Urban outdoor metal furniture relies on robust electroplated coatings (e.g., zinc, chromium) for weather and corrosion resistance. Key adhesion test standards include:
1. ASTM B571 (Standard Test Methods for Adhesion of Metallic Coatings): Uses bend, heat-quench, impact, or chisel tests to evaluate coating detachment.
2. ISO 2819 (Metallic coatings on metallic substrates): Specifies grid-cut (cross-hatch) and peel tests for qualitative adhesion assessment.
3. EN ISO 2409 (Paints/varnishes – Cross-cut test): Adaptable for electroplated layers; a grid is scored and tape-applied to check removal.
4. ASTM D3359 (Measuring adhesion by tape test): Similar to ISO 2409, often applied to coated furniture surfaces.
These methods ensure coatings withstand mechanical stress, environmental exposure, and longevity demands in urban settings. Regular testing prevents peeling, blistering, or corrosion, maintaining aesthetic and functional integrity.