漆酚钛涂层在模拟高温、高CO_(2)环境中的防护性能研究  

Study on Protective Performance of Urushiol Titanium Coating in the Simulated High Temperature and CO_(2) Environment

作　　者：谷丰 樊保民 张雷 宋楠 刘浩宇 赵晓乐 杜柱兵 赵景茂[2] GU Feng;FAN Bao-min;ZHANG Lei;SONG Nan;LIU Hao-yu;ZHAO Xiao-le;DU Zhu-bing;ZHAO Jing-mao(CNPC Engineering Construction Co.,Ltd.,Beijing Design Branch,Beijing 100085,China;College of Materials Science and Engineering,Beijing University of Chemical Technology,Beijing 100029,China)

机构地区：[1]中国石油集团工程建设有限公司北京设计分公司,北京100085 [2]北京化工大学材料科学与工程学院,北京100029

出　　处：《材料保护》2022年第4期14-19,共6页Materials Protection

摘　　要：为提升碳钢在高温、含CO_(2)环境盐水介质中的耐蚀性,采用钛酸四丁酯在丙二醇甲醚醋酸酯的增容条件下与漆酚交联形成漆酚钛涂料,并涂覆于碳钢基材表面制备高耐温涂层。通过热重分析明确了漆酚钛涂层的耐温性能;利用高温、高压且含CO_(2)介质浸泡试验,通过形貌与傅里叶变换红外光谱分析评价了涂层在模拟盐水中对碳钢的防护性能;使用电化学阻抗谱(EIS)评价了浸泡前后涂层在腐蚀介质中的阻抗变化。结果表明:漆酚钛涂层的热分解温度高达275.19℃;在140℃与155℃的模拟盐水溶液(CO_(2)分压2 MPa)中浸泡30 d后,涂层的低频阻抗值分别达到10^(11)Ω·cm^(2)与10^(10)Ω·cm^(2)数量级;涂层的价键特征未发生改变,表面形貌完整且与基材结合紧密,表现出优异的耐高温防护性能。For improving the corrosion resistance of carbon steel in the saline medium with high temperature and CO_(2)-containing environment,tetrabutyl titanate was used to crosslink with urushiol under the compatibilization condition of propylene glycol methyl ether acetate to form a urushiol titanium coating,which was coated on carbon steel substrate surface for preparing high temperature resistant coating.Subsequently,thermogravimetry(TG)was employed to determine the thermal-resistant of urushiol titanium coating.The morphological and Fourier transform infrared spectroscopy(FTIR)were conducted to evaluate the protective capacity of the coating on carbon steel in simulated saline water by immersion test under high temperature,high pressure and CO_(2)-containing medium.Moreover,electrochemical impedance spectroscopy(EIS)was utilized to evaluate the impedance change of coating in corrosive medium before and after immersion.Results showed that the thermal decomposition temperature of urushiol titanium coating achieved at 275.19℃.After immersed in simulated saline solution at 140℃and 155℃with CO_(2) pressure of 2 MPa for 30 d,the low-frequency impedance values of the coating could reach the respective magnitude of 10^(11)Ω·cm^(2) and 10^(10)Ω·cm^(2).Moreover,the valence bond characteristics of the coating did not change,and the surface morphology of coating was uniform and closely combined with the substrate,which indicated that the coating showed excellent protective performance against high temperature.

关 键 词：漆酚 有机钛 耐温涂层 防护性能 

分 类 号：TG174.44[金属学及工艺—金属表面处理]