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GB/T 13671-2025: Electrochemical test method for crevice corrosion of stainless steel
Status: Valid GB/T 13671: Evolution and historical versions
| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivered in | Standard Title (Description) | Status | PDF |
| GB/T 13671-2025 | English | 299 |
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Electrochemical test method for crevice corrosion of stainless steel
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GB/T 13671-2025
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| GB/T 13671-1992 | English | 249 |
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Stainless steels. Method of electrochemical test for crevice corrosion
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GB/T 13671-1992
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PDF similar to GB/T 13671-2025
Basic data | Standard ID | GB/T 13671-2025 (GB/T13671-2025) | | Description (Translated English) | Electrochemical test method for crevice corrosion of stainless steel | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H20 | | Classification of International Standard | 47.020.05 | | Word Count Estimation | 14,194 | | Date of Issue | 2025-04-25 | | Date of Implementation | 2025-08-01 | | Older Standard (superseded by this standard) | GB/T 13671-1992 | | Issuing agency(ies) | State Administration for Market Regulation, China National Standardization Administration | GB/T 13671-2025: Electrochemical test method for crevice corrosion of stainless steel---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 47.020.05
CCSH20
National Standard of the People's Republic of China
Replace GB/T 13671-1992
Electrochemical test method for crevice corrosion of stainless steel
Released on 2025-04-25
2025-08-01 Implementation
State Administration for Market Regulation
The National Standardization Administration issued
Table of contents
Preface III
1 Scope 1
2 Normative references 1
3 Terms and Definitions 1
4 Principle 2
5 Test instruments 2
6 Sample preparation 2
7 Test conditions 3
8 Test Step 3
9 Test Report 6
Appendix A (Informative) Artificial Gap Fixture 7
Foreword
This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1.Structure and drafting rules for standardization documents"
Drafting.
This document replaces GB/T 13671-1992 "Electrochemical Test Method for Crevice Corrosion of Stainless Steels". Compared with GB/T 13671-1992,
In addition to structural adjustments and editorial changes, the main technical changes are as follows.
a) The scope of application has been changed (see Chapter 1, Chapter 1 of the.1992 edition);
b) Added the terms and definitions of "pitting potential", "pre-passivation potential", "induced crevice corrosion potential" and "crevice corrosion repassivation potential"
(see 3.1~3.4);
c) The principle of the test method has been changed (see Chapter 4, Chapter 3 of the.1992 edition);
d) The technical requirements for test instruments have been changed (see Chapter 5, Chapter 4 of the.1992 edition);
e) The requirements for specimen size have been changed (see 6.1, 5.1 of the.1992 edition) and the wire connection method of the specimen has been changed (see 6.6,
Version 5.6);
f) Added the provision that test solutions of other concentrations and temperatures can be used according to customer requirements (see 7.1);
g) Added the measurement of pitting potential (see 8.1);
h) The torque value of the tightening fixture for assembling the gap specimen is increased (see 8.3);
i) The selection criteria for induced crevice corrosion potential, description of induced crevice corrosion, current density-time curve and Figure 4 (see 8.5,
7.5 of the.1992 edition);
j) The description of the repassivation of crevice corrosion specimens and the current density-time curve have been changed (see 8.6, 7.6 of the.1992 edition);
k) The selection criteria for the potential for re-inducing crevice corrosion have been changed (see 8.7, 7.7 of the.1992 edition);
l) The selection criteria for the pre-selected passivation potential have been changed (see 8.8, 7.8 of the.1992 edition);
m) Changed the record of sample information in the test report, and added information about test conditions and pitting corrosion potential.
bits of records (see Chapter 9, Chapter 8 of the.1992 edition).
Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.
This document was proposed and coordinated by the National Technical Committee for Standardization of Marine Vessels (SAC/TC12).
This document was drafted by. Luoyang Ship Material Research Institute (China Shipbuilding Industry Corporation 725 Research Institute), China Classification Society Wuhan
Branch.
The main drafters of this document are. Zhang Huixia, Liu Xuehui, Luo Xing, Hao Fuyao, Chen Chen, Hu Hongwei, Sui Yongqiang, Li Xiangbo, Hou Jian, Xu Likun,
Xing Shaohua and Zheng Guohua.
This document was first published in.1992 and this is the first revision.
Electrochemical test method for crevice corrosion of stainless steel
1 Scope
This document describes the principle of the electrochemical test method for crevice corrosion of stainless steel and specifies the test instrument, sample preparation, test conditions, test
Steps and test report contents.
This document is applicable to the evaluation of the crevice corrosion resistance of stainless steel in chloride environments, especially for different grades or different surface conditions.
This document is also applicable to the evaluation of the crevice corrosion resistance of stainless steel and other passive metal materials for human surgical implants.
2 Normative references
The contents of the following documents constitute essential clauses of this document through normative references in this document.
For referenced documents without a date, only the version corresponding to that date applies to this document; for referenced documents without a date, the latest version (including all amendments) applies to
This document.
GB/T 626 Chemical reagent nitric acid
GB/T 1266 Chemical reagent sodium chloride
GB/T 10123 Corrosion terminology for metals and alloys
GB/T 17899-2023 Corrosion of metals and alloys - Potentiodynamic method for measuring the pitting potential of stainless steel in sodium chloride solution
3 Terms and definitions
The terms and definitions defined in GB/T 10123 and the following apply to this document.
3.1
Pitting potential
Eb100
The electrode potential value that can cause pitting corrosion on the stainless steel surface when the current density is 100μA/cm2.
3.2
The preset electrode potential value at which stainless steel can be passivated.
Note. i is a natural number.
3.3
Eic
The electrode potential that can induce crevice corrosion of stainless steel.
Note. The induced crevice corrosion potential is not negative to the pitting corrosion potential.
3.4
Erp
The most positive potential for stainless steel to undergo crevice corrosion and then passivate.
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