Journal of Adhesion Science and Technology, Vol.27, No.2, 136-142, 2013
Preparation and adhesion performance of multilayered Ni coatings deposited by ultrasonic-assisted electroplating
The multilayered Ni coatings were successfully obtained by introducing the periodic ultrasonic wave into the ordinary electroplating process. The bidirectional bend method is proposed to assess the adhesion performance of electroplated Ni coatings to the substrate. The results show that the multilayered Ni coatings show much better adhesion performance than that of the ordinary Ni coatings. The application of ultrasonic causes a strong modification in the growth orientation of Ni crystallites in the coating, to promote the growth of nickel layers in the manner parallel to the substrate surface, namely (111) growth orientation.
Keywords:multilayered Ni coatings;adhesion performance;bidirectional bend test;periodic ultrasonic wave