WO2019051753A1 - Preparation method for high wear-resistant and easy-to-clean nano-coating layer - Google Patents
Preparation method for high wear-resistant and easy-to-clean nano-coating layer Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D1/00—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances
- C09D1/02—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates
- C09D1/04—Coating compositions, e.g. paints, varnishes or lacquers, based on inorganic substances alkali metal silicates with organic additives
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/16—Antifouling paints; Underwater paints
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- the invention particularly relates to a method for preparing a highly wear-resistant and easy-to-clean nano-coating.
- An easy-to-clean surface is a surface on which surface contaminants or dust can fall off automatically under the action of gravity or rain, wind or the like, or can be easily erased.
- the particles On a solid surface, the particles generally tend to adhere to substances that are less hydrophilic.
- the surface When the solid surface is coated with a super-hydrophilic coating, the surface is super-hydrophilic. After rinsing with water or rainwater falling on the surface of the coating, it can be completely spread out to remove dirt, thereby preventing the formation of water droplets on the solid surface rich in dirt and water streaks, and avoiding the influence of cleanliness of the solid surface.
- the super-hydrophilic phenomenon was unexpectedly discovered by TOTO in 1995.
- the TiO 2 /SiO 2 film was super-hydrophilic by ultraviolet light irradiation.
- Fujishima first proposed the concept of "super-hydrophilic". It is generally considered that the contact angle of the surface of the object with water is less than or equal to 5° and is said to be super-hydrophilic. Imitating some hydrophilic and easy-to-clean phenomena in nature, chemical modification and geometric structure on the surface of the object.
- the surface with high polarity and rough “trench structure” or microporous structure can make the surface of the object have long-lasting super-hydrophilicity. Lipophilic.
- a preparation method of a high wear-resistant and easy-cleaning nano coating comprises the following steps: 10-15 parts of lithium silicate, 20-26 parts of sodium silicate, 15-20 parts of potassium silicate, 6-12 parts of silica sol, 3-7 parts of alumina sol, 2-5 parts of nano zirconia are sequentially added to 70-80 parts of distilled water, mixed at 400r/min for 20-40 minutes, and then 5-9 parts of aluminum phosphate, 7-11 parts of triethanolamine and 2 - 4 parts of the modified silicone mixture is slowly added dropwise to the above solution, mixed at 400r / min for 30-50min, and then filtered with a 400 mesh filter cloth to obtain a nano-coating; the stainless steel surface is treated with NOVclean stainless steel cleaning agent Ultrasonic cleaning to a hydrophilic state, rinse off the cleaning agent with deionized water, put it into a drying oven at 85-95 ° C, and dry the surface of the substrate, take it out; spray the nano-coating onto the stainless steel surface with low pressure and low flow of the spray gun
- the weight fraction of the nano zirconia is 3.5.
- the modified siloxane has a weight fraction of 3.
- a drying oven at 90 ° C is placed.
- the substrate is baked in a drying oven at 45 ° C for 30 min.
- baking in a drying oven at 160 ° C for 1.5 h Preferably, baking in a drying oven at 160 ° C for 1.5 h.
- the coating prepared by the method has good wear resistance and long-lasting effect, and can be applied to a metal surface such as stainless steel having a smooth surface to provide long-term protection and easy cleaning.
- a method for preparing a highly wear-resistant and easy-cleaning nano-coating comprising the steps of: 12 parts of lithium silicate, 23 parts of sodium silicate, 17 parts of potassium silicate, 9 parts of silica sol, 5 parts of alumina sol, 3.5 parts Nano zirconia is sequentially added to 75 parts of distilled water, mixed at 400r/min for 30min, and then a mixture of 7 parts of aluminum phosphate, 9 parts of triethanolamine and 3 parts of modified siloxane is slowly added dropwise to the above solution, to 400r /min mixed for 40min, then filtered with a 400 mesh filter cloth to obtain a nano-coating; the stainless steel surface was ultrasonically cleaned to a hydrophilic state with a NOVclean stainless steel cleaning agent, and the cleaning agent was rinsed off with deionized water and placed in a drying oven at 90 ° C.
- a preparation method of a high wear-resistant and easy-cleaning nano coating comprises the following steps: 10 parts of lithium silicate, 20 parts of sodium silicate, 15 parts of potassium silicate, 6 parts of silica sol, 3 parts of alumina sol, 2 parts Nano zirconia is sequentially added to 70 parts of distilled water, mixed at 400r/min for 20min, and then a mixture of 5 parts of aluminum phosphate, 7 parts of triethanolamine and 2 parts of modified siloxane is slowly added dropwise to the above solution, to 400r /min mixed for 30min, then filtered with a 400 mesh filter cloth to obtain nano-coating; the stainless steel surface was ultrasonically cleaned to a hydrophilic state with NOVclean stainless steel cleaning agent, rinsed off with deionized water, and placed in a drying oven at 85 ° C.
- each raw material is in parts by weight.
- a preparation method of a high wear-resistant and easy-cleaning nano coating comprises the following steps: 15 parts of lithium silicate, 26 parts of sodium silicate, 20 parts of potassium silicate, 12 parts of silica sol, 7 parts of alumina sol, 5 parts Nano zirconia is sequentially added to 80 parts of distilled water, mixed at 400r/min for 40min, and then a mixture of 9 parts of aluminum phosphate, 11 parts of triethanolamine and 4 parts of modified siloxane is slowly added dropwise to the above solution, to 400r /min mixed for 50min, then filtered with a 400 mesh filter cloth to obtain nano-coating; the stainless steel surface was ultrasonically cleaned to a hydrophilic state with NOVclean stainless steel cleaning agent, rinse off the cleaning agent with deionized water, and put it into 95 ° C Drying box, after the surface of the substrate is dry, take out; use the low pressure and low flow rate of the spray gun to spray the nano-coating onto the stainless steel surface, then put the substrate into a 50 ° C drying oven
- the coating prepared by the method has good wear resistance and long-lasting effect, and can be applied to a metal surface such as stainless steel having a smooth surface to provide long-term protection and easy cleaning.
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Abstract
Disclosed is a preparation method for a high wear-resistant and easy-to-clean nano-coating layer, comprising the following steps: adding 10-15 parts of lithium silicate, 20-26 parts of sodium silicate, 15-20 parts of potassium silicate, 6-12 parts of a silicon sol, 3-7 parts of an alumina sol, and 2-5 parts of nano-zirconia to 70-80 parts of distilled water in sequence, slowly dropwise adding a mixed solution of 5-9 parts of aluminium phosphate, 7-11 parts of triethanolamine and 2-4 parts of modified siloxane to the solution, and then filtering same to obtain a nano-coating; washing a stainless steel surface with a stainless steel cleaner until same is in a hydrophilic state, rinsing the cleaner off with deionized water, placing same into a drying cabinet, and taking same out after the surface of the substrate is dried; spray coating the nano-coating onto the surface of the stainless steel using a spray gun at a low pressure and a low flow, and then placing the substrate into a drying cabinet at 40ºC-50ºC for baking, and then transferring same into a drying cabinet at 150ºC-170ºC for baking for 1-2 h, and cooling same to room temperature, to obtain the high wear-resistant and easy-to-clean nano-coating layer. The coating layer prepared by the method has good wear resistance and long ageing, and is easy to clean.
Description
本发明具体涉及一种高耐磨易清洁纳米涂层的制备方法。The invention particularly relates to a method for preparing a highly wear-resistant and easy-to-clean nano-coating.
近年来，随着人们对生活质量要求的不断提高以及环保和节能意识的不断增强，具有易清洁功能的表面得到迅速发展。易清洁表面是指表面的污染物或灰尘在重力或雨水、风力等外力作用下能够自动脱落或者能被轻易擦除的一种表面。而在固体表面上，颗粒一般会趋于附着亲水性小的物质上。当固体表面涂上超亲水涂层后，表面达到超亲水性。用水冲洗或雨水落在涂层表面上之后能够完全铺展开而带走污物，从而防止固体表面形成水滴富含污垢和形成水条纹，避免影响固体表面清洁度。超亲水现象是TOTO公司在1995年意外发现TiO2/SiO2薄膜经紫外光照射而具有超亲水性。至2000年Fujishima首次提出了“超亲水”的概念。一般认为物体表面与水的接触角小于等于5°称为具有超亲水性。模仿自然界一些亲水易洁的现象，在物体表面进行化学物质修饰和几何结构构造，极性较高的表面配合粗糙的“沟槽结构”或者微孔结构可以使物体表面具有长久的超亲水亲油性。ShuSong等[8]采用十二烷基苯磺酸钠对二氧化钛粒子进行改性，并将涂布在ITO导电玻璃上，形成的薄膜在无紫外光照射时依然具有超亲水性。但这种涂层时效性短，耐磨性较差。In recent years, with the continuous improvement of people's quality of life requirements and the increasing awareness of environmental protection and energy conservation, the surface with easy cleaning function has been rapidly developed. An easy-to-clean surface is a surface on which surface contaminants or dust can fall off automatically under the action of gravity or rain, wind or the like, or can be easily erased. On a solid surface, the particles generally tend to adhere to substances that are less hydrophilic. When the solid surface is coated with a super-hydrophilic coating, the surface is super-hydrophilic. After rinsing with water or rainwater falling on the surface of the coating, it can be completely spread out to remove dirt, thereby preventing the formation of water droplets on the solid surface rich in dirt and water streaks, and avoiding the influence of cleanliness of the solid surface. The super-hydrophilic phenomenon was unexpectedly discovered by TOTO in 1995. The TiO 2 /SiO 2 film was super-hydrophilic by ultraviolet light irradiation. By 2000, Fujishima first proposed the concept of "super-hydrophilic". It is generally considered that the contact angle of the surface of the object with water is less than or equal to 5° and is said to be super-hydrophilic. Imitating some hydrophilic and easy-to-clean phenomena in nature, chemical modification and geometric structure on the surface of the object. The surface with high polarity and rough “trench structure” or microporous structure can make the surface of the object have long-lasting super-hydrophilicity. Lipophilic. ShuSong et al [8] modified the titanium dioxide particles with sodium dodecylbenzene sulfonate and applied it onto ITO conductive glass to form a film that was super-hydrophilic when exposed to UV light. However, this coating has a short timeliness and poor wear resistance.
发明内容Summary of the invention
本发明的目的在于提供一种高耐磨易清洁纳米涂层的制备方法。It is an object of the present invention to provide a method of preparing a highly abrasion resistant and easy to clean nanocoating.
本发明通过下面技术方案实现：The invention is achieved by the following technical solutions:
一种高耐磨易清洁纳米涂层的制备方法，包括如下步骤：将10-15份硅酸锂、20-26份硅酸钠、15-20份硅酸钾、6-12份硅溶胶、3-7份氧化铝溶胶、2-5份纳米氧化锆依次加入到70-80份蒸馏水中，400r/min混合20-40min，再将5-9份磷酸铝、7-11份三乙醇胺和2-4份改性硅氧烷的混合液慢慢滴加到上述溶液中，以400r/min混合30-50min，然后用400目滤布过滤，得纳米涂料；将不锈钢表面用NOVclean不锈钢清洗剂经超声波清洗至亲水状态，用去离子水冲洗掉清洗剂，放入85-95℃的干燥箱，待基材表面干燥，取出；使用喷枪低压低流量将纳米涂料喷涂到不锈钢表面，然后将基材放入40-50℃干燥箱烘烤20-40min，再转入150-170℃干燥箱烘烤1-2h，取出冷却至室温即得；各原料均为重量份。A preparation method of a high wear-resistant and easy-cleaning nano coating comprises the following steps: 10-15 parts of lithium silicate, 20-26 parts of sodium silicate, 15-20 parts of potassium silicate, 6-12 parts of silica sol, 3-7 parts of alumina sol, 2-5 parts of nano zirconia are sequentially added to 70-80 parts of distilled water, mixed at 400r/min for 20-40 minutes, and then 5-9 parts of aluminum phosphate, 7-11 parts of triethanolamine and 2 - 4 parts of the modified silicone mixture is slowly added dropwise to the above solution, mixed at 400r / min for 30-50min, and then filtered with a 400 mesh filter cloth to obtain a nano-coating; the stainless steel surface is treated with NOVclean stainless steel cleaning agent Ultrasonic cleaning to a hydrophilic state, rinse off the cleaning agent with deionized water, put it into a drying oven at 85-95 ° C, and dry the surface of the substrate, take it out; spray the nano-coating onto the stainless steel surface with low pressure and low flow of the spray gun, then base The material is baked in a 40-50 ° C drying oven for 20-40 min, then transferred to a 150-170 ° C drying oven for 1-2 h, taken out and cooled to room temperature; each raw material is in parts by weight.
优选地，所述的制备方法中，纳米氧化锆的重量份为3.5。Preferably, in the preparation method, the weight fraction of the nano zirconia is 3.5.
优选地，所述的制备方法中，改性硅氧烷的重量份为3。Preferably, in the preparation method, the modified siloxane has a weight fraction of 3.
优选地，所述的制备方法中，放入90℃的干燥箱。
Preferably, in the preparation method, a drying oven at 90 ° C is placed.
优选地，所述的制备方法中，将基材放入45℃干燥箱烘烤30min。Preferably, in the preparation method, the substrate is baked in a drying oven at 45 ° C for 30 min.
优选地，所述的制备方法中，160℃干燥箱烘烤1.5h。Preferably, in the preparation method, baking in a drying oven at 160 ° C for 1.5 h.
本发明技术效果：The technical effect of the invention:
该方法制得的涂层耐磨性好、时效久，涂覆在表面光滑的不锈钢等金属表面可以起到长效保护、易清洁的作用。The coating prepared by the method has good wear resistance and long-lasting effect, and can be applied to a metal surface such as stainless steel having a smooth surface to provide long-term protection and easy cleaning.
下面结合实施例具体介绍本发明的实质性内容。The substantial content of the present invention will be specifically described below with reference to the embodiments.
实施例1Example 1
一种高耐磨易清洁纳米涂层的制备方法，包括如下步骤：将12份硅酸锂、23份硅酸钠、17份硅酸钾、9份硅溶胶、5份氧化铝溶胶、3.5份纳米氧化锆依次加入到75份蒸馏水中，400r/min混合30min，再将7份磷酸铝、9份三乙醇胺和3份改性硅氧烷的混合液慢慢滴加到上述溶液中，以400r/min混合40min，然后用400目滤布过滤，得纳米涂料；将不锈钢表面用NOVclean不锈钢清洗剂经超声波清洗至亲水状态，用去离子水冲洗掉清洗剂，放入90℃的干燥箱，待基材表面干燥，取出；使用喷枪低压低流量将纳米涂料喷涂到不锈钢表面，然后将基材放入45℃干燥箱烘烤30min，再转入160℃干燥箱烘烤1.5h，取出冷却至室温即得；各原料均为重量份。A method for preparing a highly wear-resistant and easy-cleaning nano-coating comprising the steps of: 12 parts of lithium silicate, 23 parts of sodium silicate, 17 parts of potassium silicate, 9 parts of silica sol, 5 parts of alumina sol, 3.5 parts Nano zirconia is sequentially added to 75 parts of distilled water, mixed at 400r/min for 30min, and then a mixture of 7 parts of aluminum phosphate, 9 parts of triethanolamine and 3 parts of modified siloxane is slowly added dropwise to the above solution, to 400r /min mixed for 40min, then filtered with a 400 mesh filter cloth to obtain a nano-coating; the stainless steel surface was ultrasonically cleaned to a hydrophilic state with a NOVclean stainless steel cleaning agent, and the cleaning agent was rinsed off with deionized water and placed in a drying oven at 90 ° C. After the surface of the substrate is dry, take out; use the low pressure and low flow rate of the spray gun to spray the nano paint onto the stainless steel surface, then bake the substrate in a 45 ° C oven for 30 min, then transfer to a 160 ° C oven for 1.5 h, remove and cool to It is available at room temperature; each raw material is in parts by weight.
实施例2Example 2
一种高耐磨易清洁纳米涂层的制备方法，包括如下步骤：将10份硅酸锂、20份硅酸钠、15份硅酸钾、6份硅溶胶、3份氧化铝溶胶、2份纳米氧化锆依次加入到70份蒸馏水中，400r/min混合20min，再将5份磷酸铝、7份三乙醇胺和2份改性硅氧烷的混合液慢慢滴加到上述溶液中，以400r/min混合30min，然后用400目滤布过滤，得纳米涂料；将不锈钢表面用NOVclean不锈钢清洗剂经超声波清洗至亲水状态，用去离子水冲洗掉清洗剂，放入85℃的干燥箱，待基材表面干燥，取出；使用喷枪低压低流量将纳米涂料喷涂到不锈钢表面，然后将基材放入40℃干燥箱烘烤20min，再转入150℃干燥箱烘烤1h，取出冷却至室温即得；各原料均为重量份。A preparation method of a high wear-resistant and easy-cleaning nano coating comprises the following steps: 10 parts of lithium silicate, 20 parts of sodium silicate, 15 parts of potassium silicate, 6 parts of silica sol, 3 parts of alumina sol, 2 parts Nano zirconia is sequentially added to 70 parts of distilled water, mixed at 400r/min for 20min, and then a mixture of 5 parts of aluminum phosphate, 7 parts of triethanolamine and 2 parts of modified siloxane is slowly added dropwise to the above solution, to 400r /min mixed for 30min, then filtered with a 400 mesh filter cloth to obtain nano-coating; the stainless steel surface was ultrasonically cleaned to a hydrophilic state with NOVclean stainless steel cleaning agent, rinsed off with deionized water, and placed in a drying oven at 85 ° C. After the surface of the substrate is dry, take out; use the low pressure and low flow rate of the spray gun to spray the nano-coating onto the stainless steel surface, then put the substrate into a 40 ° C drying oven for 20 minutes, then transfer to a 150 ° C drying oven for 1 hour, remove and cool to room temperature. That is, each raw material is in parts by weight.
实施例3Example 3
一种高耐磨易清洁纳米涂层的制备方法，包括如下步骤：将15份硅酸锂、26份硅酸钠、20份硅酸钾、12份硅溶胶、7份氧化铝溶胶、5份纳米氧化锆依次加入到80份蒸馏水中，400r/min混合40min，再将9份磷酸铝、11份三乙醇胺和4份改性硅氧烷的混合液慢慢滴加到上述溶液中，以400r/min混合50min，然后用400目滤布过滤，得纳米涂料；将不锈钢表面用NOVclean不锈钢清洗剂经超声波清洗至亲水状态，用去离子水冲洗掉清洗剂，放入95℃
的干燥箱，待基材表面干燥，取出；使用喷枪低压低流量将纳米涂料喷涂到不锈钢表面，然后将基材放入50℃干燥箱烘烤40min，再转入170℃干燥箱烘烤2h，取出冷却至室温即得；各原料均为重量份。A preparation method of a high wear-resistant and easy-cleaning nano coating comprises the following steps: 15 parts of lithium silicate, 26 parts of sodium silicate, 20 parts of potassium silicate, 12 parts of silica sol, 7 parts of alumina sol, 5 parts Nano zirconia is sequentially added to 80 parts of distilled water, mixed at 400r/min for 40min, and then a mixture of 9 parts of aluminum phosphate, 11 parts of triethanolamine and 4 parts of modified siloxane is slowly added dropwise to the above solution, to 400r /min mixed for 50min, then filtered with a 400 mesh filter cloth to obtain nano-coating; the stainless steel surface was ultrasonically cleaned to a hydrophilic state with NOVclean stainless steel cleaning agent, rinse off the cleaning agent with deionized water, and put it into 95 ° C
Drying box, after the surface of the substrate is dry, take out; use the low pressure and low flow rate of the spray gun to spray the nano-coating onto the stainless steel surface, then put the substrate into a 50 ° C drying oven for 40 minutes, then transfer it to a 170 ° C drying oven for 2 hours. It is taken out and cooled to room temperature; each raw material is part by weight.
该方法制得的涂层耐磨性好、时效久，涂覆在表面光滑的不锈钢等金属表面可以起到长效保护、易清洁的作用。
The coating prepared by the method has good wear resistance and long-lasting effect, and can be applied to a metal surface such as stainless steel having a smooth surface to provide long-term protection and easy cleaning.
Claims (6)
- 一种高耐磨易清洁纳米涂层的制备方法，其特征在于包括如下步骤：将10-15份硅酸锂、20-26份硅酸钠、15-20份硅酸钾、6-12份硅溶胶、3-7份氧化铝溶胶、2-5份纳米氧化锆依次加入到70-80份蒸馏水中，400r/min混合20-40min，再将5-9份磷酸铝、7-11份三乙醇胺和2-4份改性硅氧烷的混合液慢慢滴加到上述溶液中，以400r/min混合30-50min，然后用400目滤布过滤，得纳米涂料；将不锈钢表面用NOVclean不锈钢清洗剂经超声波清洗至亲水状态，用去离子水冲洗掉清洗剂，放入85-95℃的干燥箱，待基材表面干燥，取出；使用喷枪低压低流量将纳米涂料喷涂到不锈钢表面，然后将基材放入40-50℃干燥箱烘烤20-40min，再转入150-170℃干燥箱烘烤1-2h，取出冷却至室温即得；各原料均为重量份。A method for preparing a high wear-resistant and easy-cleaning nano-coating, comprising the steps of: 10-15 parts of lithium silicate, 20-26 parts of sodium silicate, 15-20 parts of potassium silicate, 6-12 parts Silica sol, 3-7 parts of alumina sol, 2-5 parts of nano zirconia are sequentially added to 70-80 parts of distilled water, mixed at 400r/min for 20-40 minutes, and then 5-9 parts of aluminum phosphate, 7-11 parts of three A mixture of ethanolamine and 2-4 parts of modified siloxane is slowly added dropwise to the above solution, mixed at 400 r/min for 30-50 min, and then filtered with a 400 mesh filter cloth to obtain a nano-coating; the stainless steel surface is made of NOVclean stainless steel. The cleaning agent is ultrasonically cleaned to a hydrophilic state, and the cleaning agent is rinsed off with deionized water, placed in a drying oven at 85-95 ° C, and the surface of the substrate is dried and taken out; the nano-coating is sprayed onto the stainless steel surface using a low-pressure low-flow of the spray gun. Then, the substrate is baked in a drying oven at 40-50 ° C for 20-40 min, then transferred into a drying oven at 150-170 ° C for 1-2 h, and taken out and cooled to room temperature; each raw material is in parts by weight.
- 根据权利要求1所述的制备方法，其特征在于：纳米氧化锆的重量份为3.5。The method according to claim 1, wherein the weight fraction of the nano zirconia is 3.5.
- 根据权利要求1所述的制备方法，其特征在于：改性硅氧烷的重量份为3。The process according to claim 1, wherein the modified siloxane has a weight fraction of 3.
- 根据权利要求1所述的制备方法，其特征在于：放入90℃的干燥箱。The preparation method according to claim 1, wherein a drying oven at 90 ° C is placed.
- 根据权利要求1所述的制备方法，其特征在于：将基材放入45℃干燥箱烘烤30min。The preparation method according to claim 1, wherein the substrate is baked in a drying oven at 45 ° C for 30 minutes.
- 根据权利要求1所述的制备方法，其特征在于：160℃干燥箱烘烤1.5h。 The preparation method according to claim 1, characterized in that the drying oven is baked at 160 ° C for 1.5 hours.
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|---|---|---|---|---|
| CN111978764A (en) * | 2020-09-08 | 2020-11-24 | 孟中嫄 | Heat-insulation heat-preservation high-temperature-resistant coating for Q235B steel surface and preparation method thereof |
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| CN111978764B (en) * | 2020-09-08 | 2022-01-07 | 孟中嫄 | Heat-insulation heat-preservation high-temperature-resistant coating for Q235B steel surface and preparation method thereof |
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