Overcoming Performance Challenges with Waterborne DTM Coatings
Direct to metal (DTM) coatings provide advantages over multilayer systems by reducing the number of application steps, lowering raw material costs and the need for active pigments. Waterborne resins used in anticorrosion coatings have improved dramatically in recent years and new development is continuing to improve resin performance at reduced VOC. Because the corrosion protection provided by these coatings is highly dependent on both the resin and the formulation of the coating, choosing the appropriate solvents, additives and pigments is necessary to optimize the performance of the coating. Often attempting to drop-in or directly replace resins in waterborne formulations does not result in optimum performance. Therefore, the formulation of these waterborne DTM coatings presents many challenges to the coatings formulator.