Fractal growth and oscillations during electrochemical deposition in Pb-Znbinary system

Experimental studies of electrochemical deposition of pb, Zn and binary sys tem containing ph and Zn with two parallel electrodes and a circular anode- point cathode are reported. Growth kinetics data for different electrode sy stems are compared. The data obey the simple empirical equation d=ct(m) for point cathode and circular anode where d is the radius of the circular env elope grown in time t and m and log c are slope and intercept respectively. Scanned pictures of electrodeposits have been characterised in terms of fr actal dimension by box counting method. Cathode potential changes with time have been monitored during the process of electrodeposition and dissolutio n. Fluctuations in conductance are also observed at the surface of cathode during the process of electrodeposition. Next amplitude plots (A(t) vs A(t10)) indicate that oscillations are periodic in the binary system while for pure pb and Zn it is like random noise.