【摘要】 利用超声电沉积的方法,在低碳钢基体表面制得Ni-TiN涂层。用原子力显微镜、高分辨率透射电子显微镜、X射线衍射仪及扫描电镜对Ni-TiN涂层的微观形貌、组成及耐腐蚀特性进行研究。结果表明,超声波功率的增加,可使Ni-TiN涂层中的晶粒得到细化。Ni-TiN涂层的TiN粒子均匀镶嵌于镍晶粒中,基质镍晶粒得到细化,其Ni晶粒和TiN颗粒均为纳米数量级,其平均粒径分别约为80和30 nm。腐蚀试验表明,Ni-TiN纳米涂层的腐蚀速率很小,其平均腐蚀速率为1.9×10-5kg/(m2·h),其表面更加平整,腐蚀孔较少。更多还原

【Abstract】 Ni-TiN coatings were successfully prepared by ultrasonic electrodeposition on the surface of mild steel.The coating microstructure,composition and corrosion behavior were investigated by atomic force microscopy,high-resolution transmission electron microscopy,X-ray diffraction,and scanning electron microscope.The results indicate that the grains of Ni-TiN coating were refined with the increase of ultrasonic power.TiN particles are uniformly distributed in NiTiN nanocoating,and matrix grain was refined.the average diameter of Ni grains and TiN particles are respectively 80 and 30 nm,respectively.In corrosion tests,the corrosion rate of Ni-TiN nanocoating was very small,and it was about 1.9×10-5kg /(m2·h),and the surface was smoother,there were a few corrosion holes in the coating.更多还原