粉煤灰制硅酸盐防腐砖在复杂工况下的性能退化研究

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Abstract The corrosion behavior of silicate anticorrosive brick which was made by fly ash was simulated under complex working conditions. The performance of the brick was characterized and analyzed through scanning electron microscopic, X-ray diffraction (XRD) test and mechanical compression test. The experimental results showed that the surface of the silicate anticorrosive brick was covered with a layer of complex gel layer under the high temperature-acid condition (temperature 200 ℃, 31% HCl solution). The degradation rate of strength was about 7%. Under the high temperature-acid tribo-corrosion conditions(200 ℃, rotating speed of 2 m/s), the resistance of the slurry abrasion and erosion of the brick was decreased and some defects such as corrosive pits and holes were formed locally. The compression curve showed the shape of yield step. The strength degradation rate of brick was 17.8%.

Key words： silicate anticorrosive brick complex working conditions corrosion performance degradation finite element analysis

Published: 08 January 2021

CLC number:

TB321

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 appoi-nted 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 projects.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 tech-nology paper prizes, and won the honorary titles of science and technology pacesetter 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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	ZHAO Yuhang
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Cite this article:

ZHAO Yuhang,GAO Ying,WANG Yongwang, et al. Study on Performance Degradation of Silicate Anticorrosive Brick Made by Fly Ash Under Complex Working Conditions[J]. Materials Reports, 2020, 34(Z2): 304-307.

URL:

http://www.mater-rep.com/EN/ OR http://www.mater-rep.com/EN/Y2020/V34/IZ2/304