Kinetic surface roughening of electrodeposited amorphous PdNiP films has been investigated by atomic force microscopy combined with electrochemical techniques. Interface width w(l,t) of the films obeys anomalous scaling ansatz w(l,t)approximate to l(H)t(loc)(beta)f(t/l(z)), with H=0.60 +/- 0.06, beta(loc)=0.47 +/-0.03, and beta=0.19 +/- 0.03. These results suggest that kinetic roughening of PdNiP films could be controlled by two factors, large overpotential and diffusion instability. (C) 2008 The Electrochemical Society. [DOI: 10.1149/1.2981040] All rights reserved.