GB/T 2423.18-2000 (GB/T 2423.18-2021 Newer Version) PDF English
GB/T 2423.18-2000 (GB/T2423.18-2000, GBT 2423.18-2000, GBT2423.18-2000)
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| GB/T 2423.18-2021 | English | 225 |
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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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| GB/T 2423.18-1985 | English | RFQ |
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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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Newer version: GB/T 2423.18-2021 Standards related to (historical): GB/T 2423.18-2021
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GB/T 2423.18-2000: PDF in English (GBT 2423.18-2000) GB/T 2423.18-2000
GB
NATIONAL STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 19.040
K 04
idt IEC 68-2-52.1996
Environmental testing - Part 2. Tests –
Test Kb. Salt mist, cyclic (sodium chloride solution)
ISSUED ON. JANUARY 3, 2000
IMPLEMENTED ON. AUGUST 1, 2000
Issued by. National Quality Supervision Bureau
This standard is replaced by GB/T 2423.18-2012
3. No action is required - Full-copy of this standard will be automatically &
immediately delivered to your EMAIL address in 0~60 minutes.
Table of Contents
Foreword ... 3
IEC Foreword ... 4
1 Scope ... 6
2 Normative references ... 7
3 General description of the test ... 7
4 Test apparatus ... 8
5 Salt solution ... 9
6 Severities ... 10
7 Initial measurements ... 11
8 Pre-conditioning ... 11
9 Testing ... 11
10 Recovery (at the end of testing) ... 12
11 Final measurements ... 13
12 Information to be given in the relevant specification ... 13
Foreword
This Standard identically uses the second edition of IEC 68-2-52.1996 and
modified GB/T 2423.18-1985 Environmental testing - Part 2. Tests - Test Kb.
Salt mist, cyclic (sodium chloride solution).
Considering the consistency with IEC standard, this Standard deleted the
content of artificial seawater formula in GB/T 2423.18-1985. The adoption of
the International standard is modified from non-equivalent use to equivalent
use.
Since the implementation of this Standard, GB/T 2423.18-1985 is replaced
simultaneously.
This Standard was proposed by Subcommittee on Climate of National
Electrical and Electronic Products Environmental Technology Committee.
This Standard shall be under the jurisdiction of National Technical Committee
on Electrical and Electronic Products - Environmental Conditions and
Environmental Testing of Standardization Administration of China.
The drafting organization of this Standard. Ministry of Communications
Standards Institute of Measurement.
Main drafters of this Standard. Tian Lin, Yuan Shuncai.
This Standard was issued on May 1985 for the first time; and was revised in
2000 for the first time.
This Standard entrusts Communications Standards Institute of Measurement
for interpretation.
Environmental testing - Part 2. Tests -
Test Kb. Salt mist, cyclic (sodium chloride solution)
1 Scope
This test is intended for application to components or equipment designed to
withstand a salt-laden atmosphere, depending on the chosen severity. Salt
can degrade the performance of parts manufactured using metallic and/or
non-metallic materials.
The mechanism of salt corrosion on metallic materials is electrochemical,
whereas the degradation effects experienced on non-metallic materials are
caused by complex chemical reactions of the salts with the materials involved.
The rate at which corrosive action takes place is dependent, to a large extent,
on the supply of oxygenated salt solution to the surface of the test specimen,
the temperature of the specimen and the temperature and humidity of the
environment.
Apart from the corrosive effects, this test may be used to indicate
deterioration of some non-metallic materials by assimilation of salts. In the
following test methods, the period of spraying with the relevant salt solution is
sufficient to wet the specimen thoroughly. Because this wetting is repeated
after intervals of storage under humid conditions (severities (1) and (2)) and -
in some cases severities ((3) to (6)) - supplemented by storage under a
standard atmosphere for testing, it goes some way to reproducing the effects
of natural environments.
Severities (1) and (2) are intended to be used for testing products which are
used in a marine environment, or in close proximity to the sea. Severity (1)
should be used to test products which are exposed to the environment for
much of their operational life (e.g. ship radar, deck equipment). Severity (2)
should be used to test products which may be exposed to the marine
environment from time to time but will normally be protected by an enclosure
(e.g. navigational equipment which will normally be used on the bridge or in a
control room).
Additionally, severities (1) and (2) are commonly used as a general corrosion
test in component quality assurance procedures.
Severities (3) to (6) are intended for products where, under normal use, there
is a frequent change between salt-laden and dry atmosphere, e.g.
......
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.
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