ISO/PAS 5929:2025
(Main)Corrosion of metals and alloys — Test and evaluation method for the corrosion of steel bar embedded in concrete structure exposed to total corrosion zones in marine environments
Corrosion of metals and alloys — Test and evaluation method for the corrosion of steel bar embedded in concrete structure exposed to total corrosion zones in marine environments
This document specifies the apparatus, materials, specimen preparation, procedures, results and reports for testing the corrosion test of steel bars. This document includes an evaluation method. This document applies to reinforced concrete structures exposed simultaneously to atmospheric, splash, tidal, immersion, and buried zones in marine environments. NOTE Annex A provides test apparatus examples. Annex B illustrates test results.
Corrosion des métaux et alliages — Méthode d'essai et d'évaluation de la corrosion des barres en acier encastrées dans des structures en béton exposées à des zones de corrosion totale dans des environnements marins
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Specification
ISO/PAS 5929
First edition
Corrosion of metals and alloys —
2025-08
Test and evaluation method for the
corrosion of steel bar embedded
in concrete structure exposed to
total corrosion zones in marine
environments
Corrosion des métaux et alliages — Méthode d'essai et
d'évaluation de la corrosion des barres en acier encastrées dans
des structures en béton exposées à des zones de corrosion totale
dans des environnements marins
Reference number
© ISO 2025
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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Apparatus . 2
4.1 Simulated marine environmental chamber .2
4.2 Environmental parameter control chamber .2
4.3 Atmospheric zone: Spraying device .2
4.4 Splash zone: Splashing device .3
4.5 Tidal zone: Tidal device .3
4.6 Immersion zone .3
4.7 Buried zone .3
5 Test materials . 4
5.1 Steel bar .4
5.2 Concrete .4
5.3 Industrial salt .4
5.4 Water .5
5.5 Chloride concentration and salt solution temperature .5
6 Preparation of specimens . 5
6.1 Rust removal of steel bar.5
6.2 Making concrete specimens .5
7 Test procedure . 6
7.1 Specimen placement .6
7.2 Maintenance .7
8 Measurement . 7
8.1 Initial performance measurement .7
8.1.1 Mechanical properties and chemical compositions of steel bars .7
8.1.2 Dimensions .7
8.1.3 3D scan model .7
8.1.4 Mass .7
8.1.5 Concrete strength . .7
8.1.6 Chlorine ion concentration .7
8.2 Periodic measurement .8
8.2.1 General .8
8.2.2 Measurement time .8
8.2.3 Mechanical properties and chemical compositions of steel bars .8
8.2.4 Dimensions .8
8.2.5 3D scan measurement .9
8.2.6 Mass .9
8.2.7 Chlorine ion concentration .9
9 Results . . 9
10 Evaluation . 9
11 Test report . 10
Annex A (informative) Example of test apparatus .11
Annex B (informative) Example of test results . 19
iii
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 156, Corrosion of metals and alloys.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
Introduction
Reinforced concrete structures worldwide face increasing durability deterioration, primarily driven by
environmental factors. In the marine environment, chloride-induced steel corrosion causes significant
structural damage. This phenomenon occurs across multiple exposure zones defined by elevation:
atmospheric, splash, tidal, immersion, and buried zones. Coastal infrastructure (e.g. docks, bridges, piers)
typically spans several such zones simultaneously.
Existing corrosion testing methods focus on single-directional chloride penetration within isolated zones
like the splash zone. While moisture fluctuations here accelerate corrosion, such unidirectional models
fail to replicate real-world multi-zone interactions. This oversight leads to incomplete corrosion resistance
assessments during material selection.
This document establishes a testing methodology that vertically and horizontally simulates chloride
migration along steel bars. By simulating worst-case conditions in all corrosion zones, the method facilitates
accurate corrosion distribution mapping (particularly chloride ingress), data-driven material selection for
extended service life, cost-effective design that avoids overprotection (e.g. excessive component thickness)
and accurate protection and repair along the length of concrete piers and columns. 3D scanning supplements
traditional measurements and enables non-destr
...
FINAL DRAFT
Publicly
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Specification
ISO/DPAS 5929
ISO/TC 156
Corrosion of metals and alloys —
Secretariat: SAC
Test and evaluation method for the
Voting begins on:
corrosion of steel bar embedded
2025-05-07
in concrete structure exposed to
Voting terminates on:
total corrosion zones in marine
2025-07-02
environments
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
Reference number
ISO/DPAS 5929:2025(en) © ISO 2025
FINAL DRAFT
ISO/DPAS 5929:2025(en)
Publicly
Available
Specification
ISO/DPAS 5929
ISO/TC 156
Corrosion of metals and alloys —
Secretariat: SAC
Test and evaluation method for the
Voting begins on:
corrosion of steel bar embedded
in concrete structure exposed to
Voting terminates on:
total corrosion zones in marine
environments
RECIPIENTS OF THIS DRAFT ARE INVITED TO SUBMIT,
WITH THEIR COMMENTS, NOTIFICATION OF ANY
RELEVANT PATENT RIGHTS OF WHICH THEY ARE AWARE
AND TO PROVIDE SUPPOR TING DOCUMENTATION.
© ISO 2025
IN ADDITION TO THEIR EVALUATION AS
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO
LOGICAL, COMMERCIAL AND USER PURPOSES, DRAFT
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
INTERNATIONAL STANDARDS MAY ON OCCASION HAVE
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
TO BE CONSIDERED IN THE LIGHT OF THEIR POTENTIAL
or ISO’s member body in the country of the requester.
TO BECOME STAN DARDS TO WHICH REFERENCE MAY BE
MADE IN NATIONAL REGULATIONS.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland Reference number
ISO/DPAS 5929:2025(en) © ISO 2025
ii
ISO/DPAS 5929:2025(en)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Apparatus . 2
4.1 Simulated marine environmental chamber .2
4.2 Environmental parameter control chamber .2
4.3 Atmospheric zone: Spraying device .2
4.4 Splash zone: Splashing device .3
4.5 Tidal zone: Tidal device .3
4.6 Immersion zone .3
4.7 Buried zone .3
5 Test materials . 4
5.1 Steel bar .4
5.2 Concrete .4
5.3 Industrial salt .4
5.4 Water .5
5.5 Chloride concentration and salt solution temperature .5
6 Preparation of specimens . 5
6.1 Rust removal of steel bar.5
6.2 Making concrete specimens .5
7 Test procedure . 6
7.1 Specimen placement .6
7.2 Maintenance .7
8 Measurement . 7
8.1 Initial performance measurement .7
8.1.1 Mechanical properties and chemical compositions of steel bars .7
8.1.2 Dimensions .7
8.1.3 3D scan model .7
8.1.4 Mass .7
8.1.5 Concrete strength . .7
8.1.6 Chlorine ion concentration .7
8.2 Periodic measurement .8
8.2.1 General .8
8.2.2 Measurement time .8
8.2.3 Mechanical properties and chemical compositions of steel bars .8
8.2.4 Dimensions .8
8.2.5 3D scan measurement .9
8.2.6 Mass .9
8.2.7 Chlorine ion concentration .9
9 Results . . 9
10 Evaluation . 9
11 Test report . 10
Annex A (informative) Example of test apparatus .11
Annex B (informative) Example of test results . 19
iii
ISO/DPAS 5929:2025(en)
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 document 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).
ISO draws attention to the possibility that the implementation of this document may involve the use of (a)
patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed patent
rights in respect thereof. As of the date of publication of this document, ISO had not received notice of (a)
patent(s) which may be required to implement this document. However, implementers are cautioned that
this may not represent the latest information, which may be obtained from the patent database available at
www.iso.org/patents. ISO shall not be held responsible for identifying any or all such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and expressions
related to conformity assessment, as well as information about ISO's adherence to the World Trade
Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 156, Corrosion of metals and alloys.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
iv
ISO/DPAS 5929:2025(en)
Introduction
Reinforced concrete structures worldwide face increasing durability deterioration, primarily driven by
environmental factors. In the marine environment, chloride-induced steel corrosion causes significant
structur
...
© ISO #### – All rights reserved
ISO /TC 156 N7740
ISO /DPAS 5929
Date：2025-02-24
Committee identification: ISO/TC 156/WG 15
Secretariat: SAC
Date: 2025-04-22
Corrosion of metals and alloys - — Test and evaluation method for
the corrosion of steel bar embedded in concrete structure
exposed to total corrosion zones in marine environments
DPAS stage
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ISO #####-#:####(X)
2 © ISO #### – All rights reserved
ISO/DPAS 5929:(en)
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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: + 41 22 749 01 11
EmailE-mail: copyright@iso.org
Website: www.iso.orgwww.iso.org
Published in Switzerland
© ISO #### 2025 – All rights reserved
iii
ISO/DPAS 5929:(en)
Contents
Foreword . vi
Introduction . vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Apparatus . 2
4.1 Simulated marine environmental chamber . 2
4.2 Environmental parameter control chamber . 2
4.3 Atmospheric zone: Spraying device . 2
4.4 Splash zone: Splashing device . 3
4.5 Tidal zone: Tidal device . 3
4.6 Immersion zone . 4
4.7 Buried zone . 4
5 Test materials . 5
5.1 Steel bar . 5
5.2 Concrete . 5
5.3 Industrial salt . 6
5.4 Water . 6
5.5 Chloride concentration and salt solution temperature . 6
6 Preparation of specimens . 6
6.1 Rust removal of steel bar . 6
6.2 Making concrete specimens . 6
7 Test procedure . 8
7.1 Specimen placement . 8
7.2 Maintenance . 9
8 Measurement . 9
8.1 Initial performance measurement . 9
8.2 Periodic measurement . 10
9 Results . 11
10 Evaluation . 12
11 Test report . 12
Annex A (informative) Example of test apparatus. 14
Annex B (informative) Example of test results . 31
Foreword . v
Introduction . vi
1 Scope (mandatory) . 1
2 Normative references (mandatory) . 1
3 Terms and definitions (mandatory) . 1
3.1 simulated marine environmental chamber . 2
3.2 environmental parameter control chamber. 2
4 Apparatus . 2
iv © ISO #### 2025 – All rights reserved
iv
ISO/DPAS 5929:(en)
4.1 Simulated marine environmental chamber . 2
4.2 Environmental parameter control chamber . 2
4.3 Atmospheric zone: Spraying device . 2
4.4 Splash zone: Splashing device . 3
4.5 Tidal zone: Tidal device . 3
4.6 Immersion zone . 3
4.7 Buried zone . 3
5 Test materials . 4
5.1 Steel bar . 4
5.2 Concrete . 4
5.3 Industrial salt . 5
5.4 Water . 5
5.5 Chloride concentration and salt solution temperature . 5
6 Preparation of specimens . 5
6.1 Rust removal of steel bar . 5
6.2 Making concrete specimens . 5
7 Test procedure . 6
7.1 Specimen placement . 6
7.2 Maintenance . 6
8 Measurement . 6
8.1 Initial performance measurement . 6
8.1.1 Mechanical properties and chemical compositions of steel bars . 6
8.1.2 Dimensions . 6
8.1.3 3D scan model. 7
8.1.4 Mass . 7
8.1.5 Concrete strength . 7
8.1.6 Chlorine ion concentration . 7
8.2 Periodic measurement . 7
8.2.1 General . 7
8.2.2 Measurement time . 7
8.2.3 Mechanical properties and chemical compositions of steel bars . 8
8.2.4 Dimensions . 8
8.2.5 3D scan measurement . 8
8.2.6 Mass . 8
8.2.7 Chlorine ion concentration . 8
9 Results . 8
10 Evaluation . 9
11 Test report . 9
Annex A (informative) Example of test apparatus. 11
Annex B (informative) Example of test results . 19
© ISO #### 2025 – All rights reserved
v
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