3M™ Surface Pre-Treatment AC-131 is a high-performance, non-chromated, conversion coating for applications on aluminum, nickel, and titanium alloys. The 3M™ AC-131 Pre-Treatment application is used for parts subsequently finished with epoxy-based and polyurethane-based organic coatings.

3M™ AC-131 Pre-Treatment provides an excellent solvent-free alternative to achieve the high performance required in aircraft paint applications. The current surface preparation technique such as Alodine® provides acceptable surfaces for coating applications. However, the alodine® process produces significant amounts of hazardous waste.