화학공학소재연구정보센터
Journal of the Electrochemical Society, Vol.146, No.2, 537-546, 1999
Local deposition of Ni-P alloy on aluminum by laser irradiation and electroless plating
A new technique on local modification of aluminum was attempted by combining anodization, laser irradiation, and electroless plating. Aluminum specimens covered with a porous anodic oxide film were immersed in Ni2+/H2PO2- solution containing Pb2+ ions at C-Pb(2+) = 0-2.4 ppm and irradiated 293 K with a pulsed yttrium aluminum garnet (YAG) laser through a lens and quartz window to remove the oxide film locally. The specimen was then transferred into the Ni2+/H2PO2- solution at 358-368 K to deposit Ni-P alloys on the aluminum by electroless plating. Local deposition of amorphous Ni-P alloys (9.5-11.2 atom % P) at the laser-irradiated area was obtained at C-Pb(2+) = 0.3-2.4 ppm above 358 K. The effects of C-Pb(2+) on the rate of Ni-P electroless deposition as well as on the morphology and crystal structure of Ni-P deposits were also investigated. It was found that the addition of Pb2+ ions to the solution leads to the deposition of Ni-P alloys with a smooth surface and that it slightly affects the composition and crystal structure of the deposits.