ISO 10683-2014 pdf free.Fasteners-Non-electrolytically applied zinc flake coatings.
ISO 10683 specifies requirements for non-electrolytically applied zinc flake coatings
for steel fasteners. It applies to coatings:
— with or without hexavalent chromium;
— with or without top coat;
— with or without lubricant (integral lubricant and/or subsequently added lubricant).
National regulations for the restriction or prohibition of certain chemical elements should be taken into account in the countries or regions concerned.
It applies to bolts, screws, studs and nuts with 150 metric thread, to fasteners with non-ISO metric thread, and to non-threaded fasteners such as washers, pins, clips, etc.
NOTE Coatings in accordance with this International Standard are especially used for high strength fasteners (1 000 MPa) to avoid risk of internal hydrogen embrittlement (see 4,4).
Information for design and assembly of coated fasteners is given in Annex A.
This International Standard does not specify requirements for such fastener properties as weldability
or paintability. It does not apply to mechanically applied zinc coatings.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 1463, Metallic and oxide coatings — Measurement of coating thickness — Microscopical method
ISO 1502, ISO general-purpose metric screw threads — Gauges and gauging
ISO 189 1-2, Fasteners — Terminology — Part 2: Vocabulary and definitions for coatings’)
ISO 3269, Fasteners — Acceptance inspection
ISO 3613:20 10, Metallic and other inorganic coatings — Chromate conversion coatings on zinc, cadmium, aluminium-zinc alloys and zinc-aluminium alloys — Test methods
ISO 6988, Metallic and other non organic coatings — Sulfur dioxide test with general condensation of moisture
ISO 8991, Designation system for fasteners
ISO 9227:2012, Corrosion tests in artificial atmospheres — Salt spray tests
ISO 16047, Fasteners — Torque/clamp force testing
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 189 1-2 apply.
4 General characteristics of the coating
4.1 Zinc flake coating systems
Zinc flake coating systems are produced by applying a zinc flake dispersion to the surface of a steel fastener, usually with the addition of aluminium flakes, in a suitable medium. Under the influence of heat (curing), a bonding amongst flakes and also between flakes and substrate is generated, thus forming an inorganic surface coating sufficiently electrically conducting to ensure cathodic protection. The coating may or may not contain hexavalent chromium, Cr(VI).
Special techniques may be necessary to avoid excessive or insufficient coating thickness.
Special techniques may be necessary to prevent lightweight and/or flat fasteners from sticking together (e.g. washers, clips, fasteners with captive washer, flanged nuts).
An additional top coat can be applied to increase corrosion resistance and/or to achieve specific properties (e.g. torque/tension properties, chemical resistance, aspect, colour, electrical insulation/conductivity – see A2).
4.2 Composition of the systems
There are four basic zinc flake coating systems as shown in Figure 1.ISO 10683 pdf free download.