摘要
在由FeSO_(4)·7H_(2)O 30 g/L、Co SO_(4)·7H_(2)O 30 g/L、H_(3)BO_(3)30 g/L和抗坏血酸1 g/L组成的Co-Fe合金镀液中添加10 g/L自制纳米ZrO_(2)溶胶,电沉积得到Co-Fe-ZrO_(2)复合镀层。研究了电流密度对Co-Fe-ZrO_(2)复合镀层微观结构、厚度、显微硬度和耐蚀性的影响。结果表明,随电流密度从5 mA/cm^(2)增大到30 mA/cm^(2),Co-Fe-ZrO_(2)复合镀层的晶粒细化,ZrO_(2)颗粒复合量、厚度和显微硬度均增大,耐蚀性先改善后变差。当电流密度为25 mA/cm^(2)时,Co-Fe-ZrO_(2)复合镀层的厚度为18.6μm,显微硬度为349 HV,表面平整致密,耐蚀性最佳。
A Co-Fe-ZrO_(2) composite coating was obtained by electroplating from a bath consisting of FeSO_(4)·7H_(2)O 30 g/L,CoSO_(4)·7H_(2)O 30 g/L,H_(3)BO_(3)30 g/L,ascorbic acid 1 g/L,and home-made nano-ZrO_(2) sol 10 g/L.The effect of current density on the microstructure,thickness,microhardness,and corrosion resistance of Co-Fe-ZrO_(2) composite coating was studied.The results showed that the crystal grains of Co-Fe-ZrO_(2) composite coating became finer,and the ZrO_(2) content,thickness,and microhardness of the composite coating were increased with the increasing of current density from 5 mA/cm^(2) to 30 mA/cm^(2),while the corrosion resistance of the composite coating was improved initially and then deteriorated.The Co-Fe-ZrO_(2) composite coating electrodeposited at 25 mA/cm^(2) was 18.6μm-thick,smooth,and compact with a microhardness of 349 HV and optimal corrosion resistance.
作者
张璐
余云丹
卫国英
ZHANG Lu;YU Yundan;WEI Guoying(School of Materials and Chemistry,China Jiliang University,Hangzhou 310018,China)
出处
《电镀与涂饰》
CAS
北大核心
2023年第9期1-6,共6页
Electroplating & Finishing
关键词
电沉积
钴-铁-二氧化锆复合镀层
电流密度
微观结构
厚度
显微硬度
耐蚀性
electrodeposition
cobalt-iron-zirconia composite coating
current density
microstructure
thickness
microhardness
corrosion resistance
