7055铝合金在3.5%NaCl溶液中腐蚀磨损性能的研究

本文中研究了不同固溶处理后7055铝合金在3.5%NaCl溶液中的耐腐蚀行为，在3.5%NaCl溶液下进行了静态腐蚀试验及腐蚀磨损试验，并通过扫描电子显微镜对磨痕形貌进行分析. 结果表明：固溶处理后试样的耐腐蚀性能均有不同程度的提高，其中以双级固溶处理试样的耐腐蚀性能最好. 在动极化、开路电位以及阴极保护和阳极加速腐蚀试验中，固溶处理后材料自腐蚀电位正移，腐蚀电流密度减小，耐腐蚀磨损性能提高. 在不同加载电位下，腐蚀电流密度和磨损率随着电位的增加而增大，在−1.2 V时摩擦系数最小. 同时随着电位的升高，腐蚀作用促进了合金的磨损. 在较低电位时，合金的腐蚀磨损机制主要是磨粒磨损；而较高电位下，合金的腐蚀磨损机制主要是黏着磨损和腐蚀磨损.

This study investigates the corrosion resistance behavior of 7055 aluminum alloy after different solution treatments in 3.5% NaCl solution. Static corrosion tests and corrosion-wear tests were conducted in 3.5% NaCl solution, and the wear track morphology was analyzed via scanning electron microscopy (SEM). The results show that the corrosion resistance of the solution-treated specimens is improved to varying degrees, among which the two-stage solution-treated specimens exhibit the best corrosion resistance. During potentiodynamic polarization, open circuit potential (OCP), cathodic protection and anodic accelerated corrosion tests, the corrosion potential of the solution-treated materials shifts positively, the corrosion current density decreases, and the corrosion-wear resistance is improved. Under different applied potentials, the corrosion current density and wear rate increase with the rise of potential, and the friction coefficient reaches the minimum at -1.2 V. Meanwhile, with the increase of potential, the corrosion effect promotes the wear of the alloy. At lower potentials, the corrosion-wear mechanism of the alloy is mainly abrasive wear; while at higher potentials, the corrosion-wear mechanism is mainly adhesive wear and corrosive wear.

搜集汇总

背景与挑战

背景概述

该数据集聚焦于7055铝合金在3.5%NaCl溶液中的腐蚀磨损性能，通过固溶处理实验发现，双级固溶处理能显著提高材料的耐腐蚀性，降低腐蚀电流密度。研究还表明，随着加载电位的增加，腐蚀电流密度和磨损率上升，并在不同电位下揭示了从磨粒磨损到黏着磨损和腐蚀磨损的机制转变。