NF EN ISO 2143

NF EN ISO 2143

November 2017
Standard Current

Anodizing of aluminium and its alloys - Estimation of loss of absorptive power of anodic oxidation coatings after sealing - Dye-spot test with prior acid treatment

ISO 2143 specifies a method of estimating the loss of absorptive power of anodic oxidation coatings that have undergone a sealing treatment, by dye absorption after acid pretreatment.The method is suitable for use as a production control method and can be applicable to anodic oxidation coatings which may be subjected to weathering or aggressive environments, or where resistance to staining is important.The method is not applicable to those coatings thata) are formed on alloys containing more than 2 % copper or 4 % silicon,b) are sealed by the dichromate process,c) have been given supplementary processing, e.g. oiling, waxing or lacquering,d) are coloured in deep shades, ande) are less than 3 μm thickness.The method is less appropriate where nickel or cobalt salts, or organic additives, have been added to baths used for hydrothermal sealing.

See more
View the extract
Main informations

Collections

National standards and national normative documents

Publication date

November 2017

Number of pages

16 p.

Reference

NF EN ISO 2143

ICS Codes

25.220.20   Surface treatment
77.120.10   Aluminium and aluminium alloys

Classification index

A91-482

Print number

1

International kinship

ISO 2143:2017

European kinship

EN ISO 2143:2017
Sumary
Anodizing of aluminium and its alloys - Estimation of loss of absorptive power of anodic oxidation coatings after sealing - Dye-spot test with prior acid treatment

ISO 2143 specifies a method of estimating the loss of absorptive power of anodic oxidation coatings that have undergone a sealing treatment, by dye absorption after acid pretreatment.

The method is suitable for use as a production control method and can be applicable to anodic oxidation coatings which may be subjected to weathering or aggressive environments, or where resistance to staining is important.

The method is not applicable to those coatings that

a) are formed on alloys containing more than 2 % copper or 4 % silicon,

b) are sealed by the dichromate process,

c) have been given supplementary processing, e.g. oiling, waxing or lacquering,

d) are coloured in deep shades, and

e) are less than 3 μm thickness.

The method is less appropriate where nickel or cobalt salts, or organic additives, have been added to baths used for hydrothermal sealing.

Replaced standards (1)
NF EN ISO 2143
November 2010
Standard Cancelled
Anodizing of aluminium and its alloys - Estimation of loss of absorptive power of anodic oxidation coatings after sealing - Dye spot test with prior acid treatment

Le présent document spécifie une méthode permettant d'apprécier la perte du pouvoir absorbant des couches anodiques ayant subi un traitement de colmatage, par un essai de coloration après une action acide préalable. La méthode convient au contrôle de production et s'applique aux couches anodiques qui peuvent être soumises aux intempéries ou à des milieux agressifs, ou lorsque la résistance aux taches est importante. Elle n'est pas applicable : - aux couches qui sont formées sur les alliages contenant plus de 2 % de cuivre ou 4 de silicium ; - sont colmatées dans des solutions contenant du dichromate ; - ont subi un traitement supplémentaire; par exemple huile, cire ou laque ; - sont colorées de couleurs foncées ; - ont une épaisseur inférieure à 3 mm. La méthode est moins appropriée lorsque des sels de nickel ou de cobalt ou des additifs organiques ont été ajoutés au bain de colmatage.

Table of contents
  • Avant-propos
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Principe
  • 5 Réactifs
  • 6 Éprouvettes
  • 7 Mode opératoire
  • 8 Expression des résultats
  • Annexe A (normative) Interprétation des résultats de l'essai à la goutte de colorant
  • Bibliographie
What is the Redline format?
The Redline + service - standards comparator allows you to easily and simply identify major changes between the current standard and its last canceled version.

At a glance, you will be able to identify the additions, deletions or modifications to a text, table, figure and formula.
At a glance, you will be able to identify the additions, deletions or modifications to a text, table, figure and formula

The Redlines + service is offered to you on the collection of French standards in force, in French language and in HTML and PDF format.

For an overview of the service, click on View a standard in redline format
Need to identify, monitor and decipher standards?

COBAZ is the simple and effective solution to meet the normative needs related to your activity, in France and abroad.

Available by subscription, CObaz is THE modular solution to compose according to your needs today and tomorrow. Quickly discover CObaz!

Request your free, no-obligation live demo

I discover COBAZ