ISO 8057:2024
(Main)Determination of galvanic corrosion rate for assembled forms of carbon fibre reinforced plastics (CFRPs) and protection-coated metal — Electrochemical tests in neutral sodium chloride solution
Determination of galvanic corrosion rate for assembled forms of carbon fibre reinforced plastics (CFRPs) and protection-coated metal — Electrochemical tests in neutral sodium chloride solution
This document specifies the electrochemical test for determining galvanic corrosion rate of CFRPs and metal assemblies with protection-coating, subjected to the corrosive environment of electrolyte diffusion through the coating. It specifies the apparatus, the test solutions, and the procedure to be used in conducting the electrochemical tests for a) the assessment of the Fick's diffusion parameter for protective coating on metallic materials, and b) the estimation of the galvanic corrosion rates with the conversion of ISO 21746 coating-free sample data. The following are intended situations of implementing an electrochemical test based on this document: a) when interested parties estimate the galvanic corrosion rate of bonded joints relating engineering metals with protection-coating and CFRPs of the potential drastically nobler than those of most metals, utilizing the resources of ISO 17475; b) when expanding CFRP-metal bonded joints applications using coatings to the fields of corrosion-sensitive environments caused by electrolytes. It is not the intent of this document to fulfil the need for: — omitting relevant field tests for the applications in corrosive environment; — superimposing test data for specific applications for the range of relevant data; — comparative testing as a means of ranking different protections with respect to corrosion rates; — ignoring the field hazards such as erosion, abrasion, and ultraviolet irradiation.
Détermination du taux de corrosion galvanique pour les formes assemblées de plastiques renforcés de fibres de carbone (CFRP) et de métal revêtu de protection — Essais électrochimiques en solution neutre de chlorure de sodium
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INTERNATIONAL ISO
STANDARD 8057
First edition
Determination of galvanic corrosion
rate for assembled forms of carbon
fibre reinforced plastics (CFRPs)
and protection-coated metal —
Electrochemical tests in neutral
sodium chloride solution
Détermination du taux de corrosion galvanique pour les formes
assemblées de plastiques renforcés de fibres de carbone (CFRP) et
de métal revêtu de protection — Essais électrochimiques en solution
neutre de chlorure de sodium
PROOF/ÉPREUVE
Reference number
ISO 8057:2023(E)
© ISO 2023
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ISO 8057:2023(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2023
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
PROOF/ÉPREUVE © ISO 2023 – All rights reserved
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ISO 8057:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols . 2
5 Principle . 3
5.1 General . 3
5.2 Capacitor model . 3
5.3 Fick’s diffusion coefficient for thin coating layer . 4
5.4 Corrosion rate estimation . 6
6 Test solutions . 7
7 Apparatus . 8
7.1 Potentio/Galvanostat . 8
7.2 Test cell . 8
8 Test specimen preparation . 9
9 Test procedure .9
9.1 Fick’s diffusion parameter — Setups . 9
9.2 Fick’s diffu
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ISO/DISPRF 8057:2023(E)
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ISO /TC 61/SC 13/WG 7
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Gutter: 0 cm, Section start: New page, Header distance
Date: 2023-06-19
from edge: 1.27 cm, Footer distance from edge: 1.27
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Secretariat: JISC
Formatted: Font: 14 pt, Bold, Font color: Auto
Date: 2023-12-05
Formatted: zzCover large
Formatted
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Formatted: Cover Title_A1
Determination of galvanic corrosion rate for assembled forms of
carbon fibre reinforced plastics (CFRPs) and protection-coated
metal — Electrochemical tests in neutral sodium chloride
solution
Détermination du taux de corrosion galvanique pour les formes assemblées de plastiques renforcés de
fibres de carbone (CFRP) et de métal revêtu de protection — Essais électrochimiques en solution neutre de
chlorure de sodium
PROOF
---------------------- Page: 1 ----------------------
ISO/PRF 8057:2023(E)
© ISO 2023
Formatted: Default Paragraph Font
Formatted: Adjust space between Latin and Asian text,
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this
Adjust space between Asian text and numbers
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
Formatted: Default Paragraph Font
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
Formatted: French (Switzerland)
EmailE-mail: copyright@iso.org
Formatted: French (Switzerland)
Website: www.iso.orgwww.iso.org
Formatted: French (Switzerland)
Published in Switzerland
ii © ISO 2023 – All rights reserved
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ISO/PRF 8057:2023(E)
© ISO 2023 – All rights reserved iii
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ISO/PRF 8057:2023(E)
Formatted: zzContents
Contents
Formatted: Font: Cambria, English (United Kingdom)
Foreword vi
Formatted: Font: Bold
1 Scope 1
2 Normative references 1
3 Terms and definitions 2
4 Symbols 2
5 Principle 3
5.1 General 3
5.2 Capacitor model 4
5.3 Fick’s diffusion coefficient for thin coating layer 5
5.4 Corrosion rate estimation 8
6 Test solutions 9
7 Apparatus 10
7.1 Potentio/Galvanostat 10
7.2 Test cell 10
8 Test specimen preparation 12
9 Test procedure 14
9.1 Fick’s diffusion parameter: Setups 14
9.2 Fick’s diffusion parameter: Calculation 14
9.3 Corrosion rate estimation 16
10 Test report 16
Annex A (informative) Example of measurement for Fick’s diffusion parameter 18
A.1 Sample materials and test setup 18
A.2 Measurement results 20
Foreword . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Symbols. 2
5 Principle . 3
5.1 General. 3
5.2 Capacitor model . 4
5.3 Fick’s diffusion coefficient for thin coating layer . 5
5.4 Corrosion rate estimation . 8
6 Test solutions . 9
7 Apparatus . 10
7.1 Potentio/Galvanostat . 10
7.2 Test cell .
...
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