ISO 4631:2023

Corrosion of metals and alloys — Measurement of the electrochemical critical localized corrosion potential (E-CLCP) for Ti alloys fabricated via additive manufacturing method in simulated biomedical solutions

This document specifies the procedures for testing the resistance to localized corrosion of biomedical Ti alloys fabricated via additive manufacturing (AM) method. This document defines the method of measuring the electrochemical critical localized corrosion potential (E-CLCP) of the AM Ti materials in aqueous environments, including biomedical solutions, for comparative evaluation of resistance to localized corrosion.

Titre manque

General Information

• Status: Published
• Publication Date: 06-Nov-2023
• ICS: 77.060 - Corrosion of metals
• Technical Committee: ISO/TC 156 - Corrosion of metals and alloys
• Drafting Committee: ISO/TC 156/WG 11 - Electrochemical test methods
• Current Stage: 6060 - International Standard published
• Start Date: 07-Nov-2023
• Due Date: 04-Jan-2024
• Completion Date: 07-Nov-2023

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 4631
First edition
2023-11
Corrosion of metals and alloys —
Measurement of the electrochemical
critical localized corrosion potential
(E-CLCP) for Ti alloys fabricated via
additive manufacturing method in
simulated biomedical solutions
Reference number
ISO 4631:2023(E)
© ISO 2023

---------------------- Page: 1 ----------------------
ISO 4631:2023(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: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
  © ISO 2023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 4631:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principles . 1
5 Apparatus . 3
5.1 Potentiostat . 3
5.2 Heating bath with temperature controller . 3
5.3 Specimen holder and connections . 3
5.4 Test cell . 4
5.5 Auxiliary electrode and reference electrode . 4
6 Test solutions . 4
7 Test specimen . 4
8 Procedure .5
8.1 Preparation of reference electrodes . 5
8.2 Preparation of biomedical AM Ti alloy specimen . 5
8.3 Preparation of solution . 5
8.4 Setting up the E-CLCP test .
...

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 4631
ISO/TC 156
Corrosion of metals and alloys —
Secretariat: SAC
Measurement of the electrochemical
Voting begins on:
2023-07-31 critical localized corrosion potential
(E-CLCP) for Ti alloys fabricated via
Voting terminates on:
2023-09-25
additive manufacturing method in
simulated biomedical solutions
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
Reference number
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO-
ISO/FDIS 4631:2023(E)
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. © ISO 2023

---------------------- Page: 1 ----------------------
ISO/FDIS 4631:2023(E)
FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 4631
ISO/TC 156
Corrosion of metals and alloys —
Secretariat: SAC
Measurement of the electrochemical
Voting begins on:
critical localized corrosion potential
(E-CLCP) for Ti alloys fabricated via
Voting terminates on:
additive manufacturing method in
simulated biomedical solutions
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.
RECIPIENTS OF THIS DRAFT ARE INVITED TO
ISO copyright office
SUBMIT, WITH THEIR COMMENTS, NOTIFICATION
OF ANY RELEVANT PATENT RIGHTS OF WHICH
CP 401 • Ch. de Blandonnet 8
THEY ARE AWARE AND TO PROVIDE SUPPOR TING
CH-1214 Vernier, Geneva
DOCUMENTATION.
Phone: [phone]
IN ADDITION TO THEIR EVALUATION AS
Reference number
Email: [e-mail]
BEING ACCEPTABLE FOR INDUSTRIAL, TECHNO­
ISO/FDIS 4631:2023(E)
Website: www.iso.org
LOGICAL, COMMERCIAL AND USER PURPOSES,
DRAFT INTERNATIONAL STANDARDS MAY ON
Published in Switzerland
OCCASION HAVE TO BE CONSIDERED IN THE
LIGHT OF THEIR POTENTIAL TO BECOME STAN­
DARDS TO WHICH REFERENCE MAY BE MADE IN
ii
  © ISO 2023 – All rights reserved
NATIONAL REGULATIONS. © ISO 2023

---------------------- Page: 2 ----------------------
ISO/FDIS 4631:2023(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principles . 1
5 Apparatus . 2
5.1 Potentiostat . 2
5.2 Heating bath with temperature controller . 3
5.3 Specimen holder and connections . 3
5.4 Test cell . 3
5.5 Auxilia
...

ISO/TC156 N7363
ISO/FDIS 4631
Date: 2023-05-09
ISO/TC 156/WG 11
Secretariat: SAC

Date: 2023-07-17
Corrosion of metals and alloys — Measurement of the
electrochemical critical localized corrosion potential (E-CLCP) for
Ti alloys fabricated via additive manufacturing method in
simulated biomedical solutions
Corrosion des métaux et alliages —
FDIS stage

---------------------- Page: 1 ----------------------
ISO/FDIS 4631:2023(E)
© 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
EmailE-mail: [e-mail]
Website: www.iso.orgwww.iso.org
Published in Switzerland
ii © ISO 2022 – All rights reserved
ii © ISO 2023 – All rights reserved

---------------------- Page: 2 ----------------------
ISO/FDIS 4631:2023(E)
Contents Page
Foreword . v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principles . 2
5 Apparatus . 3
5.1 Potentiostat . 3
5.2 Heating bath with temperature controller . 4
5.3 Specimen holder and connections . 4
5.4 Test cell . 5
5.5 Auxiliary electrode and reference electrode . 7
6 Test solutions. 7
7 Test specimen . 7
8 Procedure . 7
8.1 Preparation of reference electrodes . 7
8.2 Preparation of biomedical AM Ti alloy specimen . 7
8.3 Preparation of solution . 7
8.4 Setting up the E-CLCP test . 7
8.5 Ending test . 9
9 Examination and evaluation .
...