Overview
EN ISO 12679:2015 (identical to ISO 12679:2011) provides practical recommendations for thermal spraying. It gives general guidelines for producing metallic, metal‑ceramic, oxide‑ceramic and plastic coatings on metallic and non‑metallic substrates. The standard covers spray set‑up, manufacturing practice, monitoring, quality assurance and both non‑destructive and destructive testing of components and accompanying specimens. It also describes common negative effects of thermal spraying and advises on their prevention. Note: permissible coating loads and formal quality evaluation categories are excluded because they depend on operating conditions. EN ISO 12679:2015 can be applied for contract purposes.
Key topics and technical scope
The standard addresses the full thermal‑spraying workflow and associated requirements:
- Parent materials & component geometry - considerations affecting bond strength and process selection
- Spray materials, supply and handling - powders, wires, rods and plastics suitable for thermal spraying
- Gases and liquid fuels used in flame and other thermal spray processes
- Spray equipment and auxiliary systems - spray devices, rotating fixtures, robots and handling systems
- Surface preparation - degreasing, grit‑blasting, masking and other pretreatments essential for adhesion
- Spraying procedure specification (SPS) and application practices for reproducible coatings
- Post‑treatment and finishing - thermal or mechanical treatments, sealing and machining of coatings
- Health, safety and environmental aspects - workplace safety, emissions and handling precautions
- Quality assurance & personnel qualification - process control, inspection regimes and operator competence
- Testing methods - guidance on non‑destructive and destructive tests, monitoring and acceptance inspection
The document also summarizes advantages (low parent‑material heating, ability to coat large or complex parts, typical lower thickness limit around 10 µm) and limitations (micro‑porosity, adhesive bonding without thermal post‑treatment, residual stresses).
Practical applications
EN ISO 12679 is used wherever thermal spray coatings are employed to:
- Improve wear and corrosion resistance
- Restore worn components (repair and remanufacture)
- Modify thermal or electrical surface properties (insulation, conductivity, heat transfer)
- Enhance appearance or provide a paintable bond coat
Industries: aerospace, power generation, automotive, oil & gas, heavy engineering, tooling and surface‑treatment service providers.
Who should use this standard
- Coating process engineers and specifiers
- Quality managers and NDT inspectors
- Maintenance and repair organizations (remanufacturing)
- Procurement and contract authors writing coating specifications
- Equipment manufacturers and spray operators
Related standards
EN ISO 12679 references and aligns with other thermal‑spray standards, for example:
Keywords: EN ISO 12679:2015, ISO 12679:2011, thermal spraying, thermal spray recommendations, coating quality, surface preparation, spraying procedure, thermal sprayers.