锌粉改性硅酮密封胶吸水性及抗水渗透性研究
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摘要
以107胶为基础,制备一系列含有不同质量分数锌粉(质量分数分别为1%、3%、5%、10%、15%、20%)的硅酮密封胶,并制备出固化样品,参照GB/T 1034-2008,分别进行在3. 5%NaCl溶液和去离子水中浸泡水的过程重量变化试验,及样品浸水10天(d)后的金相分析,分析胶样的吸水性、抗水渗透性以及锌粉在胶中的化学变化。结果表明,硅酮胶掺入适量的锌粉,锌在硅酮胶浸水过程中发生腐蚀,腐蚀产物有效填充材料结构的孔隙,能有效提升硅酮密封胶的抗水渗透性。
A series of silicone sealant containing different mass fraction zinc powders were prepared on the basis of 107 glue,and solidified samples were prepared,the experiment were done that the weight changes in the process of soaking in 3. 5% NaCl solution and deionized water respectively according to GB/T 1034-2008,and the metallographic analysis of samples after soaking for 10 days. The water absorption and water penetration resistance of the silicone sealant sample and the chemical changes of zinc powder in the sealant were analyzed. The experimental results showed that zinc had been corroded during soaking after silicone sealant mixed with the appropriate amount of zinc powder,and the corrosion product effectively filled the mesh of the material structure. This corrosive effect of zinc could effectively enhance the water penetration resistance of silicone sealant.
A series of silicone sealant containing different mass fraction zinc powders were prepared on the basis of 107 glue,and solidified samples were prepared,the experiment were done that the weight changes in the process of soaking in 3. 5% NaCl solution and deionized water respectively according to GB/T 1034-2008,and the metallographic analysis of samples after soaking for 10 days. The water absorption and water penetration resistance of the silicone sealant sample and the chemical changes of zinc powder in the sealant were analyzed. The experimental results showed that zinc had been corroded during soaking after silicone sealant mixed with the appropriate amount of zinc powder,and the corrosion product effectively filled the mesh of the material structure. This corrosive effect of zinc could effectively enhance the water penetration resistance of silicone sealant.
引文
[1]沈春林.中国防水材料现状和发展建议[J].建材发展导向,2005(1):5-9.
[2]万小梅,李淑进,赵铁军.防水密封材料新进展[J].海岸工程,2000,19(3):67-75.
[3]冯巧,郭晨婷,丁伟娜,等.硅烷偶联剂改性建筑硅酮密封胶的研究[J].中国胶粘剂,2015,24(7):26-30.
[4]王旭东,张燕红.高位移能力硅酮耐候密封胶的性能与应用[J].中国建筑防水,2007(3):19-21.
[5]吴霁虹,于清章,郭积铖.影响富锌底漆防腐性能的因素分析[J].现代涂料与涂装,2008,11(9):13-15.
[6]孙中新,李继航,刘继宪,等.有机硅涂料防水性能研究[J].上海涂料,1999(2):7-9.
[7]翁永基.锌基防护层的保护机理及其使用特性[J].腐蚀科学与防护技术,1993,5(1):66-69.
[8]方志刚,黄一.采用电化学交流阻抗等测试方法研究无机富锌与有机富锌涂层在海水腐蚀环境中的失效机理[J].现代仪器,2011,17(3):49-51.
[9]章小鸽.锌和锌合金的腐蚀[J].腐蚀与防护,2006,27(2):97-108.
[2]万小梅,李淑进,赵铁军.防水密封材料新进展[J].海岸工程,2000,19(3):67-75.
[3]冯巧,郭晨婷,丁伟娜,等.硅烷偶联剂改性建筑硅酮密封胶的研究[J].中国胶粘剂,2015,24(7):26-30.
[4]王旭东,张燕红.高位移能力硅酮耐候密封胶的性能与应用[J].中国建筑防水,2007(3):19-21.
[5]吴霁虹,于清章,郭积铖.影响富锌底漆防腐性能的因素分析[J].现代涂料与涂装,2008,11(9):13-15.
[6]孙中新,李继航,刘继宪,等.有机硅涂料防水性能研究[J].上海涂料,1999(2):7-9.
[7]翁永基.锌基防护层的保护机理及其使用特性[J].腐蚀科学与防护技术,1993,5(1):66-69.
[8]方志刚,黄一.采用电化学交流阻抗等测试方法研究无机富锌与有机富锌涂层在海水腐蚀环境中的失效机理[J].现代仪器,2011,17(3):49-51.
[9]章小鸽.锌和锌合金的腐蚀[J].腐蚀与防护,2006,27(2):97-108.