Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-31 Cooperative journals: 《中国腐蚀与防护学报》
Abstract： In fact, the metallic material corrosion process may intrinsically involve subprocesses such as the exchange of valence electron between metallic atoms and ions in corrosive medium, the formation of oxide scale, the migration of corrosive species through the formed oxide scale, and the interaction between oxidation scale and corrosive medium. Therefore, the energy state of the valence electron of components of metallic material may play an important role in the corrosion process, thus for reveal which, ultraviolet photoelectron spectroscope (UPS) and X-ray photoelectron spectroscope (XPS) may become useful tool. Herewith new progress in this respect is subsequently introduced. The valence electron energy state of components for bulk nanocrystalline materials 304 stainless steel (BN-SS304), industrial pure aluminum (BN- Al) and ingot iron (BNII), as well as their counterparts of conventional microcrystalline ones (CP-SS304), (CP-Al) and (CPII) was characterized by UPS at room temperature. The valence electron energy state of components of the oxide scale formed on these metallic materials due to corrosion in hydrochloric acid solutions, and the oxide scales formed on BN-SS304 and CP-SS304 due to air oxidation at 900 ℃ were comparatively studied by XPS. The above aquired results may enable one to establish the relationship between the corrosion performance with the valence electron energy state of components of these metallic materials, and to figure the electron structure of components of the corresponding formed oxide scales, as well. Furthermore, a new concept of intrinsic parameter related with metallic material corrosion was proposed.
Subjects: Materials Science >> Materials Science (General) submitted time 2017-03-31 Cooperative journals: 《腐蚀科学与防护技术》
Abstract：运行在辽宁电网的高压输电线塔用日本角钢服役80年以上，其表面几乎没有明显锈蚀和局部腐蚀现象，显示其良好的耐腐蚀性能。本文利用X-射线光电子能谱（XPS）研究了服役80年以上日本角钢表面氧化物的电子结构和价带结构。日本角钢氧化膜的XPS实验结果表明，随着Ar+ 溅射时间持续2100 秒，氧化膜中Zn2+ 2p3/2的结合能为1022.10 ± 0.08 eV，基本保持不变，氧化膜中Fe、Cr和Mn原子百分含量都低于10%。氧化膜主要成分为Zn 的氧化物和碳氧化合物。结合日本角钢的化学成分和氧化膜的XPS结果，分析了日本角钢耐腐蚀的原因。
Subjects: Materials Science >> Materials Science (General) submitted time 2016-11-07 Cooperative journals: 《中国腐蚀与防护学报》
Abstract：金属材料腐蚀包括化学腐蚀和电化学腐蚀。人们在化学腐蚀和电化学腐蚀领域建立了比较完善的理论体系、研究和表征以及评价方法，在金属材料腐蚀评价与表征，以及动力学过程方面做了大量的工作。实际上，金属材料腐蚀的本征过程是金属原子的价电子与腐蚀介质中离子的价电子交换、氧化膜形成、腐蚀介质和腐蚀产物在氧化膜中的输运以及氧化膜与腐蚀介质之间的交互作用。本文作者介绍与金属材料腐蚀性能有关的金属材料价电子结构和氧化膜电子结构方面的工作进展。
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