Abstract: A method for forming a coating on an electrically conductive surface is disclosed. The method comprises the steps of immersing the surface in a bath comprising an electrodepositable mixture of an intrinsically insulative polymer and an organic acid salt of an intrinsically conductive polymer, applying a voltage between an electrode and the surface in the bath to deposit a polymeric coating of the mixture on the surface, and curing the polymeric coating. The polymeric coating can be made electrically conductive by the additional step of immersing the polymeric coating in an organic acid after the deposition and before curing. A multilayered coating can be provided after curing the electrically conductive polymeric coating, by depositing a second or subsequent coating of an electrodepositable organic resin from an aqueous bath containing the resin on application of a voltage between an electrode and the electrically conductive polymeric subcoating in the bath.

Abstract: A process of diaphragmless electrolysis comprises providing an electrochemical cell having substantially parallel electrodes in the form of discs axially spaced from each other and connected for common rotation about their axis, one of the discs having means defining a central opening, causing common rotation of the electrodes, introducing matter to be electrolyzed through said central opening, adjusting the speed of rotation until the profile of velocity of effective radial flow between the discs shows a double-humped distribution, and applying a potential between the discs.