COATING METHOD BY ELECTRODEPOSITION

PURPOSE:To form a film of a uniform thickness required to prevent corrosion on the inside of the bag-structured part of an electrically conductive body to be coated by heating the bag-structured part and immersing the body in an electrodeposition paint bath. CONSTITUTION:When an electrically conductive body having a bag-structured part is immersed in an electrodeposition paint bath and coated by electrodeposition, the bag-structured part is heated so that the temp. of paint in the part is made higher than that of paint at the outside to the part. The specific electrical conductivity of the paint in the part is increased and the electrodeposition of the paint on the inside of the part is facilitated.