Loskutova Tetiana, Scheffler Michael, Pavlenko Ivan, Zidek Kamil, Pohrebova Inna, Kharchenko Nadiia, Smokovych Iryna, Dudka Oleksandr, Palyukh Volodymyr, Ivanov Vitalii, Kononenko Yaroslav
Department of Physical Materials Science and Heat Treatment, Y.O. Paton Institute of Materials Science and Welding, National Technical University of Ukraine "Igor Sikorsky Kyiv Polytechnic Institute", 37 Beresteiskyi Ave., 03056 Kyiv, Ukraine.
Faculty of Mechanical Engineering, Institute for Materials and Joining Technology, Otto-von-Guericke University Magdeburg, 2 Universitätsplatz, 39106 Magdeburg, Germany.
Materials (Basel). 2024 Aug 5;17(15):3880. doi: 10.3390/ma17153880.
Improvement of wear, corrosion, and heat-resistant properties of coatings to expand the operational capabilities of metals and alloys is an urgent problem for modern enterprises. Diffusion titanium, chromium, and aluminum-based coatings are widely used to solve this challenge. The article aims to obtain the corrosion-electrochemical properties and increase the microhardness of the obtained coatings compared with the initial Ti-6Al-4V alloy. For this purpose, corrosion resistance, massometric tests, and microstructural analysis were applied, considering various aggressive environments (acids, sodium carbonate, and hydrogen peroxide) at different concentrations, treatment temperatures, and saturation times. As a result, corrosion rates, polarization curves, and X-ray microstructures of the uncoated and coated Ti-6Al-4V titanium alloy samples were obtained. Histograms of corrosion inhibition ratio for the chromium-aluminum coatings in various environments were discussed. Overall, the microhardness of the obtained coatings was increased 2.3 times compared with the initial Ti-6Al-4V alloy. The corrosion-resistant chromaluminizing alloy in aqueous solutions of organic acids and hydrogen peroxide was recommended for practical application in conditions of exposure to titanium products.
改善涂层的耐磨、耐腐蚀和耐热性能以扩展金属及合金的使用性能，是现代企业面临的一个紧迫问题。扩散钛、铬和铝基涂层被广泛用于应对这一挑战。本文旨在获取所得涂层的腐蚀电化学性能，并与初始Ti-6Al-4V合金相比提高所得涂层的显微硬度。为此，考虑了不同浓度、处理温度和饱和时间下的各种侵蚀性环境（酸、碳酸钠和过氧化氢），进行了耐腐蚀性、重量测试和微观结构分析。结果，获得了未涂层和涂层Ti-6Al-4V钛合金样品的腐蚀速率、极化曲线和X射线微观结构。讨论了铬铝涂层在各种环境中的缓蚀率直方图。总体而言，所得涂层的显微硬度比初始Ti-6Al-4V合金提高了2.3倍。推荐在钛产品暴露环境下实际应用耐有机酸酸溶液和过氧化氢的耐蚀铬铝化合金。
