CAJ | 학술논문

研究环氧涂层处理后的Mg?3Al?1Zn合金在齿轮油环境下的腐蚀疲劳行为。采用扫描电子显微镜(SEM)观察疲劳试验后试样的腐蚀形貌及疲劳断口特征，并通过能谱仪(EDS)分析试样在齿轮油中的腐蚀产物成分。分析环氧涂层处理前、后2种试样的腐蚀疲劳性能和疲劳裂纹萌生机制。结果表明：经环氧涂层处理后，试样在齿轮油中的腐蚀疲劳极限高于未处理试样的。这是由于环氧涂层可以将镁合金与周围腐蚀环境良好地隔离。环氧涂层的力学性能比镁合金的差，这是疲劳裂纹优先从环氧涂层萌生的重要原因。另外，齿轮油的润滑作用可以使环氧涂层产生剥落现象。
연구배양도층처리후적Mg?3Al?1Zn합금재치륜유배경하적부식피로행위。채용소묘전자현미경(SEM)관찰피로시험후시양적부식형모급피로단구특정，병통과능보의(EDS)분석시양재치륜유중적부식산물성분。분석배양도층처리전、후2충시양적부식피로성능화피로렬문맹생궤제。결과표명：경배양도층처리후，시양재치륜유중적부식피로겁한고우미처리시양적。저시유우배양도층가이장미합금여주위부식배경량호지격리。배양도층적역학성능비미합금적차，저시피로렬문우선종배양도층맹생적중요원인。령외，치륜유적윤활작용가이사배양도층산생박락현상。
The corrosion fatigue behavior of epoxy-coated Mg?3Al?1Zn alloy in gear oil was investigated. The corrosion and the fracture surfaces after fatigue test were analyzed by scanning electron microscopy (SEM) and the corrosion compositions were measured by energy-dispersive spectrometry (EDS). The fatigue properties and the crack initiation mechanisms of the specimens before and after epoxy coating treatment were discussed. The results indicate that the fatigue limit after epoxy coating treatment in gear oil is higher than that of the uncoated specimens. The epoxy coating is an excellent way to prevent direct contact between the Mg?3Al?1Zn alloy and surrounding environments. The mechanical properties of the epoxy coating layer are lower than that of magnesium alloy, which is the main reason for the fatigue crack initiation on the epoxy coating layer. In addition, the gear oil lubrication could lead to the flaking off of the epoxy-coated layer.