PREDICTION OF ELECTRODEPOSITION RATES FROM AN IMPINGING JET

A mathematical model and numerical algorithm are developed to predict electrode-position rates from a 2-D jet of electrolyte that impinges o n a flat surface The principal situations of interest are for applied voltages that produce current densities below the limiting current. Th e motion is assumed to be at high speed with the jet inducing a thin l aminar boundary layer on the surface; a progressively thinner concentr ation layer and an electrochemical double layer near the surface ave a ccounted for. Two cases, corresponding to a submerged and unsubmerged jet, are considered. A boundary integral method is used to compute the current density along the plate in a general iterative numerical proc edure coupled to the solution of the hydrodynamic, concentration and e lectrochemical boundary layers. The results show that relatively high deposition rates occur near the point of impingement and that altering the jet angle relative to the surface influences local electrodeposit ion rates significantly.