Martínez-Aparicio Brisa, Gaona-Tiburcio Citlalli, Almeraya-Calderon Facundo, Goldsberry Reece, Castaneda Homero
Universidad Autónoma de Nuevo León, FIME, Centro de Investigación e Innovación en Ingeniería Aeronáutica (CIIIA), San Nicolás de los Garza 66455, Mexico.
Department of Materials Science & Engineering, Texas A&M University, 209 Reed McDonald Building, College Station, TX 77840, USA.
Materials (Basel). 2024 Aug 15;17(16):4060. doi: 10.3390/ma17164060.
This work covers the formation of a passive state for two different alloys used in the aeronautical industry. The aim of this study is to investigate the effectiveness of passivation treatments on 17-7PH and 410 SS (stainless steel) samples, specifically when performed with citric and nitric acid solutions at 49 °C using an immersion time of 90 min and subsequent exposure in 3.5 wt.% NaCl solution. Employing the cyclic potentiodynamic polarization (CPP) technique, the corrosion properties of the passivated material were evaluated according to the ASTM G65-11 standard. A microstructural analysis was performed using scanning electron microscopy (SEM). The passivated layer was characterized via X-ray photoelectron spectroscopy. In the results, the CPP curves showed positive hysteresis, indicating pitting localized corrosion, and 17-7PH steel passivated at 49 °C for 90 min in citric acid exhibited lower corrosion rate values equivalent to ×10 mm/year.
这项工作涵盖了航空工业中使用的两种不同合金的钝态形成。本研究的目的是研究钝化处理对17-7PH和410 SS（不锈钢）样品的有效性，特别是在49°C下使用柠檬酸和硝酸溶液进行90分钟浸泡时间并随后暴露于3.5 wt.% NaCl溶液中的情况。采用循环动电位极化（CPP）技术，根据ASTM G65-11标准评估钝化材料的腐蚀性能。使用扫描电子显微镜（SEM）进行微观结构分析。通过X射线光电子能谱对钝化层进行表征。结果中，CPP曲线显示出正滞后现象，表明存在点蚀局部腐蚀，并且在49°C下于柠檬酸中钝化90分钟的17-7PH钢表现出较低的腐蚀速率值，相当于×10 mm/年。
