煤矸石改性环氧涂层的制备及其防腐性能研究  

Preparation and Anticorrosion Performance of a Coal-gangue Modified Epoxy Coating

作　　者：陈丽[1,2] 冯佳[3] 孟凡帝 王福会 CHEN Li;FENG Jia;MENG Fandi;WANG Fuhui(Corrosion and Protection Center,Northeastern University,Shenyang 110819,China;High Performance Metal Materials and Protection Laboratory,Ningxia Institute of Science and Technology,Shizuishan 745260,China;China National Petroleum Corporation Changqing Oilfield Branch Ninth Oil Extraction Plant,Yinchuan 750000,China)

机构地区：[1]东北大学腐蚀与防护中心,沈阳110819 [2]宁夏理工学院高性能金属材料及防护技术联合实验室,石嘴山745260 [3]中国石油天然气股份有限公司长庆油田分公司第九采油厂,银川750000

出　　处：《中国腐蚀与防护学报》2025年第3期643-652,共10页Journal of Chinese Society For Corrosion and Protection

基　　金：国家自然科学基金(52271052和U20A20233);宁夏高校科研项目(NGY2022145);宁夏自然科学基金(2023AAC03363)。

摘　　要：为探索煤炭产业固废物煤矸石的高效利用途径,本文以环氧树脂E44为成膜物质、以经过刻蚀处理的煤矸石为填料制备煤矸石改性环氧树脂涂料,再将涂料涂刷于硅胶板和Q235钢工作面上分别制得自由膜样品和涂层金属样品。采用SEM对煤矸石的形貌和尺寸进行验证测试;采用吸水率测试、拉伸试验测试,附着力测试和电化学阻抗谱测试等方法对涂层性能进行研究。结果表明,煤矸石在环氧树脂中适量添加可以提高涂层的致密性、强度、韧性、附着力和防腐性能,但性能改善与煤矸石添加量之间呈非线性变化;当环氧树脂中煤矸石的添加量为5%时性能相对较好,断裂强度达35.30 MPa,最大应变达6.13%,在浸泡10 d后附着力损失率为58.65%,但仍保持相对高的低频阻抗模值3.40×10^(8)Ω·cm^(2)和涂层电阻6.36×10^(7)Ω·cm^(2)。Epoxy resin is a popular choice as the matrix of organic coatings in the metal protection sector.However,the single shielding effect of epoxy coatings is limited.One effective method to improve their protective properties is to add inorganic fillers to epoxy coatings.Coal gangue with a large number of micropores and a high specific surface area,is a rich source of alumina,silica,iron oxide,calcium oxide,magnesium oxide and other components.There are few relevant reports on the application of coal gangue in the field of anticorrosion at home and abroad.Therefore,expanding the application of coal gangue in the field of anticorrosion coating may be of significance in environmental benefits,technical application and innovation.Herein,the impact of coal gangue addition on the performance of epoxy coatings was studied with epoxy resin E44 as matrix and different proportions(1%,5%,and 10%in mass fraction)of coal gangue as fillers to prepare coal gangue-modified epoxy resin coatings.These coatings were subsequently applied to silica gel plates and Q235 mild steel surfaces,yielding samples of free coating film and coated steel.The average coating thickness was approximately 150μm.The morphology of coal gangue powders was revealed by means of JSM-7001F field emission scanning electron microscope as that the coal gangue presented multi lamellar structure with an average particle size of 3.18±0.12μm,which may be conductive to the improvement of the coating properties.Then,a series of tests were conducted to assess the performance of the coating,including a water absorption test,tensile test,adhesion test and electrochemical EIS test.The results showed that the addition of coal gangue to the epoxy resin in proper quantity can enhance the densification,strength,toughness,adhesion and anticorrosive properties of the coatings.However,the performance improvement showed non-linear dependence on the dosage of coal gangue;an excess addition of coal gangue can result in particle agglomeration,which may lead to an increase in defec

关 键 词：煤矸石 多层片状结构 屏蔽效应 防腐性能 

分 类 号：TG174[金属学及工艺—金属表面处理]