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ISO 8502-6:2020

Preparation of steel substrates before application of paints and related products — Tests for the assessment of surface cleanliness — Part 6: Extraction of water soluble contaminants for analysis (Bresle method)

Edition date: 2020-04-30
In Force
Available languages: English, French
Summary:

Le présent document spécifie une méthode d'extraction en surface, en vue de l'analyse, des contaminants solubles dans l'eau, au moyen de cellules souples telles que des pastilles adhésives ou des manchons qui peuvent être fixés sur toute surface, sans se soucier de leur forme (plate ou ronde) et de leur orientation (dans toutes les directions, y compris vers le bas).

La méthode décrite convient pour l'emploi in situ en vue de déterminer la présence de contaminants solubles dans l'eau avant de peindre ou d'effectuer un traitement similaire.

Le présent document ne traite pas de l'analyse consécutive des contaminants qui ont été dissous. Les méthodes d'analyse appropriées à l'emploi in situ sont décrites dans d'autres parties de l'ISO 8502.

NOTE Il est possible que la méthode d'extraction donne un résultat faux négatif ou qu'elle ne permette pas d'extraire de la surface toutes les substances solubles dans l'eau, pour les raisons suivantes: a) Des substances solubles dissimulées dans des fissures ou sous des pliures de métal; b) Des substances solubles dissimulées sous les couches de corrosion, les couches de passivation produites par les inhibiteurs de corrosion, dans l'huile, la graisse, ou d'autres fines couches (films) invisibles.



This document specifies a method of extracting, for analysis, water soluble contaminants from a surface by use of flexible cells in the form of adhesive patches or sleeves which can be attached to any surface, regardless of its shape (flat or curved) and its orientation (facing in any direction, including downwards).

The method described is suitable for use in the field to determine the presence of water soluble contaminants before painting or a similar treatment.

This document does not cover the subsequent analysis of the contaminants that have been dissolved. Methods of analysis suitable for field use are described in other parts of ISO 8502.

NOTE The extraction method might give a false negative or not take all the water-soluble material off the surface because of: a) Soluble materials hiding in the crevices or under folds of metal; b) Soluble materials under corrosion layers, passivation layers produced by corrosion inhibitors, oil, grease, or other non-visible thin films.
ICS: 25.220.10-Surface preparation
CTN: ISO/TC 35/SC 12 - 48054

Standards Cancellations

Anula a ISO 8502-6:2006

International Equivalence

Identic UNE-EN ISO 8502-6:2021

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