The ISO 2 2553-15: 2022 standard specifies an assay method for testing how electrodeposition coatings are affected by ejected liquids during curing. This section focuses primarily on discoloration or changes in the coating surface due to permeation residues during electrodeposition coating curing and rinsing. This test method is suitable for electrodeposition coatings in automotive and general industrial applications such as chillers, consumer products, radiators, aerospace equipment and agricultural equipment. The standard ensures quality control and performance evaluation of electrodeposition coatings through standardized testing procedures to ensure the Stability and durability of coatings in practical applications.