Suggestions on the selection of coating pretreatment agent

■ the selection of chemicals meeting the quality requirements Different parts have different requirements on the coating quality Generally, they are selected according to the appropriate principles, and adhere to the unity of treatment quality and economy ■ suitable pre-treatment agents shall be selected for the chemicals steel parts, galvanized parts, steel aluminum mixed parts, forging castings, aluminum parts, etc conforming to the workpiece materials ■ selecting the medicament with suitable process can realize step-by-step as much as possible, but it can also be properly integrated due to the restrictions of conditions, such as two in one degreasing with table adjustment, two in one degreasing and rust removal, etc., and the special degreasing agent for spraying and phosphating solution with low phosphating sediment shall be selected for spraying ■ the unit price of reagents with low unit area cost is important, but the unit area cost of actual operation is more important, because the latter directly affects the treatment cost ■ for chemicals with good compatibility with coating, such as plastic spraying, film type phosphating shall be selected, and manganese containing phosphating shall be selected for cathodic electrophoresis ■ suppliers with strong after-sales service ability generally choose suppliers with strong economic strength and supply ability, who have passed ISO9000 quality system certification, similar experience and ability, complete after-sales service management system, stable after-sales service personnel and high education level.