Overview
ISO 2819:2017 - "Metallic coatings on metallic substrates - Electrodeposited and chemically deposited coatings - Review of methods available for testing adhesion" provides a consolidated review of qualitative adhesion tests for metallic electroplated and chemically deposited coatings. The standard lists common, practical methods used to check whether a metallic coating is properly bonded to its metallic substrate. It does not prescribe quantitative laboratory techniques that require special apparatus; those are noted as more appropriate for research and development rather than routine quality control.
Key Topics
- Scope and purpose: Focus on qualitative adhesion checks for electrodeposited and chemically deposited coatings; excludes complex quantitative tests unsuitable for production QC.
- Test methods reviewed (Section 4): burnishing, ball burnishing, shot peening (including Annex A for silver deposits 100–600 µm), peel (including tape test), file, grinding and sawing, chisel, scribe and grid (cross-hatch), bending, twisting/winding, tensile (including centrifugal adhesion extension), thermal shock, drawing, cathodic tests, Rockwell‑C, scratch, and cavitation.
- Practical limits: e.g., peel test suitability for coatings <125 µm; shot‑peening and other mechanical impact tests vary with coating thickness and ductility.
- Changes in 2017 edition: added Rockwell‑C, scratch and cavitation tests; extended tensile test with centrifugal adhesion testing.
- User advisory: When specific International Standards exist for a particular coating, those tests take precedence and should be agreed between supplier and purchaser.
Applications
- Quality control (QC): Production inspection of plated parts to detect poor adhesion, delamination, blistering or chipping using simple, fast qualitative methods (tape test, scribe/grid, burnishing, bending, etc.).
- Failure analysis: Rapid screening to localize adhesion issues before proceeding to more detailed analysis.
- Research & development: Guides selection of appropriate qualitative checks and indicates when to progress to quantitative test methods in R&D labs (not covered in detail by ISO 2819).
- Procurement and specification: Engineers and spec writers can reference ISO 2819 to specify acceptable adhesion-check methods for suppliers and subcontractors.
- Typical users: plating shops, coating manufacturers, QC engineers, metallurgists, R&D teams, purchasing/specification professionals.
Related Standards
- ISO 2409 (varnishes - cross‑cut test) - referenced as related practice
- ISO 9211‑4 (optical coatings - cross‑hatch concepts)
- ASTM B571 - referenced for several mechanical tests
- Note: Always prefer a specific adhesion test standard for the coating in question when available.
ISO 2819:2017 is a practical, industry‑focused reference that helps organizations select suitable qualitative adhesion tests for metallic coatings and integrate them into production QC and inspection workflows.