Title of article :
Preparation of alumina coatings on metallic nickel substrate using a room-temperature wet chemical pretreatment method
Author/Authors :
Yuwang Han، نويسنده , , Dongsheng Xu، نويسنده , , Cuiyun Lu، نويسنده , , Ning Li، نويسنده , , Jian Zhou، نويسنده , , Yi Hu، نويسنده , , He Huang، نويسنده ,
Issue Information :
دوهفته نامه با شماره پیاپی سال 2011
Abstract :
Electrodeposited nickel substrate was effectively micro-roughened with an acidic bath containing 5 wt% H2SO4 and 10 wt% (NH4)2S2O8 at room temperature. The uniformly roughened surface was then sequentially wash-coated with boehmite sol and alumina slurries. The microstructure and the surface performance of the wash-coat/substrate were investigated by scanning electron microscopy and ultrasonic vibration test. The nickel substrate that was etched for 3 min at room temperature yielded a foam-like roughened surface morphology with a high large surface area. A crack-free primer coating and a slurry coating with very little tiny crack can be prepared by using this convenient, energy-saving, and time-efficient pretreatment method.
Keywords :
Metal , Surface , Etching , Adhesion
Journal title :
Materials Chemistry and Physics
Journal title :
Materials Chemistry and Physics