超疏水Ni-P-Al2O3纳米复合镀层的制备及耐腐蚀性能研究  

Preparation and Corrosion Resistance Research of Superhydrophobic Ni-P-Al2O3 Nanocomposite Coatings

作　　者：张银 康敏[1,2] 李恒征 刘运通 王兴盛[1,2] 刘泽祥[3] ZHANG Yin;KANG Min;LI Hengzheng;LIU Yuntong;WANG Xingsheng;LIU Zexiang(College of Engineering,Nanjing Agricultural University,Nanjing 210031,China;Key Laboratory of Intelligence Agricultural Equipment of Jiangsu Province,Nanjing Agricultural University,Nanjing 210031,China;Taizhou Polytechnic College,Taizhou 225300,China)

机构地区：[1]南京农业大学工学院,江苏南京210031 [2]南京农业大学,江苏省智能化农业装备重点试验室,江苏南京210031 [3]泰州职业技术学院,江苏泰州225300

出　　处：《电加工与模具》2020年第2期43-48,共6页Electromachining & Mould

基　　金：江苏省研究生科研与实践创新计划项目(KYCX19_0607)。

摘　　要：为提高45钢基体材料的耐腐蚀性能,采用电化学法与氟硅烷修饰相结合的方式在45钢基体表面制备超疏水Ni-P-Al2O3纳米复合镀层,并对镀层的表面形貌、晶相结构、表面粗糙度、润湿性及耐蚀性能进行了研究。结果表明:采用电沉积法制备的Ni-P-Al2O3镀层表面均匀、致密,且无明显气孔缺陷,接触角测试表明其表面达到了超疏水状态,而经电化学加工后,镀层表面形成不规则的微凹坑结构,表面粗糙度值明显增大。经电化学测试,与普通Ni-P-Al2O3镀层相比,超疏水Ni-P-Al2O3镀层的腐蚀电流密度、腐蚀速率均更小,表现出优异的耐腐蚀性能。A superhydrophobic Ni-P-Al2O3 nanocomposite coating was prepared on the 45 steel substrates by electrochemical machining and fluorosilane modification in order to enhance the corrosion resistance of 45 steel substrates.The surface morphology,crystalline structure,surface roughness,wettability and corrosion resistance of the samples were investigated.The results showed that the Ni-P-Al2O3 nanocomposite coatings were dense,homogeneous and no obvious pores with electrodeposition preparation,and the contact angle test showed that the surface reached superhydrophobic status.An irregular micropit structure was obtained after the Ni-P-Al2O3 composite coatings were prepared by electrochemical machining,and an increase was in the surface roughness of the samples.In addition,the electrochemical test indicated that the superhydrophobic surface exhibited a lower corrosion rate and current density compared with the normal samples,which showed a better corrosion resistance.

关 键 词：纳米复合镀层 氟硅烷修饰 表面粗糙度 耐蚀性 

分 类 号：TG662[金属学及工艺—金属切削加工及机床]