Chemical stripping solutions for removing powder coating
Chemical stripping solutions is an common and efficent way for removing powder coating and e-coatng.
Benefits. A chemical stripping process can be done in-plant at considerably less expense than the burn-off and the abrasive-media blasting methods, which require higher equipment, energy, and media costs than chemical stripping requires. Chemical stripping operates at moderate temperatures, usually 150°F to 200°F, which keeps energy costs down. Chemical stripping also leaves the original surface of the racks intact and very clean after a freshwater rinse.
Chemically stripping e-coating from parts is also easy and quick because of the low film build created during the first pass through the e-coat tank. First-pass film build is usually about 1 mil. As a result, strip time is normally 20 to 30 minutes. In less than an hour, the racks are ready to be returned to the coating line.
E-coated and powder-coated rework parts can also be recycled and restored to their original surface quality, and reprocessed through the coating lines in less than an hour. Powder coatings racks can also be chemically stripped, as long as the racks have fewer than 10 mils of powder buildup and are cleaned daily.
Concerns. Common questions concerning chemical stripping for racks and coating rework involve the proper training and knowledge associated with environmental and operator handling. The latest chemical stripping solutions are more environmentally and operator friendly than those in the past. Powder coating and e- coating sludge must be removed regularly, either by filtration equipment or by decanting on an as-required basis. The cost of chemical replenishment must be absorbed by the end user.