Overview
SIST EN ISO 27830:2018, titled Metallic and other inorganic coatings - Requirements for the designation of metallic and inorganic coatings (ISO 27830:2017), establishes a standardized system for the designation of metallic and other inorganic coatings. Published by the Slovenian Institute for Standardization (SIST) and identical to EN ISO 27830:2017, this international standard applies to electrodeposited, autocatalytic, and vapour-deposited coatings on a wide range of substrates, excluding thermally sprayed and porcelain enamel coatings.
The primary objective of ISO 27830:2017 is to promote consistency in how coatings are specified and communicated, thereby improving clarity in procurement, engineering, and manufacturing processes. While this standard outlines the general framework and designation system, detailed technical requirements for specific coatings are provided in other referenced International Standards.
Key Topics
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Scope of Application
- Covers electrodeposited, autocatalytic, and vapour-deposited metallic and inorganic coatings.
- Excludes thermally sprayed and porcelain enamel coatings.
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Designation System
- Provides a format for designating coatings by combining standard numbers, symbols for materials, coating types, thicknesses, and process steps (e.g., heat treatment).
- Uses clear, structured symbols and modules for basis materials, coatings, treatments, and supplementary processes.
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Essential Information for Ordering and Manufacturing
- Lists information to be supplied by purchasers (e.g., standard reference, coating type, significant surfaces, material conditions).
- Addresses additional details such as surface appearance, defects, and quality criteria.
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Structure of Coating Specification
- Supports designations for multi-layer systems, including undercoats and topcoats.
- Allows for specification of service condition severity, critical in ensuring required performance in different environments.
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Sampling and Quality Control
- Offers guidance on inspection sampling plans to ensure compliance with specified requirements.
Applications
The standardized designation format outlined in SIST EN ISO 27830:2018 facilitates effective communication across the supply chain and serves various practical applications, including:
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Technical Documentation and Drawings
- Ensures precise documentation of coating requirements on engineering drawings and procurement materials.
- Reduces ambiguity by using globally recognized symbols and references.
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Procurement and Specification
- Enables consistent and clear specification of metallic and inorganic coatings in contracts and purchase orders.
- Promotes uniform interpretation of coating requirements among manufacturers and suppliers.
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Quality Assurance and Inspection
- Helps in setting up coherent test and inspection procedures by using standardized designations for coatings, thickness, treatments, and other properties.
- Provides references to sampling and quality control standards, supporting robust quality systems.
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Product Design and Development
- Assists designers and engineers in selecting the appropriate coating system based on end-use environment and performance requirements.
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International Trade
- Supports international procurement and manufacturing by harmonizing coating specifications, reducing the risk of miscommunication or non-compliance.
Related Standards
SIST EN ISO 27830:2018 references several key international standards for detailed coating requirements and related practices, such as:
- ISO 1456: Electrodeposited coatings of nickel, chromium, and copper.
- ISO 2064: Measurement of coating thickness.
- ISO 2081: Electroplated zinc coatings on iron or steel.
- ISO 4525: Electroplated nickel plus chromium coatings on plastics.
- ISO 4526: Engineering nickel coatings.
- ISO 4527: Autocatalytic (electroless) nickel-phosphorus alloy coatings.
- ISO 6158: Engineering chromium coatings.
- ISO 4519 & ISO 2859: Sampling procedures for inspection.
For a full list, consult the bibliography of the standard.
Keywords: metallic coatings, inorganic coatings, coating designation, electrodeposited coatings, autocatalytic coatings, vapour-deposited coatings, surface treatment standards, ISO 27830, SIST EN ISO 27830:2018, coating specification, quality control, international standards.