Cleaning before sand blowing and spraying - chemical alkali cleaning and degreasing

       Electrochemical degreasing, also known as electrolytic degreasing, its basic principle: in alkaline electrolyte, the workpiece is used as the cathode or anode, and the iron plate or nickel-plated plate is used as the anode or cathode. The surface of the workpiece is electrolytically separated, and the precipitated hydrogen or oxygen bubbles have strong mechanical tearing and impact on the oil stain on the surface of the workpiece, which promotes the oil stain to separate from the surface of the workpiece; at the same time, the hydrogen or oxygen also stirs the solution near the surface of the workpiece, which promotes the continuous flow of the solution. The ground cycle is renewed, which accelerates the saponification and emulsification of the alkaline electrolytic solution on the surface of the workpiece, so that the oil pollution on the surface of the workpiece can be removed and cleaned. Depending on the polarity of the parts, electrochemical degreasing is divided into cathodic degreasing and anode degreasing. The effect of electrochemical removal is better than that of chemical oil removal, and the oil removal is thorough and the effect is good.