Overview - What ISO 2082:2017 covers
ISO 2082:2017 specifies requirements for electroplated cadmium coatings with supplementary treatments applied to iron and steel. The standard defines what purchasers must supply to the electroplater (e.g., designation, finish, conversion coating type), describes coating and heat‑treatment requirements before and after plating, and sets out inspection, thickness and adhesion considerations. It excludes non‑fabricated sheet/strip/wire, close‑coiled springs, and uses other than protective, intrinsic lubricity, ductility, electrical conductivity and low contact resistance.
Note: cadmium is highly toxic; the standard highlights hazards during heat treatment, welding or soldering and advises strict controls to avoid exposure.
Key technical topics and requirements
- Scope and exclusions - Clarifies parts and uses covered (protective and electrical/contact applications), and what is not applicable.
- Information to be supplied by the purchaser - Reference to ISO 2082, basis metal condition, finish (bright/dull), conversion coating/supplementary treatments, thickness, adhesion and corrosion test requirements, and heat‑treatment needs.
- Designation - A structured format for specifying basis metal, stress‑relief, cadmium thickness, post‑plating heat treatments and conversion coatings on drawings and orders.
- Coating requirements - Appearance, minimum/average thickness measurement (referenced measurement methods), adhesion and acceptance criteria.
- Heat treatments - Stress‑relief before cleaning/deposition and hydrogen‑embrittlement‑relief after plating (ER/SR designations).
- Corrosion testing - Accelerated corrosion testing including neutral salt spray (ISO 9227) and corrosion rating methods (ISO 10289).
- Sampling and inspection - Sampling procedures and acceptance levels (ISO 4519 and referenced test methods).
- Annexes - Annex A: designation of supplementary treatments; Annex B: thickness measurement on small articles; Annex C: guidance on corrosion resistance, rinsing/drying, bulk processing and dyeing of chromate conversion coatings.
Practical applications and users
ISO 2082:2017 is used where the unique properties of electroplated cadmium coatings are required: aerospace, military, electrical connectors, fasteners and other high‑reliability components needing sacrificial corrosion protection, low contact resistance and intrinsic lubricity. Typical users:
- Engineers and specifiers writing procurement documents and drawings
- Electroplaters and surface‑treatment shops
- Quality, inspection and corrosion‑testing personnel
- OEMs in aerospace, defense and high‑reliability electronics
Because of environmental and regulatory constraints (e.g., REACH restrictions on hexavalent chromium), the standard also recognizes chromium‑free conversion alternatives that must meet the specified corrosion performance.
Related standards
Normative references include ISO 9227 (salt spray), ISO 3613 (chromate conversion tests), ISO 9587/9588 (hydrogen embrittlement pre/post treatments), ISO 2064 (coating definitions), ISO 1463/2177/2178/3497/4518 (thickness measurement) and ISO 10289 (corrosion rating). These are essential when implementing ISO 2082:2017 in procurement, testing and inspection.