论文部分内容阅读
利用原子力显微镜 (AFM)原位考察了铜在SO2 质量分数为 0 .9× 1 0 - 6和 90 %相对湿度条件下 ,大气腐蚀过程中表面形貌及结构变化 ,观察到铜在大气腐蚀中高分辨的形貌变化过程 :铜表面逐渐形成纳米级的蚀点 ,并随着时间延长变大和彼此交迭 ,而后开始更大尺度的新一层次蚀点的发展 ,表现出腐蚀微电池层次发展特征。红外反射吸收光谱 (IRAS)表明 ,碱式硫酸盐是构成腐蚀产物膜的主要组分。石英晶体微天平 (QCM)原位测得的动力学曲线表明 ,铜在该条件下的腐蚀速度呈现出随时间延长而逐渐下降的趋势 ,说明形成的腐蚀产物对进一步腐蚀产生抑制作用。
The atomic force microscopy (AFM) was used to investigate the surface morphology and structure of copper during atmospheric corrosion under SO2 mass fraction of 0.9 × 10 ~ 6 and 90% relative humidity in situ. It was observed that the copper content was high in atmospheric corrosion The resolution of the morphological changes: the gradual formation of nano-scale copper surface etching points, and as time grows larger and overlap each other, and then start a larger scale of a new level of etching points, showing the evolution of corrosion micro-cell level . Infrared reflection absorption spectroscopy (IRAS) shows that basic sulfate is the main component of the corrosion product film. The in-situ kinetic curves of quartz crystal microbalance (QCM) show that the corrosion rate of copper shows a trend of decreasing with time, indicating that the formed corrosion products have an inhibitory effect on further corrosion.