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采用激光共聚焦显微镜(LSCM)、扫描电子显微镜(SEM)和X射线光电子能谱(XPS)技术研究了标准盐雾环境下铀钛合金表面腐蚀行为。结果表明,在标准盐雾条件下,铀钛合金表面发生不均匀腐蚀,腐蚀程度主要受附着的液膜厚度和暴露时间影响。铀钛合金早期以点蚀为主,液膜越厚腐蚀越严重。随着暴露时间的延长,腐蚀加剧,形成局域性的腐蚀,并出现腐蚀产物的开裂。对铀钛合金2种典型腐蚀区域U 4f谱的深度剖析表明,黑色区域的物质组成结构为U_3O_8/UO_(2+x)/UO_2/U,而黄色区域的物质组成结构为UO_(2+x)/UO_2/U。
The corrosion behavior of uranium-titanium alloy surface under standard salt spray environment was studied by laser scanning confocal microscopy (LSCM), scanning electron microscopy (SEM) and X-ray photoelectron spectroscopy (XPS). The results show that under the condition of standard salt spray, the surface of uranium-titanium alloy is unevenly corroded, and the corrosion degree is mainly affected by the attached film thickness and exposure time. Uranium titanium alloy pitting the main early, the more thick liquid film corrosion more serious. As exposure time lengthened, corrosion increased, localized corrosion was formed, and cracking of corrosion products occurred. The depth profile of the U 4f spectrum of two typical corrosive regions of uranium-titanium alloy shows that the material composition of black region is U_3O_8 / UO_ (2 + x) / UO_2 / U, while the yellow region is UO_ (2 + x ) / UO_2 / U.