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首页> 外文期刊>Corrosion science >Investigation Of Erosion-corrosion Of 3003 Aluminum Alloy In Ethylene Glycol-water Solution By Impingement Jet System
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Investigation Of Erosion-corrosion Of 3003 Aluminum Alloy In Ethylene Glycol-water Solution By Impingement Jet System

机译：冲击射流法研究3003铝合金在乙二醇水溶液中的腐蚀

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摘要

Erosion-corrosion (E-C) of 3003 aluminum (Al) alloy in ethylene glycol-water solutions were studied by weight-loss and electrochemical measurements as well as surface characterization through an impingement jet system. Al alloy E-C is dominated by erosion components, i.e., pure erosion and corrosion-enhanced erosion, which account for 92-97% of the total E-C rate under the various conditions in this work. Contribution from corrosion components, including pure corrosion and erosion-enhanced corrosion, is slight. With the increase of fluid flow velocity and sand concentration, the total E-C rate increases. Compared with the significant increase of the rates of erosion components, the increase of the rate of corrosion component is negligible. Upon fluid flow, passivity of Al alloy that develops in static solution cannot be maintained, and an activation mechanism dominates the corrosion process of Al alloy. The effect of fluid impact angle on Al alloy E-C depends on the competitive effect of normal stress and shear stress. Under normal impact, the surface film would be broken and damaged, but still remain on the electrode surface to provide somewhat protection. With the decrease of impact angle, shear stress becomes dominant, and it would thinner and even completely remove the film. The enhanced surface irregularity of electrode under fluid impact is indicated by the presence of inductive loop in EIS plots. The effects of impact angle on electrode surface status and E-C rate are confirmed by surface morphology observation.
机译：通过重量损失和电化学测量以及通过冲击喷射系统的表面表征，研究了3003铝（Al）合金在乙二醇水溶液中的冲蚀（E-C）。铝合金E-C主要受腐蚀成分的影响，即纯腐蚀和腐蚀增强腐蚀，在这项工作的各种条件下，它们占总E-C率的92-97％。腐蚀成分（包括纯腐蚀和腐蚀增强腐蚀）的贡献很小。随着流体流速和砂浓度的增加，总E-C速率增加。与腐蚀成分比率的显着增加相比，腐蚀成分比率的增加可忽略不计。在流体流动时，不能维持在静态溶液中发展的铝合金的钝化性，并且活化机制主导了铝合金的腐蚀过程。流体冲击角对铝合金E-C的影响取决于法向应力和剪切应力的竞争效应。在正常冲击下，表面膜会破裂和损坏，但仍保留在电极表面上以提供某种保护。随着冲击角的减小，剪切应力成为主导，它将变薄甚至完全去除薄膜。 EIS图中感应回路的存在表明电极在流体冲击下表面的不规则性增强。通过表面形态观察证实了冲击角对电极表面状态和E-C率的影响。

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