NF EN ISO 4521

NF EN ISO 4521

November 2008
Standard Current

Metallic and other inorganic coatings - Electrodeposited silver and silver alloy coatings for engineering purposes - Specification and test methods

ISO 4521:2008 specifies requirements for electroplated silver and silver alloy coatings for electrical, electronic and other engineering applications, including test methods. Engineering applications are defined as those in which the coating essentially serves a non-decorative purpose.Although ISO 4521:2008 does not specify the condition, finish or surface roughness of the basis material prior to electroplating, the appearance and serviceability of electroplated silver and silver alloy coatings depends on the condition of the basis material. It is essential that the purchaser specifies the surface finish and roughness of the basis material in order to conform to the product requirements.ISO 4521:2008 does not apply to coatings on screw threads or to coatings on sheet, strip or wire in the non-fabricated form.

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Main informations

Collections

National standards and national normative documents

Publication date

November 2008

Number of pages

30 p.

Reference

NF EN ISO 4521

ICS Codes

25.220.40   Metallic coatings

Classification index

A91-091

Print number

1 - 03/11/2008

International kinship

ISO 4521:2008

European kinship

EN ISO 4521:2008
Sumary
Metallic and other inorganic coatings - Electrodeposited silver and silver alloy coatings for engineering purposes - Specification and test methods

ISO 4521:2008 specifies requirements for electroplated silver and silver alloy coatings for electrical, electronic and other engineering applications, including test methods. Engineering applications are defined as those in which the coating essentially serves a non-decorative purpose.

Although ISO 4521:2008 does not specify the condition, finish or surface roughness of the basis material prior to electroplating, the appearance and serviceability of electroplated silver and silver alloy coatings depends on the condition of the basis material. It is essential that the purchaser specifies the surface finish and roughness of the basis material in order to conform to the product requirements.

ISO 4521:2008 does not apply to coatings on screw threads or to coatings on sheet, strip or wire in the non-fabricated form.

Replaced standards (4)
NF ISO 4521
September 1987
Standard Cancelled
Metallic coatings. Electrodeposited silver and silver alloy coatings for engineering purposes.

NF ISO 4522-1
September 1987
Standard Cancelled
Metallic coatings. Test methods for electrodeposited silver and silver alloys coatings. Part 1 : determination of coating thickness.

NF ISO 4522-2
September 1987
Standard Cancelled
Metallic coatings. Test methods for electrodeposited silver and silver alloy coatings. Part 2 : adhesion tests.

NF ISO 4522-3
February 1989
Standard Cancelled
Metallic coatings. Test methods for electrodeposited silver and silver alloy coatings. Part 3 : determination of the presence of residual salts.

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Table of contents
  • Avant-propos
    iv
  • Introduction
    v
  • 1 Domaine d'application
    1
  • 2 Références normatives
    1
  • 3 Termes et définitions
    2
  • 4 Informations à fournir par l'acheteur à l'électroplaste
    3
  • 4.1 Informations essentielles
    3
  • 4.2 Informations supplémentaires
    3
  • 5 Désignation
    4
  • 5.1 Généralités
    4
  • 5.2 Spécifications relatives à la désignation
    4
  • 5.3 Désignation du matériau de base
    4
  • 5.4 Désignation des exigences relatives au traitement thermique
    5
  • 5.5 Exemples de désignations
    5
  • 6 Exigences
    5
  • 6.1 Généralités
    5
  • 6.2 Aspect
    6
  • 6.3 Épaisseur
    6
  • 6.4 Porosité
    6
  • 6.5 Essais accélérés de corrosion
    6
  • 6.6 Composition
    6
  • 6.7 Traitement de détente avant dépôt électrolytique
    7
  • 6.8 Traitement thermique contre la fragilisation par l'hydrogène après dépôt électrolytique
    7
  • 6.9 Adhérence
    7
  • 6.10 Propriétés électriques
    7
  • 6.11 Microdureté
    7
  • 6.12 Aptitude au brasage tendre
    8
  • 6.13 Résistance à l'usure
    8
  • 6.14 Ductilité
    8
  • 6.15 Sous-couches
    8
  • 6.16 Absence de contamination
    8
  • 6.17 Traitements antiternissement
    8
  • 7 Échantillonnage
    9
  • Annexe A (normative) Exigences relatives aux sous-couches
    10
  • Annexe B (normative) Méthodes de mesurage de l'épaisseur des dépôts électrolytiques d'argent et d'alliages d'argent
    12
  • Annexe C (normative) Essais d'adhérence
    16
  • Annexe D (normative) Recherche des sels résiduels
    18
  • Bibliographie
    20
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