工程技术 Q1 ENGINEERING, MECHANICAL
Wear Pub Date : 2024-08-10 DOI:10.1016/j.wear.2024.205541
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引用次数: 0

Abstract

In heat exchanger applications, the random vibration due to fluid excitation can cause mechanical wear between tubes and supports. In corrosive environments, the synergy between wear and corrosion can make wear more severe. Therefore, this paper focused on the effects of excitation amplitude and excitation force ratio (drag force/lift force) on fretting wear and corrosion of 316L stainless steel under random impact-sliding conditions. The results showed that as the excitation parameters increased, the friction coefficient and total wear amount would increase, the open circuit potential (OCP) decreased and the polarization curve self-corrosion potential shifted negatively. All synergistic coefficients in this paper were greater than 1, indicating that there was an obvious positive synergy between wear and corrosion. In the fretting wear and corrosion process, pure wear always played a dominant role. Under impact-sliding conditions, as the excitation force increased, the rate of wear-promoted corrosion increased from 3.0 × 10−7 to 2.0 × 10−6 g/h, an increase of 6.67 times. However, the rate of corrosion-promoted wear decreased from 1.1 × 10−6 to 2.0 × 10−7 g/h, a decrease of 5.5 times, showing a certain self-limiting property. The total synergy rose slowly with the increase of excitation parameters. The wear mechanism of materials under impact is characterized by adhesive wear, while under impact-sliding conditions, the wear mechanism involves abrasive wear and corrosion wear.

激励参数对随机冲击-滑动条件下 316L 不锈钢摩擦磨损和腐蚀的影响
在热交换器应用中,流体激振引起的随机振动会造成管子和支架之间的机械磨损。在腐蚀环境中,磨损和腐蚀之间的协同作用会使磨损更加严重。因此,本文重点研究了在随机冲击滑动条件下,激振振幅和激振力比(阻力/提升力)对 316L 不锈钢的摩擦磨损和腐蚀的影响。结果表明,随着激振参数的增加,摩擦系数和总磨损量增加,开路电位(OCP)降低,极化曲线自腐蚀电位负移。本文中所有的协同系数都大于 1,表明磨损和腐蚀之间存在明显的正协同作用。在摩擦磨损和腐蚀过程中,纯磨损始终起主导作用。在冲击滑动条件下,随着激振力的增加,磨损促进腐蚀的速率从 3.0 × 10-7 g/h 增加到 2.0 × 10-6 g/h,增加了 6.67 倍。然而,腐蚀促进磨损的速率却从 1.1 × 10-6 g/h 降至 2.0 × 10-7 g/h,下降了 5.5 倍,显示出一定的自限制特性。随着激励参数的增加,总协同效应缓慢上升。材料在冲击条件下的磨损机理以粘着磨损为特征,而在冲击-滑动条件下,磨损机理涉及磨料磨损和腐蚀磨损。
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
Wear
Wear 工程技术-材料科学:综合
CiteScore
8.80
自引率
8.00%
发文量
280
审稿时长
47 days
期刊介绍: Wear journal is dedicated to the advancement of basic and applied knowledge concerning the nature of wear of materials. Broadly, topics of interest range from development of fundamental understanding of the mechanisms of wear to innovative solutions to practical engineering problems. Authors of experimental studies are expected to comment on the repeatability of the data, and whenever possible, conduct multiple measurements under similar testing conditions. Further, Wear embraces the highest standards of professional ethics, and the detection of matching content, either in written or graphical form, from other publications by the current authors or by others, may result in rejection.
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