TiAlN涂层在模拟海水中不同流动条件下的冲蚀行为及机理

IF 1.1 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Corrosion Pub Date : 2023-04-12 DOI:10.5006/4287

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引用次数: 1

摘要

研究了高速钢(HSS)和氮化钛铝(TiAlN)涂层在模拟海水中不同流动条件下的冲蚀行为。在正面(朝向水流方向)，TiAlN涂层的失效可以忽略不计，但在HSS上有明显的侵蚀腐蚀痕迹。然而，由于高速水流集中在边缘，中心湍流度高，两个试件的背面(逆水流方向)出现了意外的破坏特征。HSS的腐蚀主要发生在中心，腐蚀主要发生在边缘。对于TiAlN/HSS涂层，致密的层状结构阻碍了表面裂纹向体内扩展，从而促进了层间的剥落。此外，在两个试样上都观察到明显的“流动痕迹”，这可以用流动加速腐蚀来解释。

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Erosion-corrosion behavior and mechanism of TiAlN coating under different flow conditions in simulated seawater

Erosion-corrosion behavior of high speed steel (HSS) and titanium aluminum nitride (TiAlN) coating were investigated under different flow conditions in simulated seawater. On the front side (facing towards the direction of water flow), there was a negligible failure of the TiAlN coating, but clear marks of erosion-corrosion on the HSS. Notwithstanding, unexpected failure features were identified on the back side (back against the direction of water flow) on both specimens, because the high-velocity water flow was localized at the edge and the center was high in turbulence. For the HSS, there was dominate corrosion in the center and dominant erosion at the edge. For the TiAlN/HSS coating, the dense and layered structure retards the propagation of surface cracks as the major failure into the bulk and instead promotes layer-by-layer spallation. Additionally, visible ‘flow marks’ were observed on both specimens and can be explained by the flow-accelerated-corrosion.

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来源期刊

Corrosion MATERIALS SCIENCE, MULTIDISCIPLINARY-METALLURGY & METALLURGICAL ENGINEERING

CiteScore

2.80

自引率

12.50%

发文量

审稿时长

3 months

期刊介绍： CORROSION is the premier research journal featuring peer-reviewed technical articles from the world’s top researchers and provides a permanent record of progress in the science and technology of corrosion prevention and control. The scope of the journal includes the latest developments in areas of corrosion metallurgy, mechanisms, predictors, cracking (sulfide stress, stress corrosion, hydrogen-induced), passivation, and CO2 corrosion. 70+ years and over 7,100 peer-reviewed articles with advances in corrosion science and engineering have been published in CORROSION. The journal publishes seven article types – original articles, invited critical reviews, technical notes, corrosion communications fast-tracked for rapid publication, special research topic issues, research letters of yearly annual conference student poster sessions, and scientific investigations of field corrosion processes. CORROSION, the Journal of Science and Engineering, serves as an important communication platform for academics, researchers, technical libraries, and universities. Articles considered for CORROSION should have significant permanent value and should accomplish at least one of the following objectives: • Contribute awareness of corrosion phenomena, • Advance understanding of fundamental process, and/or • Further the knowledge of techniques and practices used to reduce corrosion.