摘要
为了探讨1,4-丁炔二醇对纳米晶镍镀层硬度和耐蚀性的影响,采用直流电沉积法在黄铜表面制备了纳米晶镍镀层。利用X7000 X射线衍射仪、FEI Quanta600 FE-SEM扫描电镜、DUH-211S动态超显微微米压痕仪、动电位极化曲线及阻抗谱,研究了不同浓度1,4-丁炔二醇对镍镀层结构、硬度及耐蚀性的影响规律。结果表明:随着镀液中1,4-丁炔二醇浓度的增加,镍镀层晶面的择优取向由(200)织构向(111)转变,晶粒尺寸减小;镍镀层硬度增加,在1,4丁炔二醇浓度为0.5 g/L时达到654 HV;在3.5%Na Cl(质量分数)溶液中当1,4-丁炔二醇浓度为0.1 g/L时,镍镀层的耐腐蚀性最好。
Nanocrystalline nickel coating was prepared on brass substrate by direct current electrodeposition.The phase composition and morphology of as-deposited Ni coating were analyzed by X-ray diffraction and scanning electron microscopy,and its hardness was measured with an ultramicroscopic micro indentation apparatus.Besides,an electrochemical test rig was performed to measure the polarization curves and electrochemical impedance spectra of asdeposited Ni coating;and the influence of 1,4-butynediol on the microstructure,hardness and corrosion resistance of nickel coating was investigated.Results showed that the preferred orientation of(200) texture of the Ni coating gradually transformed to(111)texture with increasing concentration of the 1,4-butynediol additive,while the grain size declined and the hardness rose therewith.Particularly,the Ni coating obtained at an additive concentration of 0.5 g/L exhibited the maximum hardness of 654 HV,and the one obtained at an additive concentration of 0.1 g/L in3.5%NaCl solution(mass fraction) exhibited the best corrosion resistance.
出处
《材料保护》
CAS
CSCD
北大核心
2015年第2期5-7,18,共4页
Materials Protection
基金
辽宁省自然科学基金项目(201202127)
辽宁省高等学校杰出青年学者成长计划(LJQ2011033)资助
关键词
直流电沉积
纳米晶镍
1
4-丁炔二醇
镀层结构
硬度
耐蚀性
direct current electrodeposition
nanocrystalline nickel coating
1,4-butynediol
microstructure
hardness
corrosion resistance
