# ISO 2143:1981 — Withdrawn and superseded ISO standards

For ISO 2143:1981, item title is Anodizing of aluminium and its alloys — Estimation of loss of absorptive power of anodic oxide coatings after sealing — Dye spot test with prior acid treatment; status code is 9599; successor is ISO/WD 2143 | ISO 2143:2010; withdrawn / published date is 1981-08-01, recorded from its source on 2026-08-05.

- **Identifier:** ISO 2143:1981 _(verified: appears in the quote below)_
- **Item title:** Anodizing of aluminium and its alloys — Estimation of loss of absorptive power of anodic oxide coatings after sealing — Dye spot test with prior acid treatment _(verified: appears in the quote below)_
- **Status code:** 9599 _(verified: appears in the quote below)_
- **Successor:** ISO/WD 2143 | ISO 2143:2010
- **Withdrawn / published date:** 1981-08-01 _(verified: appears in the quote below)_

## What the source says

> 6934,IS,,ISO 2143:1981,Anodizing of aluminium and its alloys — Estimation of loss of absorptive power of anodic oxide coatings after sealing — Dye spot test with prior acid treatment,Anodisation de l'aluminium et de ses alliages — Appréciation de la perte du pouvoir absorbant des couches d'oxydes anodiques après colmatage — Essai à la goutte de colorant avec action acide préalable,1981-08-01,1,['25.220.20'],ISO/TC 79/SC 2,9599,,"[1276,51486]","['en','fr']",3,"<p>The resistance of anodic oxide coatings to absorption of dyes may give information on the quality of sealing. The method is applicable to anodic oxide coatings to be subjected to weathering or to aggressive environments and, in all c

## Source

- https://isopublicstorageprod.blob.core.windows.net/opendata/_latest/iso_deliverables_metadata/csv/iso_deliverables_metadata.csv

Last verified: 2026-08-05. Review by: 2027-02-01.
Part of [Withdrawn and superseded ISO standards](https://referencesource.org/iso-standard-supersessions/).