论文部分内容阅读
利用统计分析和原子力显微镜(AFM)原位观测方法,研究了一种轧制粗晶的奥氏体不锈钢和它的溅射纳米晶薄膜在3.5%NaC l溶液中的点蚀行为.结果表明,溅射纳米晶薄膜的耐点蚀能力显著高于同成分的轧制粗晶材料;纳米晶薄膜的亚稳态点蚀过程被促进而稳态点蚀生长过程被抑制;电化学原子力显微镜(AFM)的原位观察可见,亚稳态点蚀在溅射薄膜表面的粒子团簇间产生,稳态点蚀为浅碟形点蚀坑生长.
The pitting corrosion behavior of austenitic stainless steel with rolled coarse grain and its sputtered nanocrystalline film in 3.5% NaCl solution was investigated by means of statistical analysis and in situ observation with atomic force microscope (AFM). The results show that, The pitting corrosion resistance of sputtered nanocrystalline films was significantly higher than that of the same materials. The metastable pitting process of nanocrystalline films was promoted and the steady-state pitting growth was inhibited. The electrochemical atomic force microscopy (AFM) ) In situ observation shows that the metastable pitting is generated between the particle clusters on the surface of the sputtered film, and the steady-state pitting is shallow dish-shaped pitting growth.