纯聚脲防护涂层的耐海水腐蚀性研究
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摘要
研究了两种纯聚脲涂层(QF-163涂层和QF-165涂层)在120d海水浸泡环境下力学性能和表面性能的变化规律,并结合傅里叶红外光谱(FT-IR)观察涂层腐蚀前后内部化学键的变化。力学性能研究结果表明,海水浸泡120d后,QF-163涂层拉伸强度下降13.59%,断裂伸长率下降23.15%,硬度变化幅度较小,增加1.10%;QF-165涂层拉伸强度下降13.29%,断裂伸长率下降8.66%,硬度增加1.10%。表面性能研究结果表明,两种涂层的接触角均随浸泡时间的增长而减小,表面能则均增大,浸泡120d后,QF-163涂层接触角下降7.77%,QF-165涂层下降4.46%。FT-IR微观结果表明QF-163和QF-165纯聚脲涂层内部化学键均没有出现明显的断键现象,涂层均具有较好的耐海水浸泡腐蚀能力。
In this paper,the changes of mechanical properties and surface properties of two pure polyurea coatings(QF-163 coating and QF-165 coating)in seawater immersion environment with 120 days were studied.The changes of internal chemical bonds before and after coating corrosion were observed with Fourier infrared spectroscopy(FT-IR).The results of mechanical properties study showed that after 120 days of seawater immersion,the tensile strength of QF-163 coating decreased by 13.59%,the elongation at break decreased by 23.15%and the hardness changed slightly and increased by 1.10%,while the tensile strength of QF-165 coating decreased by 13.29%,the elongation at break decreased by 8.66%,and the hardness increased by 1.10%.Surface performance results showed that contact angles of both kinds of coating decreased with the increase of immersion time,but surface energy were both increased.After soaking 120 d,the contact angle of QF-163 coating decreased by 7.77% and that QF-165 coating decreased by 4.46%.FT-IR microscopic results showed that there was no obvious fracture phenomenon in the internal chemical bonds of QF-163 pure polyurea coating and QF-165 pure polyurea coating,and the coatings had good corrosion resistance to seawater immersion.
In this paper,the changes of mechanical properties and surface properties of two pure polyurea coatings(QF-163 coating and QF-165 coating)in seawater immersion environment with 120 days were studied.The changes of internal chemical bonds before and after coating corrosion were observed with Fourier infrared spectroscopy(FT-IR).The results of mechanical properties study showed that after 120 days of seawater immersion,the tensile strength of QF-163 coating decreased by 13.59%,the elongation at break decreased by 23.15%and the hardness changed slightly and increased by 1.10%,while the tensile strength of QF-165 coating decreased by 13.29%,the elongation at break decreased by 8.66%,and the hardness increased by 1.10%.Surface performance results showed that contact angles of both kinds of coating decreased with the increase of immersion time,but surface energy were both increased.After soaking 120 d,the contact angle of QF-163 coating decreased by 7.77% and that QF-165 coating decreased by 4.46%.FT-IR microscopic results showed that there was no obvious fracture phenomenon in the internal chemical bonds of QF-163 pure polyurea coating and QF-165 pure polyurea coating,and the coatings had good corrosion resistance to seawater immersion.
引文
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[2] Gu H S,Itoh Y.Ageing behaviour of natural rubber and high damping rubber materials used in bridge rubber bearings[J].Advances in Structural Engineering,2010,13(6):1105-1113.
[3] Huang Weibo.Spray polyurea elastomer technology[M].Beijing:Chemical industry press,2005:5-6(in Chinese).黄微波.喷涂聚脲弹性体技术[M].北京:化学工业出版社,2005:5-6.
[4] Huang Weibo,Liu Xudong,Lyu Ping,et al.Key point analysis of Beijing-Shanghai high speed railway polyurea protective project[J].Journal of Modern Paint and Finishing,2012,15(8):11-15(in Chinese).黄微波,刘旭东,吕平,等.京沪高速铁路聚脲防护工程要点剖析[J].现代涂料与涂装,2012,15(8):11-15.
[5] Lyu Ping,Shi Shifan,Xiang Jiayu,et al.Spray pure polyurea technology applied to improving the durability of concrete cross-sea bridge[J].Journal of Concrete,2012(8):119-121(in Chinese).吕平,史世凡,向佳瑜,等.采用喷涂聚脲技术提高跨海大桥混凝土耐久性[J].混凝土,2012(8):119-121.
[6] Lyu Ping,Li Zhigao,Zhang Jing.Anti-corrosion behaviors of polyurea coating in acid,alkali and salt solution[J].Journal of Corrosion and Protection,2011,32(2):103-106(in Chinese).吕平,李志高,张静.聚脲涂层的耐酸、碱、盐腐蚀试验及结果[J].腐蚀与防护,2011,32(2):103-106.
[7] Lyu Ping.Study on the novel polyaspartic ester based polyurea coatings for marine concrete protection[D].Qingdao:Ocean University of China,2007(in Chinese).吕平.海洋混凝土防护用新型聚天冬氨酸酯聚脲涂层的研究[D].青岛:中国海洋大学,2007.
[8] Huang Weibo,Hu Xiao,Xu Fei.Research progress of protection technologies for scour-abrasion resistance of hydraulic concrete[J].Journal of Water Resources and Hydropower Engineering,2014,4(2):61-63(in Chinese).黄微波,胡晓,徐菲.水工混凝土抗冲耐磨防护技术研究进展[J].水利水电技术,2014,45(2):61-63.
[9] Huang Weibo,Xiang Jiayu,Liu Xudong.Polyurea technology applied to post-earthquake disasters for defencing[J].Journal of Earthquake Resistant Engineering and Retrofitting,2012,34(2):115-118(in Chinese).黄微波,向佳瑜,刘旭东.应用聚脲技术实现地震次生灾害的防御[J].工程抗震与加固改造,2012,34(2):115-118.
[10] Huang Weibo,Xiang Jiayu,Jiang Linlin,et al.Study on pure polyurea protective technology and applications of hydraulic engineering[J].Journal of New Building Materials,2012,39(4):7-9(in Chinese).黄微波,向佳瑜,姜琳琳,等.水利工程防护用纯聚脲技术研究及应用[J].新型建筑材料,2012,39(4):7-9.
[11] Lyu Ping,He Xiaoshan,Huang Weibo,et al.Study on anticorrosive performance of protectiverubber and polyurea qtech used in bridge bearings[J].Journal of Paint and Coatings Industry,2015,45(10):1-6(in Chinese).吕平,何筱姗,黄微波,等.桥梁支座防护橡胶与喷涂聚脲耐介质腐蚀性能的研究[J].涂料工业,2015,45(10):1-6.
[12] Li Zhigao.Studies on the novel polyurea material for Qingdao Bay Bridge concrete protection[D].Qingdao:Qingdao University of Technology,2010(in Chinese).李志高.青岛海湾大桥混凝土防护用新型聚脲材料性能研究[D].青岛:青岛理工大学,2010.
[13] Li Haiyang.Research on the application of polyuria protective technology for Hong Kong-Zhuhai-Macao bridge concrete[D].Qingdao:Qingdao University of Technology,2014(in Chinese).李海扬.港珠澳大桥混凝土聚脲防护技术应用的研究[D].青岛:青岛理工大学,2014.
[14] Li Xinmao.study on polyurea protective coating for weather resistance and corrosion resistance[D].Qingdao:Qingdao University of Technology,2011.(in Chinese).李鑫茂.聚脲防护涂层耐候老化及耐介质腐蚀性能研究[D].青岛:青岛理工大学,2011.