制备了一种应用于冷轧板表面的无机与有机硅树脂复合的钝化液。采用浸渍法将其涂布于DC01型冷轧板表面形成一层无机与有机硅烷复合杂化膜。研究了钝化液体系中金属离子比例、硅烷偶联剂之间的比例对冷轧板耐腐蚀性的影响,对涂覆在冷轧板上无机与有机硅烷复合杂化膜的硬度、附着力、耐腐蚀性等进行了分析,并通过红外光谱、电化学腐蚀、热重及扫描电镜对杂化膜进行形貌和结构表征。结果表明:当钝化液中Zn(NO3)2/Mn(NO3)2为1:1;甲基三甲氧基硅烷/环氧丙氧丙基三甲氧基硅烷(MTMS/GPTMS)为1:1.6;聚氨酯树脂占10%、H2TiF6占0.5%、二氧化硅溶胶占5%。此时的钝化液性能达到最好,涂覆于冷轧板表面上所成膜光滑连续致密性好,可耐400℃以上的高温,膜的硬度达到4H,在基板上附着力为0级。
A passivating solution of inorganic and organic resin for cold rolled steel plate was prepared and coated on DC01 cold rolled steel plate by impregnation method to form a hybrid film of inorganic and organic silane.The influence of contents of metal ions and silane coupling agent on the corrosion resistance of cold rolled steel sheet was investigated.The hardness,adhesion and corrosion resistance of coated cold rolled steel sheet were analyzed.The morphology and structure of the hybrid membrane was characterized by infrared spectrum,electrochemical corrosion,thermogravimetric (TG) and scanning electron microscopy (SEM).The results showed that when the ratio of MTMS/GPTMS and Zn(NO3)2/Mn(NO3)2 in passivation solution were 1:1.6 and 1:1,respectively,and polyurethane resin accounted for 10%,H2TiF6 for 0.5%,Silica sol for 5%,the passivation liquid performance was the best.Meantime,the coated film was smooth,continual and dense.The hardness of the film,formed under the optimal condition,reached 4H,the adhesion was 0,and the resistance temperature was up to 400℃.
[1] 陈立军,张心亚,陈焕钦.环保型防污涂料研究进展[J].化工新型材料,2005,33(7):43-46.
[2] 范洋洋,李盛鹏,张晨,等.铝合金表面耐蚀亲水膜的制备及性能[J].大连工业大学学报,2018,37(3):187-190.
[3] 姜祖林,高琦,刘颖.环保型钝化液的制备及性能研究[J].现代化工,2015,35(12):83-85,87.
[4] Bannai H,Okamoto Y,Nakamura K,et al.Aluminum or aluminum alloy material having surface treatment coating film,and surface treatment method thereof:US2013034743[P].2013-02-07.
[5] Dang D N,Peraudeau B,Cohendoz S.Effect of mechanical stresses on epoxy coating ageing approached by electrochemical impedance spectroscopy measurements[J].Electrochimica Acta,2013,124(4):80-89.
[6] Ismail L,Ramesh K.Performance of polyester/epoxy binder coating system-studies on coating resistance,adhesion and differential scanning calorimetry[J].Pigment & Resin Technology,2016,45(3):158-163.
[7] Saad G R,Eldin A F S.Isothermal cure kinetics of uncatalyzed and catalyzed diglycidyl ether of bisphenol-A/carboxylated polyester hybrid powder coating[J].Journal of Thermal Analysis and Calorimetry,2012,110(3):1425-1430.
[8] Ansari F,Naderi R,Dehghanian C.Study on the protective function of cloisite incorporated silane sol-gel coating cured at different conditions[J].Applied Clay Science,2015,114:93-102.
[9] 彭天兰,满瑞林,梁永煌.镀锌钢板硅烷与稀土铈盐、镧盐复合钝化的性能及机理[J].材料保护,2009,42(3):5-8,92.
[10] 张金涛,杨春勇,潘亮,等.2A12铝合金表面铈盐掺杂硅烷杂化膜在3.5% NaCl溶液中耐蚀性能的电化学研究[J].金属学报,2008,44(11):1372-1377.
[11] 胡吉明,王晓梅,季卫刚,等.防护性硅烷膜的掺杂改性研究进展[J].材料科学与工程学报,2008,26(5):794-797,828.
[12] 陈珊,陈仁霖,陈学群,等.钢材表面硅烷处理后的防腐蚀性能研究[J].材料保护,2008(4):24-26,2.
[13] 刘倞,胡吉明,张鉴清,等.金属表面硅烷化防护处理及其研究现状[J].中国腐蚀与防护学报,2006,26(1):59-64.
[14] 宣兆龙,易建政,杜仕国.金属防腐涂料的研究进展[J].现代化工,1999(4):23-26.
[15] 张焱琴,杨丽霞,谢鹏波.硅烷偶联剂在金属表面预处理中的应用研究进展[J].材料保护,2017,50(12):67-73.
[16] 高硕.钢结构的表面杂化膜制备与腐蚀性能研究[J].材料开发与应用,2018,33(6):51-55.
[17] Abrantes L M,Cordas C M,Vieil E.EQCM study of polypyrrole modified electrodes doped with Keggin-type heteropolyanion for cation detection Electrochim[J].Acta,2002,47:1481-1487.
[18] Nguyen T D,Nguyen T A,Pham M C,et al.Mechanism for protection of iron corrosion by an intrinsically electronic conducting polymer[J].Journal of Electroanalytical Chemistry,2004,572:225-234.
[19] Ananda Kumar S,Balakrishnana T,Alagar M,et al.Development and characterization of silicone/phosphorus modified epoxy materials and their application as anticorrosion and antifouling coatings[J].Progress in Organic Coatings,2006,55:207-217.
[20] Loveday D,Peterson P,Rodgers B.Evaluation of organic coatings with electrochemical impedance spectroscopy.part 3:protocols for testing coatings with EIS[J].Journal of Coatings Technology,2005,2:22-27.
[21] Criado M,Sobrados I,Sanz J.Polymerization of hybrid organic-inorganic materials from several silicon compounds followed by TGA/DTA,FT-IR and NMR techniques[J].Progress in Organic Coatings,2014,77:880-891.
基金资助
辽宁省自然科学基金项目(2019-MS-022);功能分子固体教育部重点实验室开放课题(FMS201906)
PDF
