The corrosion behaviour of Al-MoO₃ powder metallurgy processed composites was investigated in this paper. The weight percentage of the molybdenum trioxide was varied as 5, 10 and 15 % to obtain the test samples. The effect of the reinforcement weight percent on the corrosion behaviour was investigated through the Tafel extrapolation method. Furthermore, the effect of corrosion medium temperature i.e. 3.5 % sodium chloride solution on the corrosion behaviour was also studied. The corrosion rates of the composites obtained as a result of polarization experiment through Tafel extrapolation method were checked for its validation. The comparative analysis was undergone with weight loss and solution analysis tests. The corrosion rates derived from the potentiodynamic polarization technique test disclosed that, at both room and elevated temperature of the NaCl solution, the corrosion resistance of the composites improved with the addition of MoO_3. This finding was also substantiated by the observance of less surface degradation in the SEM images of the composites incorporated with more MoO₃ content. The temperature-induced corrosion behaviour was investigated by immersing in corrosion medium at 27 °C and 80 °C and the elevation of corrosion rate in high-temperature corrosion medium was confirmed. Based on the above results, Al alloys reinforced with MoO₃ will be a suitable candidate for heat transfer applications where high erosion-corrosion is encountered in addition to mechanical damage.

Al-MoO ₃的腐蚀行为本文研究了粉末冶金处理的复合材料。将三氧化钼的重量百分比改变为5％，10％和15％，以获得测试样品。通过塔菲尔外推法研究了钢筋重量百分比对腐蚀行为的影响。此外，还研究了腐蚀介质温度（即3.5％氯化钠溶液）对腐蚀行为的影响。检查通过塔菲尔外推法进行极化实验得到的复合材料的腐蚀速率，以验证其有效性。进行了对比分析并进行了重量减轻和溶液分析测试。由电位动力极化技术测试得出的腐蚀速率表明，在室温和升高的氯化钠溶液中，_3.这一发现也被观察到，在掺入更多MoO ₃的复合材料的SEM图像中观察到较少的表面降解。通过浸入27°C和80°C的腐蚀介质中研究了温度诱导的腐蚀行为，并确认了高温腐蚀介质中腐蚀速率的升高。基于上述结果，用MoO ₃增强的铝合金将是传热应用的合适候选材料，在传热应用中，除了机械损伤外，还会遇到高腐蚀腐蚀。