The Experts below are selected from a list of 4866 Experts worldwide ranked by ideXlab platform
Guoan Li - One of the best experts on this subject based on the ideXlab platform.
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surface treatment agent and zinc plating material
2012Co-Authors: Zhefeng Xu, Dongsheng Mei, Xingde Cheng, Yan Lou, Aiping Zhang, Yilin Zhou, Yong Chen, Guoan LiAbstract:The invention provides a trivalent chromium surface treatment agent and a zinc-plating material. The surface treatment agent is obtained by evenly mixing a raw mix; the raw mix comprises a first organic film former, a second organic film former and water; the first organic film former is a styrene-acrylic emulsion and/or a silicone-acrylic emulsion; and the second organic film former is a fluorocarbon emulsion and/or fluoro-silicon emulsion. The trivalent chromium surface treatment agent is characterized in that the raw mix also comprises a trivalent chromium compound and phosphate. The zinc-plating material provided by the invention comprises a zinc-plating base material and a coating adhering to the zinc-plating base material, and is characterized in that the coating is a solid product of the surface treatment agent. The coating obtained by solidifying the surface treatment agent provided by the invention has excellent corrosion resistance at high temperature or under the condition of being treated at high temperature. Moreover, trivalent chromium in the coating cannot be converted into hexavalent chromium, and thereby, the Environmental-Protection Requirement is completely met.
Yang Junhe - One of the best experts on this subject based on the ideXlab platform.
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preparation methods of metal surface treatment agent containing nano boron nitride and corrosion resistant coating
2016Co-Authors: Li Jing, Gan Lingzhu, Jiang Zhiyuan, Cui Jincan, Yang JunheAbstract:The invention provides a metal surface treatment agent containing nano boron nitride. The metal surface treatment agent is prepared from waterborne resin, a dispersing agent, boron nitride and coating additives, wherein the mass of the solid component in the waterborne resin is 77%-93.5% that of the total solid components of a coating, the mass of the dispersing agent is 5%-20% that of the total solid components of the coating, the mass of boron nitride is 0.5%-2% that of the total solid components of the coating, and the mass of the coating additives is 0.5%-1% that of the total solid components of the coating. The invention further provides a preparation method of the metal surface treatment agent containing nano boron nitride and a method for preparing a corrosion-resistant coating. It is proved through salt spray tests that the composite coating has ultra-high corrosion resistance. The metal surface treatment agent is waterborne paint, the formula does not contain any solvent except water, therefore, emission of volatile organic compounds does not exist, and the metal surface treatment agent meets the Environmental Protection Requirement and is suitable for surface corrosion prevention of metal substrates in industrialized production.
Tian Zeye - One of the best experts on this subject based on the ideXlab platform.
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Homogénisation des propriétés mécaniques et thermiques des briques d'argile cuites : effet de la porosité
HAL CCSD, 2018Co-Authors: Tian ZeyeAbstract:Due to the Environmental Protection Requirement, fired clay bricks are facing new development tendency. Fired clay bricks are not only satisfied with mechanical strength but also rising energy utilization. Thermal conductivity is a very important parameter to measure the energy utilization. On the premise of guaranteeing the basically mechanical properties, reducing thermal conductivity has been one of important development goals in building industry.Based on the analysis of micro-structure, microscopic pores have an effect on macroscopic elastic constants and thermal conductivity. Parallel micropores resulting from producing methods cause the transverse isotropy of fired clay bricks. However, it is not clear that the influence of micropores on the macroscopic properties. Though some models studied the effect of porosity on mechanical properties of fired clay bricks, these models are empirical and ignored many microscopic information. One of the goals of the thesis is to analyze the influence of shape, orientation and spatial distribution of microscopic factors on mechanical properties and thermal conductivity in order to provide a reference to optimize the micro-structure of fired clay bricks.En raison de l'exigence de Protection de l'environnement, les briques d'argile cuites sont face à une nouvelle tendance de développement. Briques d'argile cuites ne sont pas seulement satisfaits de la mécanique force mais aussi augmentation de l'utilisation de l'énergie. La conductivité thermique est un paramètre très important mesurer l'utilisation de l'énergie. Sur le principe de garantir essentiellement propriétés mécaniques, la réduction de la conductivité thermique a été l'un des développements importants objectifs dans l'industrie du bâtiment.Basé sur l'analyse de la microstructure, les pores microscopiques ont un effet sur la macroscopie constantes élastiques et conductivité thermique. Micropores parallèles résultant de la production les méthodes provoquent l'isotropie transversale des briques d'argile cuites. Cependant, ce n'est pas clair que l'influence des micropores sur les propriétés macroscopiques. Bien que certains modèles étudié l'effet de la porosité sur les propriétés mécaniques des briques d'argile cuite, ces modèles sont empiriques et ont ignoré de nombreuses informations microscopiques. Un des buts de la thèse est d'analyser l'influence de la forme, l'orientation et la distribution spatiale de microscopique facteurs sur les propriétés mécaniques et la conductivité thermique afin de fournir une référence optimiser la micro-structure des briques d'argile cuites
Zhefeng Xu - One of the best experts on this subject based on the ideXlab platform.
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surface treatment agent and zinc plating material
2012Co-Authors: Zhefeng Xu, Dongsheng Mei, Xingde Cheng, Yan Lou, Aiping Zhang, Yilin Zhou, Yong Chen, Guoan LiAbstract:The invention provides a trivalent chromium surface treatment agent and a zinc-plating material. The surface treatment agent is obtained by evenly mixing a raw mix; the raw mix comprises a first organic film former, a second organic film former and water; the first organic film former is a styrene-acrylic emulsion and/or a silicone-acrylic emulsion; and the second organic film former is a fluorocarbon emulsion and/or fluoro-silicon emulsion. The trivalent chromium surface treatment agent is characterized in that the raw mix also comprises a trivalent chromium compound and phosphate. The zinc-plating material provided by the invention comprises a zinc-plating base material and a coating adhering to the zinc-plating base material, and is characterized in that the coating is a solid product of the surface treatment agent. The coating obtained by solidifying the surface treatment agent provided by the invention has excellent corrosion resistance at high temperature or under the condition of being treated at high temperature. Moreover, trivalent chromium in the coating cannot be converted into hexavalent chromium, and thereby, the Environmental-Protection Requirement is completely met.
Li Jing - One of the best experts on this subject based on the ideXlab platform.
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preparation methods of metal surface treatment agent containing nano boron nitride and corrosion resistant coating
2016Co-Authors: Li Jing, Gan Lingzhu, Jiang Zhiyuan, Cui Jincan, Yang JunheAbstract:The invention provides a metal surface treatment agent containing nano boron nitride. The metal surface treatment agent is prepared from waterborne resin, a dispersing agent, boron nitride and coating additives, wherein the mass of the solid component in the waterborne resin is 77%-93.5% that of the total solid components of a coating, the mass of the dispersing agent is 5%-20% that of the total solid components of the coating, the mass of boron nitride is 0.5%-2% that of the total solid components of the coating, and the mass of the coating additives is 0.5%-1% that of the total solid components of the coating. The invention further provides a preparation method of the metal surface treatment agent containing nano boron nitride and a method for preparing a corrosion-resistant coating. It is proved through salt spray tests that the composite coating has ultra-high corrosion resistance. The metal surface treatment agent is waterborne paint, the formula does not contain any solvent except water, therefore, emission of volatile organic compounds does not exist, and the metal surface treatment agent meets the Environmental Protection Requirement and is suitable for surface corrosion prevention of metal substrates in industrialized production.