在包含了氯化物离子的高温度在醋酸在 2205 不锈钢上形成的被动电影的性质被原子吸收学习 spectrometry (AAS ) , X 光检查光电子光谱学(XPS ) ,和电气化学的极化大小。AAS 结果证明当被动电影被溶解,那铝在表面上被充实。这丰富减少腐蚀抵抗因为它妨碍氯化物吸附和 Fe 离子溶解,并且充当本地 pH,因为它消费质子,缓冲。Fe/Cr 的溶解比率在被动电影的活跃溶解期间是约 10。XPS 结果显示当潜力在钝化区域时, Cr 在被动电影的近表面的区域包括大约 50% 金属阳离子并且是在这个区域的主要金属成分。当极化潜力比 transpassivation 潜力大得多时,瞬间内容在近表面的区域占约 45% 金属阳离子;Fe 和 Ni 没在被动电影的形成,溶解,或刺上有明显的影响。
The properties of the passive film formed on 2205 stainless steel in acetic acid at high temperature that contained chloride ions were studied by atomic absorption spectrometry (AAS), X-ray photoelectron spectroscopy (XPS), and electrochemical polarization measurements. AAS results show that molybdenum is enriched on the surface as the passive film is dissolved. This enrichment decreases the corrosion resistance because it hinders chloride adsorption and Fe ion dissolution, and acts as a local pH buffer because it consumes protons. The dissolution ratio of Fe/Cr is approximately 10 during the active dissolution of the passive film. XPS results indicate that when the potential is in the passivation region, Cr comprises about 50% of the metal cations in the near-surface region of the passive film and is the main metal constituent in this region. When the polarization potential is much greater than the transpassivation potential, the Mo content accounts for approximately 45% of the metal cations in the nearurface region; Fe and Ni have no obvious influence on the formation, dissolution, or puncture of the passive film.