International Standard
ISO 8994:2018
Anodizing of aluminium and its alloys — Rating system for the evaluation of pitting corrosion — Grid method
Reference number
ISO 8994:2018
Edition 3
2018-11
© ISO 2024
International Standard
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Published (Edition 3, 2018)
This standard was last reviewed and confirmed in 2024. Therefore this version remains current.

ISO 8994:2018

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Abstract

This document specifies a grid rating system that provides a means of defining levels of performance of anodic oxidation coatings on aluminium and its alloys that have been subjected to corrosion tests.

This rating system is applicable to pitting corrosion resulting from

— accelerated tests,

— exposure to corrosive environments, and

— practical service tests.

This document takes into account only pitting corrosion of the basis metal resulting from penetration of the protective anodic oxidation coating.

NOTE 1 ISO 8993[1] describes a similar rating system based on defined chart scales.

NOTE 2 The grid rating system is frequently used for rating the results of short-term corrosion tests for relatively thin anodic oxidation coating, such as those used in the automotive industry.

General information

  • Status
     : Published
    Publication date
     : 2018-11
    Stage
    : International Standard confirmed [90.93]
  • Edition
     : 3
    Number of pages
     : 4
  • Technical Committee :
    ISO/TC 79/SC 2
    ICS :
    77.060  25.220.20 
  • RSS updates

Life cycle

Sustainable Development Goals

This standard contributes to the following Sustainable Development Goals

12
Responsible Consumption and Production
9
Industry, Innovation and Infrastructure

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