Materials Reports  2020, Vol. 34 Issue (Z1): 181-184 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Degradation of Silicate Adhesive Under High Temperature andTribo-Corrosion Condition |
| ZHAO Yuhang, WANG Yongwang
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| Research Center of Shenhua Zhunneng Comprehensive Resource Development Co. Ltd., Ordos 010300, China |
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Abstract The silicate adhesive with liquid phase containing K+, Na+ was designed and prepared, and the properties were studied under special high temperature and tribo-corrosion working conditions. The degradation behavior of the adhesive was evaluated and analyzed through scanning electron microscopic, X-ray diffraction (XRD) test, mechanical compression test and finite element modeling. The results showed that the insoluble mixed-salt formed on the surface of the adhesive under high temperature and abrasion condition (with a temperature of 200 ℃ and flow rate of 2 m/s). The degradation rate of strength was about 12%. Both under high temperature corrosion condition (200 ℃, solution with 31% hydrochloric acid) and high temperature tribo-corrosion condition (200 ℃, solution with 31% hydrochloric acid and flow rate of 2 m/s), the chemical reaction occurred on the surface of adhesive and the soluble salt with chloride was generated, which cannot form protective film. The degradation rates of strength are 31% and 39% respectively under above two conditions. Under high temperature and tribo-corrosion, the damage process of the silicate adhesive was mainly controlled by corrosion factor.
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Published: 01 July 2020
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| Fund:This work was financially supported by the Science and Technology Support Program of the 12th Five Year Plan of the Ministry of Science and Technology of China (2011BAA04B05). |
| About author:: Yuhang Zhao, received his Ph.D. degree in material science and engineering from Metal Research Institute of Chinese Academy of Sciences in 2013. He was appoin-ted to senior engineer of R & ; D Center of National Energy Group and dedicated to the research on the corrosion and protection of equipment and materials in the process of “one-step acid dissolution method” for extracting alumina from fly ash. He has published 5 papers in academic journals, authorized 10 national patents which included 7 national invention patents, 5 enterprise standards. His research mainly carried out the basic theoretical research on the corrosion behavior of the equipment and materials under the simulated working condition. He presided over and participated in more than 10 national and enterprise scientific research project ; Yongwang Wang graduated from China University of Mining and Technology. He was appointed to senior engineer with the rank of a professor of R & ; D Center of National Energy Group and dedicated to research and development of comprehensive utilization technology of coal mining and its associated resources. He has published 27 papers in academic journals, authorized 51 national patents which included 32 national invention patents, 8 enterprise standards. The research work mainly includes the research and development of the key technology of “one-step acid dissolution method”, the application of the theory and technology of high-value utilization of coal series resources, the research and development of corresponding equipment, materials and environmental protection technology, and the construction of industrial practice system of extracting alumina by the acid method of fly ash. He has won one provincial and ministerial first prize, one industry first prize, two second prizes, one third prize, Shenhua Group three science and technology first prizes and three science and techno-logy paper prizes, and won the honorary titles of science and technology pace-setter of Inner Mongolia Autonomous Region, new technology star and grassland talent of erdos City, advanced science and technology worker of Shenhua Group, etc. |
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