ISO 1891-2:2014

Overview

ISO 1891-2:2014 - Fasteners - Terminology - Part 2: Vocabulary and definitions for coatings is an international terminology standard that defines terms and meanings used for coatings applied to fasteners. Its primary focus is on coatings intended for corrosion protection and functional purposes. The document standardizes vocabulary across coating types, systems, processes and test descriptors to ensure consistent communication in specifications, testing and procurement for fastener coatings.

Key Topics

The standard organizes coating terminology into clearly defined topic groups:

• General terms - foundational vocabulary for coatings and fasteners.
• Coatings for fasteners - names and descriptions of coating types commonly applied to screws, bolts, nuts and other fasteners.
• Coating systems - terminology related to multilayer systems and combined treatments.
• Pre- and post-coating process steps - standardized names for surface preparation, cleaning, passivation and post-treatments.
• Coating processes - process-related terms covering application methods and process stages.
• Coating properties and testing - vocabulary for performance attributes (e.g., adhesion, corrosion resistance) and relevant test descriptors.
• Miscellaneous - other relevant definitions and usage notes.
• Annex A provides a multilingual alphabetical index of terms (official ISO languages plus additional equivalents).

Technical requirement: ISO 1891-2 does not specify testing methods or performance limits itself; rather it establishes consistent terminology to be used with product and testing standards (e.g., ISO 4042, ISO 10683, ISO 10684).

Applications

ISO 1891-2 is intended for practical use where accurate, unambiguous language about fastener coatings is critical:

• Manufacturers and coating suppliers - to describe products, coatings and application processes in specifications and data sheets.
• Quality assurance and test laboratories - for consistent reporting of test methods and properties.
• Procurement and technical purchasing - to ensure clear contract requirements and acceptance criteria.
• Design and engineering teams - to specify functional coatings and corrosion protection in assemblies.
• Standards writers and regulatory bodies - to harmonize terminology across related standards.

Using ISO 1891-2 improves clarity in specifications, reduces misinterpretation in international trade and supports accurate cross-referencing with fastener coating standards.

Related Standards

Key related standards referenced or intended for joint use include:

• ISO 4042 (electroplated coatings)
• ISO 10683 (non‑electrolytically applied zinc flake coatings)
• ISO 10684 (hot dip galvanized coatings) Also referenced: ISO 2080, ISO 6988, ISO 16426.

Keywords: ISO 1891-2:2014, fastener coatings terminology, coating definitions, corrosion protection coatings, fastener standards, ISO 4042, ISO 10683, ISO 10684.