Anodic electrodeposition of asphalt-polystyrene emulsions on galvanized steel

Anodic electrodeposition of a commercial asphaltic emulsion modified with p olystyrene emulsion and oleate of potassium was studied. The process was ca rried out at a constant voltage in a continuously agitated bath, employing galvanized steel electrodes maintained at a fixed distance of separation. C omposition and operating conditions were determined to obtain uniform textu re and compact films with a thickness usable by industry. It was found that the system obeyed Ohm's and Faraday's laws and presented film-dissolution behavior. In addition, a kinetic study was performed in which a mathematica l model was proposed to predict film growth with time. (C) 1999 John Wiley & Sons, Inc.