Environmental management for baked enamel coating system onto aluminum alloy building materials

Part2 Interim report on pretest for surface treatments before coating

Abstract

In part1 of this report, the research background and outline of pretest for surface treatments are described. In this paper, it is included that interim report on pretest for surface treatments. Evaluation method is five tests which are adhesion test (cross-cut test), weight-dropping test, scratch hardness (pencil method), resistance of boiling water immersion, resistance of heat and cold round. Intial adhesion in almost kinds of surface treatments is enough. It is confirmed that adhesion after boiling water immersion and heat and cold round differs with kind of chemical conversion, kind of substrate and coating specification. Accelerated deterioration tests and exposure weathering test have been continued. Based on these results, environmental management for baked enamael coating system would be proposed in the future.