不同热处理温度下镁钛偶对的制备及其在氯化物溶液中的腐蚀行为

Manufacturing of Mg-Ti Couples at Different Heat Treatment Temperatures and Their Corrosion Behavior in Chloride Solutions.

作者信息

Sherif El-Sayed M, AlHazaa Abdulaziz N, Abdo Hany S

机构信息

Research Chair for Tribology, Surface, and Interface Sciences (TSIS), Department of Physics and Astronomy, College of Science, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia.

Center of Excellence for Research in Engineering Materials (CEREM), King Saud University, P.O. Box 800, Al-Riyadh 11421, Saudi Arabia.

出版信息

Materials (Basel). 2019 Apr 20;12(8):1300. doi: 10.3390/ma12081300.

DOI:10.3390/ma12081300

PMID:31010027

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6515459/

Abstract

In this study, rods of magnesium alloy and titanium alloy were cut to have similar height of about 5mm and size of 10 mm × 10 mm to fabricate three Mg-Ti couples. The Mg-Ti couple was heat treated at 540 °C, 570 °C, and 600 °C. The corrosion of these couples have been investigated and compared with AZ31 alloy. Potentiodynamic polarization and electrochemical impedance spectroscopy measurements were employed to study the corrosion behavior after 1.0 h and 48 h exposure to 3.5% NaCl solutions. The morphology of surfaces was examined by scanning electron microscopy (SEM) and the profile analysis was collected using an energy dispersive X-ray (EDX) analyzer after 5 days immersion in the chloride solutions. It is found that coupling Mg with Ti reduces the corrosion of AZ31 alloy, which further decreased with the increase of the temperature of treatment. Prolonging the time of exposure from 1.0 h to 48 h remarkably decreased the corrosion of the couples as well.

摘要

在本研究中，将镁合金棒和钛合金棒切割成高度约为5mm、尺寸为10mm×10mm的相似规格，以制备三组镁 - 钛偶对。镁 - 钛偶对在540℃、570℃和600℃下进行热处理。研究了这些偶对的腐蚀情况，并与AZ31合金进行比较。采用动电位极化和电化学阻抗谱测量方法，研究在3.5% NaCl溶液中暴露1.0小时和48小时后的腐蚀行为。在氯化物溶液中浸泡5天后，通过扫描电子显微镜（SEM）检查表面形态，并使用能量色散X射线（EDX）分析仪进行轮廓分析。结果发现，将镁与钛耦合可降低AZ31合金的腐蚀，且随着处理温度的升高，腐蚀进一步降低。将暴露时间从1.0小时延长至48小时，也显著降低了偶对的腐蚀。