Microstructure, Corrosion, and Fatigue Properties of Alumina-Titania Nanostructured Coatings

• 作者: Abdel Salam Hamdy Ahmed Ibrahim
• 来源期刊: 表面工程材料与先进技术期刊(英文)
• 学科: 工学
• 关键词: NANOSTRUCTURED COATINGS Alumina-Tiania FATIGUE Strength CORROSION Resistance
• 年，卷（期）: 2011,（3）
• 页码范围: 101-106
• 页数: 6页
• 分类号: TG17

摘要

Air Plasma spray process was used to deposit a conventional and nanostructured Al2O3-13 wt% TiO2 coatings on a stainless steel substrates. Morphology of the powder particles, microstructure and phase composition of the coatings were characterized by XRD and SEM. Potentiodynamic polarization tests and Electrochemical Impedance Spectro- scopy (EIS) were used to analyze the corrosion of the coated substrate in 3.5% NaCl solutions to determine the opti-mum conditions for corrosion protection. The fatigue strength and hardness of the coatings were investigated. The experimental data indicated that the nanostructured coated samples exhibited higher hardness and fatigue strength compared to the conventional coated samples. On the other hand, the conventional coatings showed a better localized corrosion resistance than the nanostructured coatings.