Study of corrosion kinetics and microstructure of α-phase pure titanium tube in environment 300°C and 8.6MPa water

• Published in: Corrosion science 2020-01, Vol.162, p.108217, Article 108217
• Main Authors: Zhang, Liang, Sun, Danqi, Xiong, Ru
• Format: Article
• Language: English
• Subjects: A. Titanium; Autoclaving; B. SEM; B. XRD; B.EDS; C. Corrosion kinetic; Chemical composition; Corrosion; Corrosion tests; Film thickness; Morphology; Organic chemistry; Oxide coatings; Phase composition; Reaction kinetics; Titanium; Weight
• ISSN: 0010-938X; 1879-0496
• DOI: 10.1016/j.corsci.2019.108217

•The average corrosion weight gain of a-phase pure titanium tube within 300°C and 8.6MPa water was 1.36∼1.67 mg/dm2×month, with its curve following the quasi-parabolic law.•The relationship equation between the thickness of oxide film and corrosion time was deduced by logarithmic linear fitting and allometric function fitting.•The morphology, chemical composition profile and phase composition of the surface and cross section of the samples were studied, and the oxide film thickness was calculated according to the oxygen profile. The corrosion kinetics of α-phase pure titanium tube was studied in an autoclave. The average corrosion weight gain was 1.36∼1.67 mg/dm2×month. The corrosion weight gain curve followed a quasi-parabolic law. The corrosion kinetics model was established and the relationship between the thickness of the oxide film and the corrosion time was expressed. The morphology, chemical composition profile and phase composition of the surface and cross section of the specimens were studied by SEM, EDS and XRD. The oxide film thickness was calculated from oxygen profile.