丁炔二醇乙氧基化合物对镍锰镀层的影响  

Effect of butynediol ethoxylate on Ni-Mn coating

作　　者：韦秀洁 陈宇湘 杨雪嘉 潘秉锁[1] Wei Xiujie;Chen Yuxiang;Yang Xuejia;Pan Bingsuo(College of Engineering,China University of Geosciences,Wuhan 430074,China)

机构地区：[1]中国地质大学(武汉)工程学院,湖北武汉430074

出　　处：《电镀与精饰》2024年第6期42-47,共6页Plating & Finishing

基　　金：国家重点研发项目(2022YFB3706604)。

摘　　要：为了获得平整的镍锰合金镀层,在瓦特型镀液中研究了糖精存在下丁炔二醇乙氧基化合物(BEO)对Ni-Mn镀层性能的影响规律。通过线性扫描伏安法探究了BEO对阴极极化的影响,并对电沉积Ni-Mn镀层的表面形貌、晶体结构和显微硬度进行了表征,讨论了Ni-Mn镀层结构和性能变化的可能机制。结果表明:BEO的加入使阴极极化电位向更负的方向偏移,显著抑制金属离子的阴极还原反应,细化了晶粒,有助于获得平整、高显微硬度的镀层。对比经300℃退火后Ni-Mn镀层的硬度和结构发现,从含BEO镀液中获得的镀层的晶粒粗化趋势较小,退火硬化更为明显。In order to obtain a smooth Ni-Mn coating,the effect of butynediol ethoxylate(BEO)on the performance of Ni-Mn coating was studied in a Watts-type plating solution with saccharin.The effect of BEO on cathodic polarization was investigated through linear scanning voltammetry,and the surface morphology,crystal structure and microhardness of the electrodeposited Ni-Mn coatings were characterized.The possible mechanisms of structure and performance changes of the electrodeposited Ni-Mn coatings were discussed.The results indicated that the addition of BEO shifted the cathodic polarization potential towards a more negative direction,significantly inhibited the cathodic reduction reaction of metal ions,which refined the grain size and favored the formation of a smooth and high microhardness coating.Comparing with the structure and microhardness of Ni-Mn coatings that annealed at 300℃,it was found that the grain coarsening trend of the coating obtained from the bath containing BEO was smaller,and the annealing hardening was more obvious.

关 键 词：镍锰镀层 丁炔二醇乙氧基化合物 直流电镀 退火硬化 

分 类 号：TQ153.2[化学工程—电化学工业]