EN ISO 8502-2:2005

Preparation of steel substrates before application of paints and related products - Tests for the assessment of surface cleanliness - Part 2: Laboratory determination of chloride on cleaned surfaces (ISO 8502-2:2005)

ISO 8502-2:2005 describes a method for the determination of chloride-containing salts that are readily soluble in water and are present on a steel surface. The method is also applicable to previously coated surfaces. It will normally be used in a laboratory using washings sampled from surfaces on site.
ISO 8502-2:2005 is applicable to the determination of salts that have been deposited on the steel surface before, during or after the cleaning operations.
ISO 8502-2:2005 is not applicable to surfaces treated with chromate, nitrite or amine, which are commonly used as inhibitors in the water when wet blast-cleaning. This is because a chromate concentration of 10 mg/l or greater or a nitrite concentration of 20 mg/l or greater in the wash water interferes with the determination of the chloride. Also the amine inhibitors can form a hydroxide boundary layer (not water soluble) over the substrate and prevent the water from contacting the underlying salt for its removal. An iron(III) ion concentration of 10 mg/l also interferes with the determination, but the iron(III) ions are concentrated in the rust deposits, which are removed from the test solution by filtration.

Vorbereitung von Stahloberflächen vor dem Auftragen von Beschichtungsstoffen - Prüfungen zum Beurteilen der Oberflächenreinheit - Teil 2: Laborbestimmung von Chlorid auf gereinigten Oberflächen (ISO 8502-2:2005)

Dieser Teil von ISO 8502 beschreibt ein Verfahren zum Bestimmen von in Wasser leicht löslichen chloridhaltigen Salzen, die sich auf einer Stahloberfläche befinden. Das Verfahren ist auch bei beschichteten Oberflächen anwendbar. Es wird üblicherweise in einem Labor an Waschflüssigkeiten durchgeführt, die auf Baustellen von Oberflächen gesammelt wurden.
Das Verfahren ist zum Bestimmen von Salzen anwendbar, die durch den Reinigungsprozess eingeschleppt wurden oder die sich vor oder nach dem Reinigen abgelagert haben.
ANMERKUNG   Obwohl das Verfahren zur Chloridbestimmung im allgemeinen genau ist, ist die Präzision des Verfahrens durch die Unsicherheiten bei der Probenahme eingeschränkt. Außerdem sind Spuren von Eisenchlorid, das sich in Vertiefungen befindet, schwierig zu extrahieren.
Das Prüfverfahren ist nicht anwendbar bei Oberflächen, die mit Chromat oder Nitrit behandelt worden sind. Chromate und Nitrite werden im allgemeinen beim Nassstrahlen als Inhibitoren im Wasser verwendet. Eine Chromatkonzentration von 10 mg/I oder größer oder eine Nitritkonzentration von 20 mg/I oder größer im Waschwasser stört die Chloridbestimmung.
Eine Eisen(III)-ionenkonzentration von 10 mg/I stört ebenfalls die Bestimmung, aber die Eisen(III)-ionen sind im Rost angereichert, der durch Filtrieren aus der Probenlösung entfernt wird.

Préparation des subjectiles d'acier avant application de peintures et de produits assimilés - Essais pour apprécier la propreté d'une surface - Partie 2: Recherche en laboratoire des chlorures sur les surfaces nettoyées (ISO 8502-2:2005)

L'ISO 8502-2:2005 décrit une méthode de recherche des sels contenant des chlorures solubles dans l'eau et présents à la surface d'un subjectile d'acier. Cette méthode est également applicable à des surfaces qui ont déjà été revêtues. Elle doit être normalement utilisée dans un laboratoire sur des eaux de lavage échantillonnées à partir de surfaces in situ.
L'ISO 8502-2:2005 est applicable à la recherche de sels ayant été déposés à la surface du subjectile avant, pendant ou après le nettoyage.
L'ISO 8502-2:2005 ne s'applique pas aux surfaces traitées avec des chromates, des nitrites ou de l'amine, qui sont couramment utilisés comme inhibiteurs lorsqu'on pratique le sablage humide. En effet une concentration de chromates de 10 mg/l ou plus ou une concentration de nitrites de 20 mg/l ou plus dans l'eau de lavage interfère avec la recherche des chlorures. De plus, les inhibiteurs de l'amine peuvent entraîner la formation d'une couche limite d'hydroxyde (non soluble dans l'eau) sur le subjectile, empêchant ainsi l'eau de pouvoir atteindre le sel situé en dessous. Une concentration d'ions fer(III) de 10 mg/l interfère également avec la recherche des chlorures, mais les ions fer(III) sont concentrés dans les dépôts de rouille que l'on enlève de la solution d'essai par filtration.

Priprava jeklenih podlag pred nanašanjem barv in sorodnih izdelkov – Preskusi ugotavljanja čistosti podlage – 2. del: Laboratorijsko določevanje kloridov na očiščenih površinah (ISO 8502-2:2005)

General Information

• Status: Withdrawn
• Publication Date: 14-Oct-2005
• Withdrawal Date: 13-Apr-2025
• ICS: 25.220.10 - Surface preparation
• Technical Committee: CEN/TC 139 - Paints and varnishes
• Drafting Committee: CEN/TC 139 - Paints and varnishes
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 08-Feb-2017
• Completion Date: 14-Apr-2025
• Ref Project: SIST EN ISO 8502-2:2006 - Preparation of steel substrates before application of paints and related products - Tests for the assessment of surface cleanliness - Part 2: Laboratory determination of chloride on cleaned surfaces (ISO 8502-2:2005)

Relations

• Replaces: EN ISO 8502-2:1999 - Preparation of steel substrates before application of paints and related products - Tests for the assessment of surface cleanliness - Part 2: Laboratory determination of chloride on cleaned surfaces (ISO 8502-2:1992)
• Effective Date: 22-Dec-2008
• Replaced By: EN ISO 8502-2:2017 - Preparation of steel substrates before application of paints and related products - Tests for the assessment of surface cleanliness - Part 2: Laboratory determination of chloride on cleaned surfaces (ISO 8502-2:2017)
• Effective Date: 08-Jun-2022

Standards Content (Sample)

SLOVENSKI STANDARD
01-april-2006
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SIST EN ISO 8502-2:1999
3ULSUDYDMHNOHQLKSRGODJSUHGQDQDãDQMHPEDUYLQVRURGQLKL]GHONRY±3UHVNXVL
XJRWDYOMDQMDþLVWRVWLSRGODJH±GHO/DERUDWRULMVNRGRORþHYDQMHNORULGRYQD
RþLãþHQLKSRYUãLQDK,62
Preparation of steel substrates before application of paints and related products - Tests
for the assessment of surface cleanliness - Part 2: Laboratory determination of chloride
on cleaned surfaces (ISO 8502-2:2005)
Vorbereitung von Stahloberflächen vor dem Auftragen von Beschichtungsstoffen -
Prüfungen zum Beurteilen der Oberflächenreinheit - Teil 2: Laborbestimmung von
Chlorid auf gereinigten Oberflächen (ISO 8502-2:2005)
Préparation des subjectiles d'acier avant application de peintures et de produits
assimilés - Essais pour apprécier la propreté d'une surface - Partie 2: Recherche en
laboratoire des chlorures sur les surfaces nettoyées (ISO 8502-2:2005)
Ta slovenski standard je istoveten z: EN ISO 8502-2:2005
ICS:
25.220.10 Priprava površine Surface preparation
87.020 Postopki za nanašanje Paint coating processes
barvnih premazov
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 8502-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2005
ICS 25.220.10 Supersedes EN ISO 8502-2:1999
English Version
Preparation of steel substrates before application of paints and
related products - Tests for the assessment of surface
cleanliness - Part 2: Laboratory determination of chloride on
cleaned surfaces (ISO 8502-2:2005)
Préparation des subjectiles d'acier avant application de Vorbereitung von Stahloberflächen vor dem Auftragen von
peintures et de produits assimilés - Essais pour apprécier Beschichtungsstoffen - Prüfungen zur Beurteilen der
la propreté d'une surface - Partie 2: Recherche en Oberflächenreinheit - Teil 2: Laborbestimmung von Chlorid
laboratoire des chlorures sur les surfaces nettoyées (ISO auf gereinigten Oberflächen (ISO 8502-2:2005)
8502-2:2005)
This European Standard was approved by CEN on 8 August 2005.
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 Central Secretariat 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 Central Secretariat has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,
Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,
Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2005 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 8502-2:2005: E
worldwide for CEN national Members.

Foreword
This document (EN ISO 8502-2:2005) has been prepared by Technical Committee ISO/TC 35
"Paints and varnishes" in collaboration with Technical Committee CEN/TC 139 "Paints and
varnishes", the secretariat of which is held by DIN.

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 2006, and conflicting national
standards shall be withdrawn at the latest by April 2006.

This document supersedes EN ISO 8502-2:1999.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium,
Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary,
Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland,
Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Endorsement notice
The text of ISO 8502-2:2005 has been approved by CEN as EN ISO 8502-2:2005 without any
modifications.
INTERNATIONAL ISO
STANDARD 8502-2
Second edition
2005-10-15
Corrected version
2006-01-15
Preparation of steel substrates before
application of paints and related
products — Tests for the assessment of
surface cleanliness —
Part 2:
Laboratory determination of chloride on
cleaned surfaces
Préparation des subjectiles d'acier avant application de peintures et de
produits assimilés — Essais pour apprécier la propreté d'une surface —
Partie 2: Recherche en laboratoire des chlorures sur les surfaces
nettoyées
Reference number
ISO 8502-2:2005(E)
©
ISO 2005
ISO 8502-2:2005(E)
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ii © ISO 2005 – All rights reserved

ISO 8502-2:2005(E)
Contents Page
Foreword. iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Principle. 2
4 Reagents and materials . 2
5 Apparatus . 3
6 Procedure . 3
6.1 Blank titration. 3
6.2 Washing of the surface . 3
6.3 Wash-water titration . 4
7 Expression of results . 4
8 Test report . 5
Bibliography . 6

ISO 8502-2:2005(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.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 8502-2 was prepared by Technical Committee ISO/TC 35, Paints and varnishes, Subcommittee SC 12,
Preparation of steel substrates before application of paints and related products.
This second edition cancels and replaces the first edition (ISO 8502-2:1992), which has been technically
revised.
ISO 8502 consists of the following parts, under the general title Preparation of steel substrates before
application of paints and related products — Tests for the assessment of surface cleanliness:
 Part 1: Field test for soluble iron corrosion products (withdrawn) [Technical Report]
 Part 2: Laboratory determination of chloride on cleaned surfaces
 Part 3: Assessment of dust on steel surfaces prepared for painting (pressure-sensitive tape method)
 Part 4: Guidance on the estimation of the probability of condensation prior to paint application
 Part 5: Measurement of chloride on steel surfaces prepared for painting (ion detection tube method)
 Part 6: Extraction of soluble contaminants for analysis — The Bresle method
 Part 8: Field method for the refractometric determination of moisture
 Part 9: Field method for the conductometric determination of water-soluble salts
 Part 10: Field method for the titrimetric determination of water-soluble chloride (withdrawn)
 Part 11: Field method for the turbidimetric determination of water-soluble sulfate
 Part 12: Field method for the titrimetric determination of water-soluble ferrous ions
This corrected version of ISO 8502-2:2005 incorporates the following corrections:
 in 4.5 “0,012 5 mg/l” has been changed to “0,012 5 mol/l”;
−5 −2
 in 4.5.2 the numerator in the equation has been changed from “2,8 × 10 ” to “2,8 × 10 ” and the
volume unit has been added in the where clause, giving “V is the volume, in millilitres, of the
mercury(II) nitrate solution consumed.”
iv © ISO 2005 – All rights reserved

ISO 8502-2:2005(E)
Introduction
The performance of protective coatings of paint and related products applied to steel is significantly affected
by the state of the steel surface immediately prior to painting. The principal factors that are known to influence
this performance are
a) the presence of rust and mill scale,
b) the presence of surface contaminants, including salts, dust, oils and greases, and
c) the surface profile.
ISO 8501, ISO 8502 and ISO 8503 have been prepared to provide methods of assessing these factors, while
ISO 8504 provides guidance on the preparation methods that are available for cleaning steel substrates,
indicating the capabilities of each in attaining specified levels of cleanliness.
These International Standards do not contain recommendations for the protective coating systems to be
applied to the steel surface. Neither do they contain recommendations for the surface quality requirements for
specific situations even though surface quality can have a direct influence on the choice of protective coating
to be applied and on its performance. Such recommendations are found in other documents such as national
standards and codes of practice. It will be necessary for the users of these International Standards to ensure
that the qualities specified are
 compatible and appropriate both for the environmental conditions to which the steel will be exposed and
for the protective coating system to be used, and
 within the capability of the cleaning procedure specified.
The four International Standards referred to above deal with the following aspects of preparation of steel
substrates before application of paints and related products:
 ISO 8501 on visual assessment of surface cleanliness;
 ISO 8502 on tests for the assessment of surface cleanliness;
 ISO 8503 on surface roughness characteristics of blast-cleaned steel substrates;
 ISO 8504 on surface preparation methods.
Each of these International Standards is in turn divided into separate parts. This part of ISO 8502 describes a
method for the assessment of chloride-containing salts that are readily soluble in water and are present on a
steel surface. Rusted steel substrates, partic
...