Pre-treatment technology of color-coated plate with high adhesive force

The invention discloses a pre-treatment technology of color-coated plate with high adhesive force. The technology includes the cleaning process, the chemical treatment process and the baking and cooling process, wherein primary alkali washing, secondary alkali washing, primary hot water rinsing, primary composite oxidation, secondary composite oxidation, secondary hot water rinsing and third-timehot water rinsing are adopted. The technology is suitable for current large-scale colored coating production lines, and the T-bending property and aging T-bending property of products produced throughthe technology are superior to those of a common pretreatment technology. The color-coated plate produced through the pretreatment technology has excellent adhesive force performance, and the T-bending property and aging T-bending property of the products are higher than those of the traditional pretreatment technology and can be improved by 1-2 levels. The erichsen value is obviously improved, the scratch resistance is r