Corrosion resistance of painted parts depends on many factors: substrate, pretreatment, water quality, paint quality, polymerization and line setup & layout. Improving the performance of short (3 – 4 stage) metal pretreatment lines typically requires significant plant investment.
To avoid those investment costs Henkel has developed BONDERITE® E-AP APNR (Adhesion Promoter No Rinse), offering a unique combination of equipment and chemistry. The system is based on a misting device that applies a solution (the adhesion promoter) to substrates, without any requirements for rinsing. It improves the capabilities of the line by depositing the solution on parts at the end of the pretreatment process, increasing the corrosion resistance significantly: improvement up to 3-4 times (compared to Iron Phosphate). For galvanized material an even more impressive improvement can be achieved.