ISO 8502-15-2020 Vorbereitung von Stahluntergründen vor dem Lackieren und verwandten Produkten - Tests zur Beurteilung der Oberflächenreinheit - Teil 15: Extraction of soluble contaminants by acid extraction for analysis

ISO 8502-15-2020 Vorbereitung von Stahluntergründen vor dem Lackieren und verwandten Produkten – Tests zur Beurteilung der Oberflächenreinheit – Teil 15: Extraction of soluble contaminants by acid extraction for analysis

Einführung
ISO (Internationale Standardisierungsorganisation) ist ein globaler Verband nationaler Normungsgremien (ISO-Mitgliedsorganisationen). Die Entwicklung internationaler Standards erfolgt in der Regel durch technische Komitees der ISO. Jede Mitgliedsgruppe, die sich für ein Thema interessiert, für das ein Fachausschuss eingerichtet wurde, hat das Recht, im Ausschuss vertreten zu sein. Internationale Organisationen, An dieser Arbeit sind auch Regierungen und Nichtregierungsorganisationen beteiligt, die mit der ISO in Kontakt stehen. ISO arbeitet eng mit der International Electrotechnical Commission zusammen (IEC) in allen Fragen der elektrischen Normung.

Teil 1 of the ISO/IEC Directive describes the procedures used to develop this document and for further maintenance. Insbesondere, Es sollte auf die unterschiedlichen Genehmigungskriterien geachtet werden, die für verschiedene Arten von ISO-Dokumenten erforderlich sind. This document has been drafted in accordance with the editorial rules of ISO/IEC Directive Part 2 (siehe iso.org/directives).

Bitte beachten Sie, dass einige Elemente dieses Dokuments Gegenstand von Patentrechten sein können. ISO ist nicht dafür verantwortlich, einige oder alle dieser Patente zu identifizieren. Details of any patent rights identified during the development of the document will be found in the introduction and/or list of ISO Patent declarations received (siehe iso.org/patents).

Any trade names used in this document are provided as information for the convenience of the user and do not constitute an endorsement.

ISO 8502-15-2020 Vorbereitung von Stahluntergründen vor dem Lackieren und verwandten Produkten – Tests zur Beurteilung der Oberflächenreinheit – Teil 15: Extraction of soluble contaminants by acid extraction for analysis

For an explanation of the voluntary nature of the standard, the meaning of ISO-specific terms and expressions related to conformity assessment, and information on ISO’s compliance with World Trade Organization (WTO) principles in Technical Barriers to Trade (TBT), sehen

Iso.org/iso/foreword.html.

This document was prepared by Technical Committee ISO/TC 35, Farben und Lacke, Unterausschuss SC 12, Preparing steel substrates prior to the application of paints and related products.

Eine Liste aller Teile in der ISO 8502 Serien finden Sie auf der ISO-Website.

Any feedback or questions on this document should be referred to the user’s national standards body. A complete list of these institutions can be found at iso.org/members.html.

einführen
The performance of protective coatings applied to steel paints and related products is significantly affected by the state of the steel surface prior to coating. The main factors known to affect this performance are:

A) The presence of rust and oxide;

B) the presence of surface contaminants, including salt, Staub, oil and grease;

C) Surface profile.

Die ISO 8501, ISO 8502 und ISO 8503 series are ready to provide methods for assessing these factors, while the ISO 8504 series provides guidance on preparation methods that can be used to clean steel substrates, indicating the ability of each method to achieve a specific level of cleanliness.

These international standards do not contain recommendations for protective coating systems for steel surfaces. They also do not contain recommendations for surface quality requirements for specific situations, Auch wenn die Oberflächenqualität einen direkten Einfluss auf die Wahl der aufzutragenden Schutzbeschichtung und deren Leistung haben kann. Such recommendations can be found in other documents, such as national standards and codes of practice. Users of these international standards need to ensure that the specified quality is:

– Compatible and appropriate with the environmental conditions to which the steel will be exposed and the protective coating system to be used;

– Within the capacity of the prescribed cleaning procedures.

The above four series of international standards cover the following aspects of steel substrate preparation:

Visual assessment of surface cleanliness (siehe ISO 8501 series);

– Surface cleanliness assessment test (siehe ISO 8502 series);

– Sand blasting to clean the surface roughness characteristics of steel substrates (siehe ISO 8503 series);

– Surface treatment method (siehe ISO 8504 series).

Each of these series of international standards is divided into separate sections.

This document, together with other parts of the ISO 8502 series, specifies tests for surface cleanliness assessment. Related to such tests, there are several methods for extracting and analyzing soluble contaminants on surfaces to be painted. Some of these methods are based on wipes of relatively large test surfaces. This technique provides an average of the pollutants present, but it may hide local concentrations of pollutants. Wipes may not ensure sufficient penetration to dissolve all deep contaminants, such as ferrite. Zusätzlich, the solvent used will affect the dissolution rate and dissolved contaminants. This document covers sampling with weak acids as solvents.

Jedoch, there are other methods that use small cells as liquids to remove and collect surface contaminants. The battery (rigid or flexible) is attached to the test surface where soluble contaminants may be present, such as where pitting occurs. This technique often provides more accurate contaminant point values.

1 Geltungsbereich
This document specifies a method for extracting surface acid-soluble contaminants for analysis using a flexible battery in the form of a patch or sleeve that can be affixed to any surface regardless of its shape (flat or curved) and orientation (facing in any direction, including downward).

The method described is suitable for field use to determine the presence of acid-soluble contaminants prior to painting or similar treatment.

This document does not include a follow-up analysis of dissolved contaminants. Analytical methods suitable for field use are described in other parts of ISO 8502 (z.B. ISO 8502-5).

This document is procedurally similar to but not equivalent to ISO 8502-6. The main difference lies in the solvent used and the subsequent analysis that can be performed on the extracted solution.

2 Normative Referenzdokumente
When the following documents are referenced in the text, some or all of them constitute the requirements of this document. Für datierte Referenzen, Es gilt ausschließlich die zitierte Fassung. Für undatierte Zitate, a new version of the referenced document (einschließlich etwaiger Überarbeitungen) gilt.

ISO 554, Standard Atmospheric specification for conditioning and/or testing

ISO 8501-1, Vorbereitung von Stahluntergründen vor dem Lackieren und verwandten Produkten – Visual assessment of surface cleanliness – Teil 1: Grade of corrosion and readiness of uncoated steel substrates and of steel substrates after removal of previous coatings in their entirety

ISO 8503-2, Vorbereitung von Stahluntergründen vor dem Lackieren und verwandten Produkten – Surface roughness characteristics of sandblasted steel substrates – Teil 2: Method for grading the surface profiles of abrasive sandblasted steel – Comparison procedure

ISO/IEC 17025, General requirements for testing and calibration laboratory competence

3 Begriffe und Definitionen
In diesem Dokument sind keine Begriffe und Definitionen aufgeführt.

ISO und IEC unterhalten unter folgenden Adressen Terminologiedatenbanken zur Standardisierung:

– ISO-Online-Browsing-Plattform: iso.org/obp

– IEC-Elektropädie: verfügbar unter electropedia.org

Nur der Standardinformationsbereich ist öffentlich. Um den vollständigen Inhalt zu sehen, Sie müssen den Standard über die offiziellen Kanäle erwerben.

ISO 8502-15-2020 Vorbereitung von Stahluntergründen vor dem Lackieren und verwandten Produkten – Tests zur Beurteilung der Oberflächenreinheit – Teil 15: Extraction of soluble contaminants by acid extraction for analysis

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