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Start Over Author "Sun, Caixia" Journal corrosion science
5 results on '"Sun, Caixia"'

3. High temperature oxidation and hot corrosion behaviors of Ti2AlNb alloy at 923 K and 1023 K

Author

Zhang Hailong, Shouying Li, Jingjie Dai, Amin Wang, Zhang Hongxia, and Sun Caixia

Subjects
Materials science, Scanning electron microscope, 020209 energy, General Chemical Engineering, Sodium, Alloy, Salt (chemistry), chemistry.chemical_element, 02 engineering and technology, engineering.material, Corrosion, chemistry.chemical_compound, Sodium sulfate, 0202 electrical engineering, electronic engineering, information engineering, General Materials Science, Spectroscopy, Oxidation resistance, chemistry.chemical_classification, technology, industry, and agriculture, General Chemistry, equipment and supplies, 021001 nanoscience & nanotechnology, chemistry, Chemical engineering, engineering, 0210 nano-technology
Abstract

High temperature oxidation and hot corrosion behaviors of a Ti2AlNb alloy (Ti2AlNb) at 923 K and 1023 K for 1000 h were investigated, using mixtures of sodium chloride (NaCl) and sodium sulfate (Na2SO4) as the hot corrosion media. Mass gains of oxidation and mass changes of hot corrosion of the alloy were measured. Surface morphologies, cross-section structure and products of the alloy after oxidation and hot corrosion were examined and analyzed by scanning electron microscopy (SEM), X-ray diffraction (XRD) and energy dispersive X-ray spectroscopy (EDS). The alloy exhibited good high temperature oxidation resistance and hot corrosion resistance at 923 K over a period of 1000 h. The alloy was not resistant to oxidation and hot corrosion at 1023 K over the same period. The higher the content of NaCl in the mixed salt medium, the more intense was the hot corrosion of the alloy.

Published
2021

4. The effect of Nb and Si on the hot corrosion behaviors of TiAl coatings on a Ti-6Al-4V alloy

Author

Shouying Li, Zhang Hongxia, Jingjie Dai, Yong Yang, Chuanzhong Chen, and Sun Caixia

Subjects
Diffraction, Materials science, Scanning electron microscope, 020209 energy, General Chemical Engineering, Metallurgy, 02 engineering and technology, General Chemistry, 021001 nanoscience & nanotechnology, law.invention, Corrosion, Magazine, Acoustic emission, law, 0202 electrical engineering, electronic engineering, information engineering, General Materials Science, Ti 6al 4v, 0210 nano-technology, Corrosion kinetics, Science, technology and society
Abstract

Hot corrosion behaviors of TiAl coatings with different Nb and Si additions in a Na2SO4 + NaCl salt mixture at 800 °C were investigated. Corrosion kinetics was evaluated based on mass change measurements. The corrosion products and morphologies of the corrosion scales were measured by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The adhesion strength of the corrosion scales was evaluated by acoustic emission (AE). High Si addition on its own and a co-addition of a high content of Si and an appropriate content of Nb improved the hot corrosion resistance of the coatings.

Published
2020

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