养兔场兔笼用Q235钢表面防锈蚀涂层的制备及其性能研究  

Preparation and Property of Anti-rust Coating on Q235 Steel Used for Warren Rabbit Hutch

作　　者：王海珠[1] 鲁庆东[1] 

机构地区：[1]宜宾职业技术学院,四川宜宾644003

出　　处：《表面技术》2016年第11期139-144,共6页Surface Technology

摘　　要：目的针对养兔场兔笼用Q235钢焊接处表面易锈蚀问题,利用带锈涂料在其表面制备防锈蚀涂层以提高其耐腐蚀能力。方法利用磷酸酯单体和丙烯酸及其脂类单体与乳化液混合得到防锈涂料,按照GB/T 4054—2008在Q235钢表面进行涂覆。通过划圈仪参照GB 1720—1979评价涂层结合力,依据GB/T 6739—2006利用铅笔硬度测定涂层的硬度,通过涡流测厚仪测定涂层厚度,通过烟雾试验、NMP试验、EIS试验、Machu试验评价涂层的耐蚀性能。结果在Q235钢表面制备的防锈蚀涂层与基体的结合力为1级,结合强度高,涂层硬度5级,厚度约为12μm,Machu试验结果表明涂层腐蚀区域较小,显示出较好的抗腐蚀性能。涂层试样经过120 h的NMP试验后依然保持较好的完整度,表现出较好的耐溶胀性能。EIS试验结果说明涂层试样阻抗模值明显低于Q235钢,体现出较好的耐蚀性能。试样涂层经过240 h的盐雾试验后保持完整,体现出较好的耐蚀性能。结论在Q235钢表面制备防锈蚀涂层后,试样的耐蚀性能得到大幅提高。The work aims to improve the corrosion resistance of welded surface of Q235 steel applied with antirust coating prepared by coating with rust, with respect to the problem of surface corrosion likely to occur thereon for warren rabbit hutch. Antirust coating was obtained by mixing phosphate, acrylic acid and its lipid monomers with the emulsified liquid. Coating was applied on the surface of Q235 steel in accordance with the standard（GB/T 4054—2008）. Binding force of coating was evaluated with circle-drawing instrument by reference to GB 1720—1979. Coating hardness was measured by the pencil hardness based on GB/T 6739—2006. Coating thickness was measured by eddy current thickness meter. The smoke test, NMP test, EIS test and Machu test were carried out to assess the corrosion resistance of the coating. The results showed that binding force of antirust coating prepared for Q235 steel surface and the substrate was c1 ass 1, with high bonding strength, class 5 coating hardness and thickness of about 12 μm. Machu test results showed that the smaller corroded coating area indicated relatively good corrosion resistance. The integrity of coated samples after 120 h NMP test remained good, showing good resistance to swelling. The results of EIS test showed that the impedance magnitude of the coating samples was obviously lower than Q235 steel, which showed better corrosion resistance. After 240 h salt spray test, the coating samples remained intact, reflecting better corrosion resistance. The results show that after antirust coating is prepared and applied on the surface of Q235 steel, the corrosion resistance of the samples is substantially improved.

关 键 词：Q235钢 防锈蚀涂层 涂层结合力 耐蚀性 NMP试验 盐雾试验 

分 类 号：TG172.2[金属学及工艺—金属表面处理]