摘要
为提高Ni-Mo合金镀层的电化学性能,在Ni-Mo镀液中添加纳米ZrO2颗粒成功制备了Ni-Mo/ZrO2复合镀层,研究了Ni-Mo/ZrO2合金电镀层的结构及其化学活性,并与Ni-Mo、Ni/ZrO2的相关性能进行了对比.研究结果表明:Ni-Mo/ZrO2镀层结构为非晶+纳米晶并混杂有ZrO2纳米颗粒,添加ZrO2纳米颗粒对镀层表面的形貌有一定影响;在电流密度低于250 mA/cm2时,Ni-Mo/ZrO2复合镀层具有比Ni-Mo、Ni/ZrO2合金镀层更优异的析氢催化活性,其耐腐蚀性能优于其他两种镀层;高耐蚀性与Ni-Mo非晶纳米晶基体有关,Mo元素易被氧化形成氧化膜,提高了复合镀层表面的结构稳定性,而复合的ZrO2纳米颗粒本身为陶瓷颗粒也具有高的耐蚀性.
To improve the electrochemical properties of Ni-Mo alloys,the Ni-Mo/ZrO2 co-coating is obtained by adding nano ZrO2 particles into Ni-Mo plating solutions.The microstructure and chemical activity of Ni-Mo/ZrO2 alloy electrode are discussed and compared with that of Ni-Mo and Ni/ZrO2 electrodes.The experimental results show that the Ni-Mo/ZrO2 plating microstructure is composed of amorphous and nanocrystal phases,mixed with nano-ZrO2 particles which can affect the morphology of the plating surface.When the electrolysis current is lower than 250 mA/cm2,the Ni-Mo/ZrO2 co-coating has a better hydrogen evolution catalytic activity than Ni-Mo and Ni/ZrO2 alloy electrodes,and its anti-corrosive performance is more outstanding than that of the latter two electrodes which is related to the Ni-Mo amorphous basement.The element Mo,which can be easily oxidated and formed to oxide,increases the structure stability of the compound plating surface.In addition,the nano-ZrO2 particle also has an outstanding anti-corrosive properties in itself.
出处
《材料科学与工艺》
EI
CAS
CSCD
北大核心
2011年第1期104-109,共6页
Materials Science and Technology
