S043011 電子励起による表面改質を施したマグネシウムの腐食現象([S04301]環境調和型の表面改質および薄膜コーティング(1))

概要

論文の詳細を見る
Magnesium (Mg) is highly corrosive due to its low standard electrode potential (SEP). The conventional methods to improve corrosion resistance of Mg alloys are anodic oxide film formation and chemical conversion treatment. However, these methods are expensive and Mg treated by these methods is hard to recycle. In this study, new corrosion protection method by surface improvement of pure Mg using the electron excitation was investigated. Surface potential variation of pure Mg was measured by using Scanning Kelvin Probe Force Microscopy (SKPFM), to determine anodic/cathodic area at the interface of different phases in the local galvanic cell. The electronically excited area by electron beam irradiation using Scanning Electron Microscope (SEM) showed lower surface potential than that of the as-polished surface. The results indicated corrosion resistance improvement in electronically excited area containing less corrosion products compared to as-polished area by SEM image after salt water immersion test and topographic change obtained by Atomic Force Microscope (AFM).
一般社団法人日本機械学会の論文
2011-09-11