Overview
ISO 12679:2011 - "Thermal spraying - Recommendations for thermal spraying" provides practical, general guidance for producing metallic, metal‑ceramic, oxide‑ceramic and plastic thermal spray coatings on metallic and non‑metallic substrates. The standard focuses on best practices for spray set‑up, manufacturing, monitoring, quality assurance, and both destructive and non‑destructive testing of coatings and accompanying specimens. ISO 12679:2011 can be referenced in contracts but does not specify permissible coating loads or numeric quality categories, since those depend on actual operating conditions.
Keywords: ISO 12679:2011, thermal spraying, thermal spray coatings, spray materials, quality assurance
Key technical topics and requirements
ISO 12679:2011 covers the following technical areas and practical recommendations:
- Parent material considerations
- Influence of substrate thermal conductivity, surface condition and heat treatment on bond strength.
- Storage and handling to avoid damage or contamination.
- Component geometry
- Accessibility, spray distance and angle, edge and radius design recommendations to avoid coating failure.
- Spray materials and selection
- Guidance on metals, alloys, metal‑ceramics, oxide ceramics, plastics and hybrid feedstocks.
- Criteria for selecting spray materials based on service demands (wear, corrosion, temperature).
- Gases, liquid fuels and spray equipment
- Practical setup advice for flame, arc, plasma and HVOF processes and associated auxiliary equipment.
- Surface preparation
- Degreasing, grit‑blasting and masking practices prior to spraying.
- Spraying procedure and post‑treatment
- Recommendations for specifying spraying procedures, applying coatings and suitable finishing/sealing.
- Testing and inspection
- Use of non‑destructive testing (e.g., penetrant testing) and destructive tests on components and specimens; guidance for monitoring and acceptance.
- Quality assurance and personnel
- Quality‑assurance measures, documentation and personnel qualification recommendations.
- Health, safety and environment
- Occupational and environmental considerations associated with thermal spraying operations.
Keywords: surface preparation, spray equipment, HVOF, plasma spraying, non‑destructive testing
Practical applications and target users
ISO 12679:2011 is intended for professionals involved in specification, production and inspection of thermal sprayed coatings:
- Coating engineers and technologists
- Quality assurance managers and inspectors
- Production supervisors and process planners
- Maintenance, repair and overhaul (MRO) organizations
- Procurement and contract writers specifying coating work
Typical applications include wear‑ and corrosion‑resistant overlays, refurbishment of worn parts, thermal barrier or conductive coatings, and preparatory recommendations for downstream finishing.
Related standards
ISO 12679:2011 references and aligns with related ISO documents used in practice, including:
These related standards provide complementary requirements for material supply, equipment approval, characterization, post‑treatment and inspection.