蒸发器用铝管表面有机-无机耐蚀杂化膜的制备与表征

通过浸渍法制备了有机-无机耐蚀杂化膜。通过正硅酸乙酯和乙烯基三乙氧基硅烷水解缩合与溶胶凝胶法,成功地在铝管表面沉积得到乙烯基三乙氧基-二氧化硅薄膜。最佳制备条件为:水解温度35℃,水解时间180min,固化温度120℃,固化时间90min。通过点滴、盐雾、碱浸失重和析氢试验,研究了膜层的耐蚀性。结果表明:CuSO4点滴时间延长约40倍;耐蚀性明显增强,相同情况下的失重速率减半;析氢时间也延长1倍。     

750 kV输电线路耐张塔刚性跳线的研究开发

西北750 kV输电线路有43基耐张转角塔。为了确定经济、安全可靠、施工方便的跳线连接方式,预选普通软跳线、笼式硬跳线及铝管式硬跳线3种方式进行经济技术比较。通过计算、试验和论证,推荐采用铝管式硬跳线,它加工简单、施工方便,可降低工程造价,完全满足线路工程使用要求。     

铝管表面混合硅烷稀土耐蚀复合膜的制备

采用浸渍法制备了混合硅烷和稀土铈复合膜。在铝管试样表面组装一层双-[3-（三乙氧基）硅丙基]四硫化物（BTESPT）和乙烯基三甲氧基硅烷（VS）的混合硅烷薄膜,然后在膜上沉积稀土铈转化膜,制得硅烷稀土复合膜。通过点滴、盐雾、亲水角和Tafel极化曲线实验研究了复合膜层的耐蚀性。结果表明：与空白试样相比,亲水角角度明显增大;复合膜层的自腐蚀电流密度降低了2个数量级,抗蚀能力提高了3倍,其耐蚀性能比铬酸盐转化膜的还要好。扫描电子显微镜（SEM）显示：其复合膜层均匀、致密;EDS分析表明：复合膜主要由S,O,Si,Al和Ce等元素组成,并初步探讨了成膜机理。     

纳米SiO2协同稀土铈对铝管表面硅烷膜的耐蚀性研究

首先在铝管表面组装一层双-[3-(三乙氧基)硅丙基]四硫化物(BTESPT)硅烷薄膜,然后将其浸入含有纳米SiO2的稀土铈转化液中沉积制得SiO2改性硅烷稀土复合膜.通过点滴、失重、盐雾实验和电化学手段对改性复合膜的耐蚀性进行考察.Tafel极化曲线测试结果表明其耐蚀性与空白试样相比,自腐蚀电流密度下降了3个数量级;盐雾实验结果也表明其抗蚀能力提高了3倍;SEM显示其复合膜层均匀、致密;EDS检测分析表明该膜层主要由S,O,Si,Al和Ce等元素组成;初步探讨了复合膜的耐蚀机理.     

铝管表面硅烷稀土复合膜的制备及性能研究

在60℃时采用浸渍法制备硅烷稀土复合膜,通过先在试样表面自组装一层γ-氨丙基三乙氧基(γ-APS)硅烷薄膜,再在膜上沉积稀土铈转化膜制得硅烷稀土复合膜。采用电化学、失重和盐雾实验对铝管表面硅烷稀土复合膜的耐蚀性进行考察。线性电位扫描、Tafel曲线和交流阻抗(EIS)的结果均表明其耐蚀性与空白样相比,极化电阻和自腐蚀电流均提高了两个数量级,阻抗阻值提高了2倍;盐雾实验结果也表明其抗蚀能力提高了3倍;SEM显示其复合膜层均匀致密,EDS检测分析表明复合膜主要由N,O,Si,Al和Ce等元素组成;初步探讨了复合膜的耐蚀机制。     

Study on corrosion resistance of the BTESPT silane cooperating with rare earth cerium on the surface of aluminum-tube

Bis-3-(triethoxysilyl)propyltetrasulfide(BTESPT) silane-rare earth cerium composite coatings on aluminum-tube were prepared at 60 °C by immersion method.The performance of composite coatings to protect the aluminum-tube against corrosion was investigated with potentiodynamic polarization curves,electrochemical impedance spectroscopy(EIS),and salt spray test(SST).The results of potentiodynamic polarization curves and EIS indicated that the self-corrosion current decreased by two orders of magnitude and the impedance values increased to 20 k?/cm2;the result of salt spray test showed that the anti-corrosion time increased by three times,which indicated that the corrosion resistant capability of the composite coatings was improved significantly.The scanning electron microscopy(SEM) photograph showed that the conversion coating was uniform and dense.The energy dispersive spectrometer(EDS) was used to analyse coating composition,which was mainly S,O,Si,Al and Ce.The formation and corrosion mechanism of the composite coating were also studied.