In the field of powder coating, pretreatment is a complex process. Coating failures related to inadequate pretreatment rarely have a single, obvious cause. Instead, several small deviations from the chemical supplier’s recommendations for controlling chemical solution quality and/or from the equipment supplier’s recommendations for maintaining the equipment cause failures. For the best process results, powder-coating users should emphasize: how to control the process; selection and use of the right chemicals; and design and maintenance of the equipment.
By Gary Conner
By George N Bullen FSME