Effect of Different Chemical Etching Solutions on Physical and Chemical Surface Properties of Commercially Pure Titanium Grade 2
Source abstract
Abstract
The effects of different chemical solutions, e.g., H2SO4, HCl, and HF on surface morphology, topography, chemical state, and wettability of commercially pure titanium grade 2 were thoroughly investigated as a function of etching time using SEM, AFM, XPS, and water contact angle (WCA). The results indicated that the chemical etching treatment has a significant impact on titanium surfaces in which two obvious textures are observed based on acid solutions. HF provides micro/submicron-groove structures with higher hierarchical rough surfaces than the micro/submicron-porous structures created by H2SO4 and HCl. The formation of the Ti–F species on HF-treated substrates encourages water-repellent properties, while mixed titanium oxides (TiO and Ti2O3) on H2SO4 and HCl-treated surfaces contribute to a higher surface wettability. Consequently, the combination of micro/submicron-groove structures with rougher surfaces and the presence of the Ti–F species endow HF-treated samples to extremely yield hydrophobicity with a WCA up to 132.1 ± 0.8°, which is useful for self-cleaning applications. Further, hydrophobicity turns into hydrophilicity with a WCA down to 59.0 ± 0.9° after HCl treatment, which is applicable to biomedical products. Graphical Abstract
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Metal and Thin Film Mechanics · Titanium Alloys Microstructure and Properties · Metallurgical and Alloy Processes
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (53)
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