prEN ISO 8502-12
(Main)Preparation of steel substrates before application of paints and related products - Tests for the assessment of surface cleanliness - Part 12: Field method for the titrimetric determination of water-soluble ferrous ions (ISO/DIS 8502-12:2013)
Preparation of steel substrates before application of paints and related products - Tests for the assessment of surface cleanliness - Part 12: Field method for the titrimetric determination of water-soluble ferrous ions (ISO/DIS 8502-12:2013)
2015-12-16: WI cancelled following cancellation of equivalent ISO WI (ISO notification in dataservice on 2015-12-16).
Vorbereitung von Stahloberflächen vor dem Auftragen von Beschichtungsstoffen - Prüfungen zum Beurteilen der Oberflächenreinheit - Teil 12: Feldprüfung zur titrimetrischen Bestimmung von wasserlöslichen Eisenionen (ISO/DIS 8502-12:2013)
Dieser Teil von ISO 8502 beschreibt ein Feldverfahren zum Bestimmen von löslichen Eisen(II)-Ionen durch Tropftitration auf Stahloberflächen vor und/oder nach der Oberflächenvorbereitung.
Das Verfahren ist hauptsächlich zum Bewerten von Verunreinigungen auf einer Oberfläche gedacht. Es ist von ungeübtem Personal leicht durchzuführen und für die meisten praktischen Zwecke ausreichend genau.
Préparation des subjectiles d'acier avant application de peintures et de produits assimilés - Essais pour apprécier la propreté d'une surface - Partie 12: Méthode in situ pour la détermination titrimétrique des ions ferreux hydrosolubles (ISO/DIS 8502-12:2013)
Priprava jeklenih podlag pred nanašanjem barv in sorodnih premazov - Preskusi za ocenjevanje čistosti površine - 12. del: Terenska metoda za titrimetrijsko določevanje vodotopnih železovih ionov (ISO/DIS 8502-12:2013)
General Information
- Status
- Not Published
- Publication Date
- 12-Jul-2015
- Withdrawal Date
- 12-Jan-2016
- Technical Committee
- CEN/TC 139 - Paints and varnishes
- Drafting Committee
- CEN/TC 139 - Paints and varnishes
- Current Stage
- 4098 - Decision to abandon - Enquiry
- Start Date
- 16-Dec-2015
- Completion Date
- 11-Feb-2026
Relations
- Effective Date
- 23-Jul-2011
Overview
prEN ISO 8502-12 (ISO/DIS 8502-12:2013) specifies a field titrimetric method for the determination of water‑soluble ferrous ions on steel surfaces prior to painting. The method is designed for on‑site assessment of surface cleanliness following contaminant extraction (typically the Bresle method, ISO 8502‑6). Note: the CEN work item was cancelled on 2015‑12‑16 following cancellation of the equivalent ISO work item.
Key topics and requirements
- Purpose: Rapid field test to quantify soluble Fe2+ that can affect coating performance. Intended to be simple enough for unskilled personnel while providing practical accuracy.
- Principle: Extract soluble contaminants in water (Bresle patch or other extraction), acidify the extract with phosphoric acid, add sodium diphenylamine sulfonate indicator, and perform a drop titration with potassium dichromate (K2Cr2O7). Reaction: Cr2O7 2– + 6Fe2+ + 14H+ → 2Cr3+ + 6Fe3+ + 7H2O.
- Reagents (as specified):
- Phosphoric acid solution (85 % diluted 1:2 by volume)
- Indicator: 0.5 % sodium diphenylamine sulfonate solution
- Titrant: K2Cr2O7, c = 0.002 mol·L‑1
- Use water conforming to ISO 3696 (grade 3 or better)
- Apparatus: Small plastic beaker and two dropper bottles calibrated to ~0.050 ml per drop for indicator and titrant.
- Procedure highlights:
- Collect extract (Bresle A‑1250 patch commonly used).
- Add indicator, acidify, apply one titrant drop as blank, then titrate dropwise until colour shifts from colourless → greyish blue → violet.
- Record number of drops (excluding blank).
- Result expression: For A‑1250 patches the conversion factor is 27 mg/m2 per drop; results are reported as a surface density range (mg/m2). Multiply/divide if a different patch area is used.
- Precision: Method precision is stated as independent of ferrous ion surface density.
Applications and users
- Practical for surface cleanliness testing before application of paints and protective coatings.
- Typical users:
- Coating inspectors and contractors
- Quality assurance teams in shipyards, bridges, industrial plants
- Corrosion engineers and maintenance planners
- On‑site laboratories performing pre‑coating acceptance tests
- Use cases: spot checks after surface preparation, troubleshooting coating failures, confirming cleaning procedures.
Related standards
- ISO 8502 series (surface cleanliness): notably ISO 8502‑6 (Bresle method), ISO 8502‑2, ‑3, ‑8, ‑9, ‑11
- ISO 8501 (visual assessment), ISO 8503 (surface roughness), ISO 8504 (preparation methods)
Keywords: ISO 8502‑12, surface cleanliness, titrimetric determination, ferrous ions, Bresle method, steel substrate preparation, field method, paint coating processes.
Get Certified
Connect with accredited certification bodies for this standard
National Aerospace and Defense Contractors Accreditation Program (NADCAP)
Global cooperative program for special process quality in aerospace.
CARES (UK Certification Authority for Reinforcing Steels)
UK certification for reinforcing steels and construction.
DVS-ZERT GmbH
German welding certification society.
Sponsored listings
Frequently Asked Questions
prEN ISO 8502-12 is a draft published by the European Committee for Standardization (CEN). Its full title is "Preparation of steel substrates before application of paints and related products - Tests for the assessment of surface cleanliness - Part 12: Field method for the titrimetric determination of water-soluble ferrous ions (ISO/DIS 8502-12:2013)". This standard covers: 2015-12-16: WI cancelled following cancellation of equivalent ISO WI (ISO notification in dataservice on 2015-12-16).
2015-12-16: WI cancelled following cancellation of equivalent ISO WI (ISO notification in dataservice on 2015-12-16).
prEN ISO 8502-12 is classified under the following ICS (International Classification for Standards) categories: 25.220.10 - Surface preparation. The ICS classification helps identify the subject area and facilitates finding related standards.
prEN ISO 8502-12 has the following relationships with other standards: It is inter standard links to EN ISO 8502-12:2004. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.
prEN ISO 8502-12 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.
Standards Content (Sample)
SLOVENSKI STANDARD
01-februar-2014
3ULSUDYDMHNOHQLKSRGODJSUHGQDQDãDQMHPEDUYLQVRURGQLKSUHPD]RY3UHVNXVL
]DRFHQMHYDQMHþLVWRVWLSRYUãLQHGHO 7HUHQVNDPHWRGD]DWLWULPHWULMVNR
GRORþHYDQMHYRGRWRSQLKåHOH]RYLKLRQRY ,62',6
Preparation of steel substrates before application of paints and related products - Tests
for the assessment of surface cleanliness - Part 12: Field method for the titrimetric
determination of water-soluble ferrous ions (ISO/DIS 8502-12:2013)
Vorbereitung von Stahloberflächen vor dem Auftragen von Beschichtungsstoffen -
Prüfungen zum Beurteilen der Oberflächenreinheit - Teil 12: Feldprüfung zur
titrimetrischen Bestimmung von wasserlöslichen Eisenionen (ISO/DIS 8502-12:2013)
Préparation des subjectiles d'acier avant application de peintures et de produits
assimilés - Essais pour apprécier la propreté d'une surface - Partie 12: Méthode in situ
pour la détermination titrimétrique des ions ferreux hydrosolubles (ISO/DIS 8502-
12:2013)
Ta slovenski standard je istoveten z: prEN ISO 8502-12
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.
����������������������������
ISO/DIS 8502-12
ISO/TC 35/SC 12 Secretariat: BSI
��ti������i�s���:� ��ti���t�r�i��t�s���:
2013-10-03 2014-03-03
Preparation of steel substrates before application of paints
and related products — Tests for the assessment of surface
cleanliness —
Part 12:
Field method for the titrimetric determination of water-
soluble ferrous ions
Préparation des subjectiles d’acier avant application de peintures et de produits assimilés — Essais pour
apprécier la propreté d’une surface —
Partie 12: Méthode in situ pour la détermination titrimétrique des ions ferreux hydrosolubles
[Revision of first edition (ISO 8502-12:2003)]
���:�25�220�10
ISO/CEN PARALLEL PROCESSING
This draft has been developed within the International Organization for
Standardization (ISO), and processed under the ISO lead mode of collaboration
�s����i����i��t����i�������r�����t�
This draft is hereby submitted to the ISO member bodies and to the CEN member
���i�s�f�r�����r�������i������t������ir��
�������t�is��r�ft���������t�������i�����r�ft���st���is�������t�����sis��f�������ts�
received, will be submitted to a parallel two-month approval vote in ISO and
����� ��������� ��� �� ������ �����������
f�r������t��i������
���� �������� ���� ���������� ��� ���
������������������������������������
���������������������������������������
���������������������������������
To expedite distribution, this document is circulated as received from the
��� ��������� ��� ������ ����������� ���
����itt��� s��r�t�ri�t�� ���� ���tr��� ���r�t�ri�t� ��r�� �f� ��iti��� ���� t��t�
������ ����������� ���� ������������
�����siti����i����������rt������t�����i��ti���st����
��������������� ����������� ����
����� ���������� ������ ��������������
���������� ���� ��� ��������� ����� ���
��� ����������� ��� ���� ������ ��� ������
���������� ��� ������� ���������� ���
������ ���������� ���� ��� ����� ���
Reference number
���������������������
ISO/DIS 8502-12:2013(E)
����������� ��� ����� ������ ���� ��������
��� �������� ����� ������ ����������
������������� ��� ���� ��������� �������
��������������������������������������
©
��������������������������������� ISO 2013
ISO/DIS 8502-12:2013(E)
Copyright notice
��is������������t�is����r�ft���t�r��ti������t����r������is�����ri��t-�r�t��t����������������t��s�
permitted under the applicable laws of the user’s country, neither this ISO draft nor any extract
from it may be reproduced, stored in a retrieval system or transmitted in any form or by any means,
����tr��i������t�����i����r���r�i����r��t��r�is����it���t��ri�r��ritt�����r�issi�����i���s���r���
�����sts�f�r���r�issi���t��r��r������s������������r�ss���t���it��r������t�t������r�ss��������r�����s�
�����r������i��t�������tr���f�t���r����st�r�
��������ri��t��f�i��
��s����st����5������-1211��������20
���������1�22�����01�11
��������1�22�����0����
�-��i�������ri��t�is���r�
���������is���r�
���r����ti����������s�����t�t��r����t��������ts��r����i���si�����r�����t�
�i���t�rs���������r�s���t���
ii ������2013�������ri��ts�r�s�r���
ISO/DIS 8502-12
Contents Page
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Principle . 1
4 Reagents . 1
5 Apparatus . 2
6 Removal of water-soluble contaminants from the surface . 2
7 Procedure . 2
8 Expression of results . 3
9 Precision . 3
10 Test report . 3
ISO/DIS 8502-12
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 8502-12 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 edition cancels and replaces ISO 8502-12:2003, 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
iv © ISO 2013 – All rights reserved
ISO/DIS 8502-12
Introduction
The performance of protective coatings of paint and related products appl
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.
Loading comments...