GB/T 2423.18-2021 PDF English
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Environmental testing - Part 2: Test methods - Test Kb: Salt mist, cyclic (sodium chloride solution)
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| GB/T 2423.18-2012 | English | 95 |
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Environmental testing - Part 2: Test methods - Test Kb: Salt mist, cyclic (sodium chloride solution)
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| GB/T 2423.18-2000 | English | 235 |
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Environmental testing for electric and electronic products - Part 2: Tests - Test Kb: Salt spray, alternating (sodium chloride solution)
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Basic environmental testing procedures for electric and electronic products - Test Kb: salt mist, cyclic (sodium chloride solution)
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GB/T 2423.18-2021: Environmental testing - Part 2: Test methods - Test Kb: Salt mist, cyclic (sodium chloride solution)
---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT2423.18-2021
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 19.040
CCS K 04
GB/T 2423.18-2021 / IEC 60068-2-52.2017
Replacing GB/T 2423.18-2012
Environmental testing - Part 2.Test methods -
Test Kb. Salt mist, cyclic (sodium chloride solution)
[IEC 60068-2-52.2017, Environmental testing - Part 2-52.Tests -
Test Kb. Salt mist, cyclic (sodium chloride solution), IDT]
Issued on. MAY 21, 2021
Implemented on. DECEMBER 01, 2021
Issued by. State Administration for Market Regulation;
Standardization Administration of the PRC.
Table of Contents
Foreword... 3
Introduction... 5
1 Scope... 7
2 Normative references... 7
3 Terms and definitions... 7
4 General description of the test... 8
5 Test apparatus... 9
6 Salt solution... 9
7 Initial measurements... 10
8 Preconditioning... 10
9 Testing... 10
10 Recovery (at the end of testing)... 15
11 Final measurements... 15
12 Information to be given in the relevant specification... 15
13 Information to be given in the test report... 15
Annex A (Informative) Typical apparatus for cyclic salt mist, humid condition,
dry condition and standard atmosphere corrosion tests... 17
Annex B (Informative) Description of each test method... 18
Annex NA (Informative) Constituent documents of GB/T 2423... 20
Bibliography... 24
Figure A.1 -- Schematic diagram of test apparatus... 17
Table 1 -- Test cycles for test methods 1 to 8... 14
Foreword
This document is drafted in accordance with GB/T 1.1-2020 "Directives for
standardization - Part 1.Rules for the structure and drafting of standardizing
documents".
This document is Part 18 of GB/T 2423.For the issued parts of GB/T 2423, see
Annex NA.
This document replaces GB/T 2423.18-2012 "Environmental testing - Part 2.
Test methods - Test Kb. Salt mist, cyclic (sodium chloride solution)". Compared
with GB/T 2423.18-2012, in addition to structural adjustment and editorial
changes, the main technical changes are as follows.
a) Add a description of the effect of test conditions on the specimens (see
Clause 4);
b) Add the cycle process of test methods 7 and 8 (see Clause 9);
c) Modify Figure 1;
d) Add "Information to be given in the test report" (see Clause 13).
This document, using translation method, is identical to IEC 60068-2-52.2017
"Environmental testing - Part 2-52.Tests - Test Kb. Salt mist, cyclic (sodium
chloride solution)".
China’s documents which have a consistent correspondence with the
international documents normatively referenced in this document are as follows.
- GB/T 2421-2020 Environmental testing - General and guidance (IEC
60068-1.2013, IDT);
- GB/T 2423.3-2016 Environmental testing - Part 2.Testing method - Test
Cab. Damp heat, steady state (IEC 60068-2-78.2012, IDT);
- GB/T 10125-2012 Corrosion tests in artificial atmospheres - Salt spray tests
(ISO 9227.2006, IDT).
This document has made the following editorial changes.
a) Change the name of this document to "Environmental testing - Part 2.Test
methods - Test Kb. Salt mist, cyclic (sodium chloride solution)";
b) Add an informative annex "Constituent documents of GB/T 2423" (see
Annex NA).
Attention is drawn to the possibility that some of the elements of this document
may be the subject of patent rights. The issuing authority of this document shall
not be held responsible for identifying any or all such patent rights.
This document was proposed by and shall be under the jurisdiction of National
Technical Committee 8 on Environmental Conditions of Electric and Electronic
Products and Environmental Test of Standardization Administration of China
(SAC/TC 8).
Drafting organizations of this document. China National Electric Apparatus
Research Institute Co., Ltd.; CVC Certification & Testing Co., Ltd.; Tsinghua
Shenzhen International Graduate School; Beijing Goldwind Science & Creation
Windpower Equipment Co., Ltd.; Shenzhen ORT Testing Technology Co., Ltd.;
Electric Power Research Institute of Hainan Power Grid Co., Ltd.; Guangzhou
Power Supply Bureau of Guangdong Power Grid Co., Ltd.; Wuxi Sunan
Experimental Equipment Co., Ltd.; Wuxi Soyater Test Equipment Co., Ltd.;
Shanghai Rece Electronic Technology Co., Ltd.; CenerTech Tianjin Chemical
Research and Design Institute Co., Ltd.; Hongli Zhihui Group Co., Ltd.; Nanjing
Wuhe Test Equipment Co., Ltd.; Shenzhen Polytechnic; Chongqing Yinhe
Experimental Equipment Co., Ltd.; Fujian Xinneng Offshore Wind Power R&D
Center Co., Ltd.; Beihang University; CCIC Southern Testing Co., Ltd.; Ningbo
Ouzhi Electrical Technology Co., Ltd.; Shinry Technologies Co., Ltd.; The Fifth
Electronics Research Institute of the Ministry of Industry and Information
Technology; Hainan Power Grid Co., Ltd.
Main drafters of this document. Jie Ganxin, Xu Xuedong, Wang Xilin, Hu
Xiaoming, Mei Liguang, Che Hansheng, Zhao Hailong, Wang Yong, Ni Yangyi,
Zhou Zhongming, Xu Dazhong, Guo Zhijia, Lv Tiangang, Zhang Dinghu, Yu
Zhan, Li Shushan, Wang Mingyang, Wang Xiaohui, Ma Ping, Ke Cilong, Gao
Jun, Zhang Hongbin, Fang Lianhang, Jia Zhidong, Liu Jing, An Penghui, Hu
Zhishan.
The previous releases of this document and the documents it replaces are as
follows.
- It was first issued in 1985 as GB/T 2423.18-1985, first revised in 2000, and
second revised in 2012;
- This is the third revision.
1 Scope
This document specifies the application of the cyclic salt mist test to
components or equipment designed to withstand a salt-laden atmosphere as
salt can degrade the performance of metallic and/or non-metallic materials.
This document is applicable to components or equipment that can withstand a
salt-laden atmosphere.
2 Normative references
The contents of the following documents, through normative references in this
text, constitute indispensable provisions of this document. Among them, for
dated references, only the edition corresponding to that date applies to this
document. For undated references, the latest edition (including all amendments)
applies to this document.
ISO 9227 Corrosion tests in artificial atmospheres - Salt spray tests
IEC 60068-1 Environmental testing - Part 1.General and guidance
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at
the following addresses.
4 General description of the test
Heated air in the chamber may cause evaporation of water from the test
specimen surface from decreasing relative humidity and increased specimen
temperature.
As the relative humidity increases, precipitated salt crystals on the specimen
surface absorb water vapour until a liquid electrolytic solution forms,
reinitializing the corrosion process.
The test specimen is allowed to equilibrate with standard laboratory conditions,
which results in gradual drying and relaxation from most corrosion reactions.
5 Test apparatus
The chamber shall conform to the requirements of ISO 9227.It shall maintain
a temperature of 35 °C ± 2 K.
The chamber shall conform to the requirements of IEC 60068-1.It shall
maintain a relative humidity of 50 % ± 5 % at a temperature of 23 °C ± 2 K.
The chamber shall maintain a relative humidity of less than 30 % at a
temperature of 60 °C ± 2 K.
6 Salt solution
The pH adjustment shall conform to the requirements of ISO 9227 for the
neutral salt solution test.
If necessary, filter the solution before placing it in the reservoir of the apparatus
to remove any solid matter which might block the apertures of the spraying
device.
7 Initial measurements
The test specimen(s) shall be visually inspected and, if necessary, electrically
and mechanically checked as required by the relevant specification.
8 Preconditioning
The relevant specification shall specify the cleaning procedure to be applied
immediately before the test; it shall also state whether temporary protective
coatings shall be removed.
9 Testing
All test methods may be performed in a single chamber provided it is capable
of maintaining the required conditions. If not, care should be taken to avoid loss
of salt solution deposits on the test specimen(s) and to avoid any damage to
the test specimen(s) due to manual handling.
One cycle is 8 h, as specified in test method 7 using acidified salt solution
instead of neutral salt solution. The recommended number of cycles is the same
as in test method 7.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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