直接浸泡法构筑带锈青铜的超疏水表面  

Preparation of Super Hydrophobic Surface Film for Rust Bronze by Direct Immersion Method

作　　者：史笔函 闫莹[1] 周浩[2] 吴来明[2] 吴雪威 朱以亮 蔡兰坤[1] SHI Bihan YAN Ying ZHOU Hao WU Laiming WU Xuewei ZHU Yiliang CAI Lankun(School of Resources and Environmental Engineering, East China University of Science and Technology, Shanghai 200237, China Key Scientific Research Base of Museum Environment, State Administration for Cultural Heritage, Shanghai Museum, Shanghai 200050, China)

机构地区：[1]华东理工大学资源与环境工程学院,上海200237 [2]上海博物馆馆藏文物保存环境国家文物局重点科研基地,上海200050

出　　处：《腐蚀科学与防护技术》2017年第5期540-546,共7页Corrosion Science and Protection Technology

基　　金：国家自然科学基金项目(51671117);上海市科委科研计划重点支撑项目(13231203000)~~

摘　　要：以正十二硫醇-十四酸两种混合溶液作为疏水剂,采用直接浸泡法在模拟带锈(混合锈与粉状锈)青铜表面构筑超疏水薄膜,以达到对青铜文物的防腐保护。通过扫描电子显微镜、接触角测量仪对超疏水表面形貌特征及疏水性进行分析,采用傅里叶红外光谱仪对超疏水表面进行成分分析,并采用电化学工作站对其进行耐腐蚀性分析。结果表明,经超疏水处理后,带锈青铜表面形成紧凑的片状结构,其厚度约为0.1μm。接触角分别可达157.32o和151.76o。带混合锈青铜的自腐蚀电流密度由8.5 m A·cm^(-2)降低至0.30 m A·cm^(-2),缓蚀效率达96.54%;带粉状锈青铜的自腐蚀电流密度由5.91 m A·cm^(-2)降低到2.89×10-2m A·cm^(-2),缓蚀效率达99.51%。In order to protect bronze relics from further corrosion, it is essential to apply a super hydrophobic film on its surface. Super hydrophobic film on the surface of the simulated rust bronze（with mixed rust and powdery rust） was prepared by direct immersion method with n-dodecyl mercaptan（CH3（CH2）（10）CH2SH） and myristic acid（C14H28O2） mixed solution as hydrophobic agent. The prepared super hydrophobic surface films were characterized by scanning electron microscope, contact angle measuring instrument and Fourier transform infrared spectroscopy. Then the corrosion resistance of the rust bronze with super hydrophobic surface films was assessed by electrochemical workstation. Experimental results show that a ca 0.1 μm compact super hydrophobic film was formed on the surface of the bronze with the above two type rusts, of which the contact angle can reach 157.32° and 151.76° respectively. For the bronze with mixed rust, its free-corrosion current density was reduced from 8.5 m A·cm-2to 2.94×10-1m A·cm-2due to the applying super hydrophobic surface film, and correspondingly the corrosion inhibition efficiency reached 96.54%. Similarly, for the bronze with powdery rust, the free-corrosion current density was reduced from 5.91 m A·cm-2to 2.89×10-2m A·cm-2, and the corrosion inhibition efficiency reached 99.51%.

关 键 词：超疏水薄膜 带锈青铜 浸泡法 正十二硫醇 十四酸 

分 类 号：TG174.41[金属学及工艺—金属表面处理]