Erosion corrosion of low-alloy wear-resistant steels in alkaline slurry

IF 3.1 2区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Journal of Iron and Steel Research(International) Pub Date : 2017-10-01 DOI:10.1016/S1006-706X(17)30154-1

Feng-ming Song, Lin-xiu Du

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引用次数: 7

Abstract

Erosion corrosion causes significant problems in various industrial environments through a synergistic effect which results in much greater weight loss than the sum of the weight losses in the individual processes. The erosion-corrosion behavior of three low-alloy steels was investigated in a simulated concrete slurry using the rotation method. The key influencing factors and mechanism of material degradation were analyzed. The experimental results indicate that the weight loss increases with the linear velocity according to a nearly exponential relationship (W = KVⁿ), where n is 1. 40–2. 14. This weight loss is mainly caused by erosion in the alkaline slurry, and steels with higher tensile strengths show higher erosion-corrosion resistance. The formation of many platelets and ring cracks and their removal from the sample surface during erosion corrosion in the slurry are thought to constitute the mechanism responsible for this weight loss. These platelets and ring cracks are formed by solid particles striking the sample surface. Craters are initially produced and subsequently disappear as they grow and come in contact with each other. Fewer craters were observed on the surfaces of samples that exhibited higher weight loss. The surface of the material became work-hardened because of the effect of the particles striking and scratching, and a deformed layer was produced on the surface for steels of lower strengths, leading to deeper and more abundant gouges.

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低合金耐磨钢在碱性浆料中的侵蚀腐蚀

摘要:在各种工业环境中，腐蚀通过协同效应引起重大问题，其造成的重量损失远远大于单个过程中重量损失的总和。采用旋转法研究了三种低合金钢在模拟混凝土浆中的侵蚀腐蚀行为。分析了材料降解的主要影响因素和机理。实验结果表明，减重随线速度的增加呈近似指数关系(W = KVn)，其中n为1。40-2。14. 这种重量损失主要是由碱性浆料中的侵蚀引起的，抗拉强度高的钢具有更高的抗侵蚀性。在浆料的侵蚀腐蚀过程中，许多片状和环形裂纹的形成及其从样品表面的去除被认为是造成这种重量损失的机制。这些片状和环形裂纹是由固体颗粒撞击样品表面形成的。环形山最初是产生的，后来随着它们的成长和相互接触而消失。在重量损失较大的样品表面观察到的陨石坑较少。由于颗粒的撞击和刮擦作用，材料表面变得加工硬化，对于强度较低的钢，表面产生变形层，导致更深更丰富的沟槽。

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

Journal of Iron and Steel Research(International)

CiteScore

4.30

自引率

0.00%

发文量

2879

审稿时长

3.0 months