Yousif Qahtan A, Majeed Mohammad N, Bedair Mahmoud A
University of Al-Qadisiyah, College of Engineering, Department of Materials Engineering Iraq
Electric Power Generation Department of Kufa Cement Plant/Processing and Laboratory Research Iraq.
RSC Adv. 2022 Nov 24;12(52):33725-33736. doi: 10.1039/d2ra06949k. eCollection 2022 Nov 22.
The turbine blades of turbochargers are corroded after being cleaned with water in the presence of gasses produced during the combustion of heavy fuel. For that, manganese oxide (MnO), titanium dioxide (TiO), and titanium oxide-graphene (TiO-C) nanomaterials have been coated on the nickel alloy, which is the composition of turbine blades, by the electrophoretic deposition technique for protection against the corrosion process. The anticorrosion performance of nanomaterial coatings has been investigated using electrochemical methods such as open circuit potential, potentiodynamic, electrochemical impedance, and linear polarization resistance in a 1 M HSO solution saturated with carbon dioxide. The corrosion rate of nanomaterial-coated Ni-alloy was lower than bare alloy, and potential corrosion increased from -0.486 V for uncoated Ni-alloy to -0.252 V saturated calomel electrode for nanomaterial coated Ni-alloy electrodes. Electrochemical measurements show that TiO coated Ni-alloy corrosion has good protective qualities, with an efficiency of 99.91% at 0.146 mA cm current density in sulfuric acid media. The findings of this study clearly show that TiO has a high potential to prevent nickel alloy turbine blades from corrosion in acidic media. Furthermore, the surface morphologies have revealed that TiO and MnO coatings might successfully block an acid assault due to the high adhesion of the protective layer on the nickel alloy surface. The use of X-ray diffraction (XRD) enhanced the various measures used to determine and study the composition of the alloy surface's protective coating.
在重质燃料燃烧过程中产生的气体存在的情况下，用水清洗后，涡轮增压器的涡轮叶片会被腐蚀。为此，通过电泳沉积技术将氧化锰（MnO）、二氧化钛（TiO）和氧化钛-石墨烯（TiO-C）纳米材料涂覆在作为涡轮叶片成分的镍合金上，以防止腐蚀过程。在饱和二氧化碳的1M HSO溶液中，使用开路电位、动电位、电化学阻抗和线性极化电阻等电化学方法研究了纳米材料涂层的防腐性能。纳米材料涂覆的镍合金的腐蚀速率低于裸合金，未涂覆的镍合金的电位腐蚀从-0.486V增加到纳米材料涂覆的镍合金电极的饱和甘汞电极的-0.252V。电化学测量表明，TiO涂覆的镍合金腐蚀具有良好的保护性能，在硫酸介质中，在0.146 mA cm电流密度下效率为99.91%。这项研究的结果清楚地表明，TiO在防止镍合金涡轮叶片在酸性介质中腐蚀方面具有很高的潜力。此外，表面形态表明，由于保护层在镍合金表面的高附着力，TiO和MnO涂层可能成功地阻止了酸的侵蚀。X射线衍射（XRD）的使用增强了用于确定和研究合金表面保护涂层成分的各种措施。
