Method for detecting grease pollution in automobile coating

The invention relates to the technical field of coating detection. The method for detecting the grease pollution in the automobile coating comprises the following steps: step (1), providing a substrate, and enabling the substrate to be in a semi-closed state; (2) smearing a to-be-detected lubricating grease sample on the substrate; (3) arranging an electrophoresis test piece above the substrate in the step (2) to form a semi-closed space; (4) putting the substrate in the step (3) and the electrophoresis test piece into an oven for baking; (5) after cooling, coating a coating on the surface of the electrophoresis test piece polluted by the lubricating grease, baking again, and cooling to be tested; and (6) detecting a paint film of the electrophoresis test piece obtained in the step (5). The detection method provided by the invention can effectively detect the stability of the lubricating grease and the compatibility of the lubricating grease and the upper coating in the automobile coating, thereby judging whe