TC4钛合金在模拟海水中腐蚀−磨损交互行为研究

采用自制摩擦腐蚀装置研究了TC4钛合金在模拟海水中电化学腐蚀与机械磨损间的交互作用，探究了不同电化学状态对TC4钛合金腐蚀磨损行为的影响. 在摩擦腐蚀过程中，TC4钛合金的腐蚀电位发生负偏移，腐蚀电流随着外加电位升高而增大，在零电流电势(OCP)附近TC4钛合金获得最低摩擦系数. TC4钛合金总体积损失随着外加电位的增加而增大，证实了腐蚀磨损交的交互作用随着外加电位的增加而增强；当电位从–0.5 V增大至0.8 V时，腐蚀磨损交互作用导致的材料损失占总材料损失的比例由12%增加至66%，其中腐蚀诱导磨损导致的损失量占比由7%增加至44%. OCP及其以下外加电位条件下，TC4钛合金的磨损机制为磨粒磨损；0 V电位下TC4钛合金磨损机制为磨粒磨损和疲劳磨损；0.8 V电位下TC4钛合金的磨损机制为磨粒磨损和摩擦诱导的腐蚀磨损.A self-fabricated tribocorrosion apparatus was utilized to study the interaction between electrochemical corrosion and mechanical wear of TC4 titanium alloy in simulated seawater, and to explore the influence of different electrochemical states on the tribocorrosion behavior of TC4 titanium alloy. During the tribocorrosion process, the corrosion potential of TC4 titanium alloy shifts negatively, and the corrosion current increases with the rise of applied potential; the lowest friction coefficient of TC4 titanium alloy is achieved near the open circuit potential (OCP). The total volume loss of TC4 titanium alloy increases with the increase of applied potential, confirming that the synergistic interaction of corrosion and wear intensifies as the applied potential rises. When the potential increases from -0.5 V to 0.8 V, the proportion of material loss caused by tribocorrosion interaction in the total material loss rises from 12% to 66%, among which the proportion of loss induced by corrosion-assisted wear increases from 7% to 44%. Under the applied potentials at or below OCP, the wear mechanism of TC4 titanium alloy is abrasive wear; at 0 V, its wear mechanisms are abrasive wear and fatigue wear; at 0.8 V, the wear mechanisms of TC4 titanium alloy are abrasive wear and friction-induced corrosive wear.

搜集汇总

背景与挑战

背景概述

该数据集研究了TC4钛合金在模拟海水中腐蚀与磨损的交互行为，通过自制摩擦腐蚀装置实验发现，外加电位升高会增强腐蚀磨损交互作用，导致总体积损失增大，且磨损机制从磨粒磨损向疲劳磨损和摩擦诱导腐蚀磨损转变。研究证实了电化学状态对材料行为的关键影响，为海洋工程中TC4钛合金的应用提供了重要数据。