CAJ | 학술논문

采用由氧化锌12g/L、氢氧化钠94 g/L、2-氨基-3-羧基吡啶4.2 g/L、四乙烯五胺17g/L、三乙醇胺2g/L、专利表面活性剂0.5 g/L及碳三氧化二铬(粒径2μm)0～ 11 g/L组成的镀液,于温度50℃、pH 6.5和电流密度4A/dm2的条件下,在低碳钢上电镀Zn-Cr2O3复合镀层.其显微硬度采用维氏硬度计测量,耐磨性用Taber磨耗试验机测量,表面形貌和显微组织采用扫描电镜(SEM)、X射线衍射(XRD)及X射线光电子能谱(XPS)进行分析,在3,5％(质量分数)NaCl溶液中的耐蚀性以电化学阻抗谱(EIS)评价.证实了锌基体中存在团聚的Cr2O3颗粒.与纯锌镀层相比,Zn-Cr2O3复合镀层的机械性能及耐蚀性能更好.
채용유양화자12g/L、경양화납94 g/L、2-안기-3-최기필정4.2 g/L、사을희오알17g/L、삼을순알2g/L、전리표면활성제0.5 g/L급탄삼양화이락(립경2μm)0～ 11 g/L조성적도액,우온도50℃、pH 6.5화전류밀도4A/dm2적조건하,재저탄강상전도Zn-Cr2O3복합도층.기현미경도채용유씨경도계측량,내마성용Taber마모시험궤측량,표면형모화현미조직채용소묘전경(SEM)、X사선연사(XRD)급X사선광전자능보(XPS)진행분석,재3,5％(질량분수)NaCl용액중적내식성이전화학조항보(EIS)평개.증실료자기체중존재단취적Cr2O3과립.여순자도층상비,Zn-Cr2O3복합도층적궤계성능급내식성능경호.
Zn-Cr2O3 composite coatings were prepared on mild steel by electroplating from a cyanide-free bath containing ZnO 12 g/L,NaOH 94 g/L,2-amino-3-carboxypyridine 4.2 g/L,tetraethylenepentamine 17 g/L,triethanolamine 2 g/L,proprietary surfactant 0.5 g/L and Cr2O3particles (2 μm in diameter) 0-11 g/L at temperature 50 ℃,pH 6.5,and current density 4 A/dm2.The microhardness of the composite coatings was examined by Vickers tester,the wear resistance by Taber abrasion tester,the surface morphology and microstructure by scanning electron microscopy (SEM),X-ray diffraction (XRD),and X-ray photoelectron spectroscopy (XPS),and the corrosionresistance by electrochemical impedance spectroscopy (EIS)in 3.5wt％ NaCl solution.The existence of aggregated Cr2O3particles in zinc matrix was confirmed.The Zn-Cr2O3composite coatings exhibit superior mechanical properties and corrosion resistance to zinc coatings.