SIST EN ISO 8993:2018
(Main)Anodizing of aluminium and its alloys - Rating system for the evaluation of pitting corrosion - Chart method (ISO 8993:2018)
Anodizing of aluminium and its alloys - Rating system for the evaluation of pitting corrosion - Chart method (ISO 8993:2018)
This document specifies a chart rating system based on standard charts 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 resulting from penetration of the protective anodic oxidation coating.
Anodisieren von Aluminium und Aluminiumlegierungen - Bewertungssystem für Lochkorrosion - Richtreihenmethode (ISO 8993:2018)
Anodisation de l'aluminium et de ses alliages - Système de cotation de la corrosion par piqûres - Méthode reposant sur des images-types (ISO 8993:2018)
Le présent document spécifie un système de cotation basé sur des images-types qui permet de définir des niveaux de performance de couches anodiques déposées sur l'aluminium et ses alliages, soumises à des essais de corrosion.
Ce système de cotation s'applique à la corrosion par piqûres résultant
— d'essais accélérés,
— de l'exposition à des milieux corrosifs, et
— d'essais pratiques en service.
Le présent document ne tient compte que de la corrosion par piqûres résultant de la pénétration de la couche anodique de protection.
Anodizacija aluminija in aluminijevih zlitin - Ocenjevalni sistem za vrednotenje jamičaste korozije - Tabelarična metoda (ISO 8993:2018)
Ta dokument določa tabelarični ocenjevalni sistem na osnovi standardnih tabel, ki omogoča opredelitev ravni učinkovitosti anodno oksidiranih prevlek na aluminiju in aluminijevih zlitinah, ki so bile preskušene glede odpornosti proti koroziji.
Ta ocenjevalni sistem se uporablja za jamičasto korozijo, ki nastane kot posledica
– pospešenih preskusov,
– izpostavljenosti v korozivnem okolju in
– praktičnih delovnih preskusov.
Ta dokument obravnava samo jamičasto korozijo, ki je posledica prodiranja zaščitne anodno oksidirane prevleke.
OPOMBA: Standard ISO 8994[1] opisuje podoben ocenjevalni sistem, ki temelji na opredeljenih mrežah.
General Information
Relations
Overview
EN ISO 8993:2018 - Anodizing of aluminium and its alloys - Rating system for the evaluation of pitting corrosion - Chart method - specifies a standardized chart-based rating system to define performance levels of anodic oxidation coatings on aluminium and its alloys after corrosion testing. The method applies to pitting corrosion caused by accelerated laboratory tests, exposure to corrosive environments, and practical service conditions, and covers only pits that penetrate the protective anodic coating.
Key topics and technical requirements
- Chart rating system (A–H): Visual reference charts (Figures A.1–A.8) are used to select the chart designation most closely matching the pitting observed. A = no visible corrosion; H = greatest degree covered by the standard.
- Rating numbers (RN) and percent area: Each chart designation maps to a rating number and percentage of the significant surface area affected by pits (Table 1). Examples:
- A (RN 10) = 0.00% pits
- B (RN 9.8) ≤ 0.02%
- C (RN 9.5) ≤ 0.05%
- D (RN 9.3) ≤ 0.07%
- E (RN 9) ≤ 0.10%
- F (RN 8) ≤ 0.25%
- G (RN 7) ≤ 0.5%
- H (RN 6) > 0.5%
- Specimen preparation: The standard specifies preparation and cleaning methods so pits can be discerned, including:
- Abrading with fine pumice slurry, rinsing and air-drying;
- Dipping in 30% nitric acid (prepared per clause) for 5–10 min, then rinse/dry;
- Dissolving the anodic coating in a hot phosphoric/chromic acid mix (useful for dark coatings) - note chromium(VI) hazards;
- Wiping with dilute hydrochloric acid to remove deposited copper, then rinse/dry.
- Area for evaluation: A specified flat test area is required (see clause 4.1) and a mask (50 × 100 mm) may be used to define the evaluated area.
- Reporting: Results are expressed as chart rating and/or rating number and/or percentage area. Test reports must reference ISO 8993:2018 and include product identification, preparation method, comparison method (visual or electronic), ratings, unusual features and test date.
Applications and users
This standard is used by:
- Anodizing manufacturers and surface-treatment labs for quality control and process validation.
- Corrosion engineers and test laboratories conducting accelerated or exposure tests.
- Product designers and specifiers in aerospace, automotive, marine, architecture and electronics who require defined acceptance criteria for anodized aluminium.
- Standards writers and procurement teams incorporating objective pitting acceptance into specifications.
Related standards
- ISO 8994 - Rating system for pitting corrosion - Grid method (alternative)
- ISO 2106 - Determination of mass per unit area of anodic coatings
Keywords: anodizing, aluminium, pitting corrosion, ISO 8993:2018, chart method, anodic oxidation coatings, corrosion testing, rating system.
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2018
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SIST EN ISO 8993:2010
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Anodizing of aluminium and its alloys - Rating system for the evaluation of pitting
corrosion - Chart method (ISO 8993:2018)
Anodisieren von Aluminium und Aluminiumlegierungen - Bewertungssystem für
Lochkorrosion - Richtreihenmethode (ISO 8993:2018)
Anodisation de l'aluminium et de ses alliages - Système de cotation de la corrosion par
piqûres - Méthode reposant sur des images-types (ISO 8993:2018)
Ta slovenski standard je istoveten z: EN ISO 8993:2018
ICS:
25.220.20 Površinska obdelava Surface treatment
77.120.10 Aluminij in aluminijeve zlitine Aluminium and aluminium
alloys
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 8993
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2018
EUROPÄISCHE NORM
ICS 25.220.20; 77.060 Supersedes EN ISO 8993:2010
English Version
Anodizing of aluminium and its alloys - Rating system for
the evaluation of pitting corrosion - Chart method (ISO
8993:2018)
Anodisation de l'aluminium et de ses alliages - Système Anodisieren von Aluminium und
de cotation de la corrosion par piqûres - Méthode Aluminiumlegierungen - Bewertungssystem für
reposant sur des images-types (ISO 8993:2018) Lochkorrosion - Richtreihenmethode (ISO 8993:2018)
This European Standard was approved by CEN on 17 October 2018.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this
European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references
concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN
member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by
translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management
Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,
Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8993:2018 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 8993:2018) has been prepared by Technical Committee ISO/TC 79 "Light
metals and their alloys" in collaboration with Technical Committee CEN/TC 132 “Aluminium and
aluminium alloys” the secretariat of which is held by AFNOR.
This European Standard shall be given the status of a national standard, either by publication of an
identical text or by endorsement, at the latest by April 2019, and conflicting national standards shall be
withdrawn at the latest by April 2019.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 8993:2010.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria,
Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 8993:2018 has been approved by CEN as EN ISO 8993:2018 without any modification.
INTERNATIONAL ISO
STANDARD 8993
Third edition
2018-09
Anodizing of aluminium and its
alloys — Rating system for the
evaluation of pitting corrosion —
Chart method
Anodisation de l'aluminium et de ses alliages — Système de cotation
de la corrosion par piqûres — Méthode reposant sur des images-types
Reference number
ISO 8993:2018(E)
©
ISO 2018
ISO 8993:2018(E)
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
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Phone: +41 22 749 01 11
Fax: +41 22 749 09 47
Email: copyright@iso.org
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Published in Switzerland
ii © ISO 2018 – All rights reserved
ISO 8993:2018(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Procedure for rating . 1
4.1 Preparation of test specimen . 1
4.2 Determination of chart rating . 2
5 Expression of results . 3
6 Test report . 3
Annex A (normative) Rating charts . 4
Bibliography .12
ISO 8993:2018(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
pa
...
Frequently Asked Questions
SIST EN ISO 8993:2018 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Anodizing of aluminium and its alloys - Rating system for the evaluation of pitting corrosion - Chart method (ISO 8993:2018)". This standard covers: This document specifies a chart rating system based on standard charts 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 resulting from penetration of the protective anodic oxidation coating.
This document specifies a chart rating system based on standard charts 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 resulting from penetration of the protective anodic oxidation coating.
SIST EN ISO 8993:2018 is classified under the following ICS (International Classification for Standards) categories: 25.220.20 - Surface treatment; 77.120.10 - Aluminium and aluminium alloys. The ICS classification helps identify the subject area and facilitates finding related standards.
SIST EN ISO 8993:2018 has the following relationships with other standards: It is inter standard links to SIST EN ISO 8993:2010. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
You can purchase SIST EN ISO 8993:2018 directly from iTeh Standards. The document is available in PDF format and is delivered instantly after payment. Add the standard to your cart and complete the secure checkout process. iTeh Standards is an authorized distributor of SIST standards.
제목: SIST EN ISO 8993:2018 - 알루미늄 및 그 합금의 산화알루미늄에 대한 양극산화피막 평가를 위한 평가 시스템 - 차트 방법 (ISO 8993:2018) 내용: 이 문서는 부식 시험에 시행된 알루미늄 및 그 합금에 대한 양극산화피막의 성능 수준을 정의하는 방법으로 표준 차트를 기반으로하는 차트 평가 시스템을 명시합니다. 이 평가 시스템은 가속화된 시험, 부식 환경에 노출 및 실제 서비스 시험에 의한 공식 부식으로 발생한 돌출성 부식에 적용됩니다. 본 문서는 보호 양극산화피막의 관통에 의해 발생하는 돌출성 부식에만 관여합니다. 참고로, ISO 8994는 정의된 격자를 사용하는 비슷한 평가 시스템을 설명합니다.
記事タイトル：SIST EN ISO 8993:2018 - アルミニウムおよびその合金のアノダイジング - 穴あき腐食の評価のための評価システム - チャート法（ISO 8993:2018） 記事内容：この文書は、腐食試験にさらされたアルミニウムおよびその合金の陽極酸化被膜の性能レベルを定義する手法として、標準チャートに基づくチャート評価システムを指定しています。 この評価システムは、加速試験、腐食環境への曝露、および実地サービス試験による穴あき腐食に適用されます。 この文書は、保護陽極酸化被膜が貫通した場合に生じる穴あき腐食のみを考慮しています。 なお、ISO 8994は同様の評価システムを定義したグリッドを使用しています。
The article explains that SIST EN ISO 8993:2018 is a chart rating system used to evaluate pitting corrosion on anodic oxidation coatings on aluminum and its alloys. The rating system is applicable to corrosion caused by accelerated tests, exposure to corrosive environments, and practical service tests. It specifically focuses on pitting corrosion that occurs when the protective anodic oxidation coating is penetrated. ISO 8994 is mentioned as a related standard that uses grids for a similar rating system.
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