摘要
The initial nickel deposition for the direct electro le ss nickel plating on non-catalytically active magnesium alloy is critical.The s urface morphology and composition of the initial nickel plating coating are obta ined by means of the scanning electron microscopy (SEM) and the energy dispersiv e X-ray (EDS).In addition, the mass gain/loss in the initial nickel deposition process was measured by using the electro-balance.The results showed that the M gO coating was gradually corroded by the plating solution, at the same time, MgF 2 produced by F-,H+ and MgO was deposited on the substrate during the init ial electroless plating process.The nickel of the initial electroless plating wa s mostly growing on the boundary between the MgF 2 coating and the MgO coating of the activation substrate, and then came to two sides.After that, the Ni-P co ating growth rate to cover with the MgF 2 coating was prior to the MgO coating. The electroless plating was in company with the substrate corrosion,but the elec troless plating rate catalyzed by the exchanged nickel was more than the substra te corrosion rate.
The initial nickel deposition for the direct electroless nickel plating on non-catalytically active magnesium alloy is critical. The surface morphology and composition of the initial nickel plating coating are obtained by means of the scanning electron microscopy (SEM) and the energy dispersive X-ray (EDS). In addition, the mass gain/loss in the initial nickel deposition process was measured by using the electro-balance. The results showed that the MgO coating was gradually corroded by the plating solution, at the same time, MgF2 produced by F-, H+ and MgO was deposited on the substrate during the initial electroless plating process. The nickel of the initial electroless plating was mostly growing on the boundary between the MgF2 coating and the MgO coating of the activation substrate, and then came to two sides. After that, the Ni-P coating growth rate to cover with the MgF2 coating was prior to the MgO coating. The electroless plating was in company with the substrate corrosion, but the electroless plating rate catalyzed by the exchanged nickel was more than the substrate corrosion rate.
出处
《化工学报》
EI
CAS
CSCD
北大核心
2005年第2期301-305,共5页
CIESC Journal
基金
辽宁省自然科学基金项目 (2040189).~~
关键词
镁合金
化学镀
生长过程
腐蚀
Coatings
Corrosion resistance
Deposition
Energy dispersive spectroscopy
Magnesium alloys
Morphology
Nickel plating
Scanning electron microscopy
