不锈钢表面防护TiC/a-C∶H纳米复合薄膜的耐腐蚀性能  

Corrosion Resistance of Nanocomposite TiC/a-C∶H Film Deposited on Stainless Steel

作　　者：周升国[1] 刘龙[1] 王跃臣[1] 刘正兵[1] 马利秋[1] 

机构地区：[1]江西理工大学材料科学与工程学院,赣州341000

出　　处：《材料导报（纳米与新材料专辑）》2016年第1期73-75,94,共4页

基　　金：国家自然科学基金(51302116;51365016);中科学院兰化所国家重点实验室开放基金(LSL-1203)

摘　　要：采用直流反应磁控溅射技术在304不锈钢表面沉积TiC/a-C∶H纳米复合薄膜,并研究了TiC/a-C∶H纳米复合薄膜对不锈钢耐腐蚀性能的影响。通过扫描电子显微镜(SEM)和原子力显微镜(AFM)观察,结果表明薄膜表面光滑且薄膜结构均匀致密。Raman光谱和XRD测试结果表明,薄膜具有纳米晶TiC镶嵌非晶碳基质的典型纳米复合微结构。通过测量薄膜的静态接触角分析薄膜的润湿性,不锈钢表面沉积TiC/a-C∶H纳米复合薄膜后疏水性能明显提高,水接触角高达98°。电化学腐蚀测试结果表明,不锈钢表面沉积TiC/a-C∶H纳米复合薄膜体系在质量分数为3.5%的NaCl溶液中自腐蚀电位约为-0.09V,腐蚀电流密度为2.43×10-8 A·cm-2,与无薄膜防护的裸露不锈钢相比,其耐腐蚀性能得到明显改善。Nanocomposite TiC/a-C∶H film was synthesized on 304 stainless steel by DC reactive magnetron sputtering technology.The influence of TiC/a-C∶H film on the corrosion resistance of stainless steel has been studied.The observation of scanning electron microscopy（SEM）and atomic force microscopy（AFM）photographs show that TiC/a-C∶H film is continuous,smooth and compact.The structure of the film determined by Raman and XRD presents nanocrystallites/amorphous microstructure which has TiC nano-particles in the amorphous carbon matrix.The wettability of the film and 304 stainless steel were examined by the contact angle measurement.The results show that the hydrophobicity of 304 stainless steel coated TiC/a-C∶H film is obviously improved,whose water-contact angle increases to 98°from 77°.The results of electrochemical corrosion tests indicate that TiC/a-C∶H film prepared by the DC reactive magnetron sputtering technology has better corrosion-resistance performance compared to 304 stainless steel.The free corrosion potential in 3.5wt% NaCl solution is-0.09 Vand the corrosion current density is 2.43×10-8 A·cm-2.The corrosion performance is prior to that of the sample uncoated TiC/a-C∶H film.

关 键 词：磁控溅射 TiC/a-C∶H 疏水性 耐腐蚀性 

分 类 号：TH117.3[机械工程—机械设计及理论]