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GB/T 2423.18-2021   Environmental testing—Part 2: Test methods—Test Kb:Salt mist, cyclic(sodium chloride solution) (English Version)
Standard No.: GB/T 2423.18-2021 Status:valid remind me the status change

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Implemented on:2021-12-1 Delivery: via email in 1 business day
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Standard No.: GB/T 2423.18-2021
English Name: Environmental testing—Part 2: Test methods—Test Kb:Salt mist, cyclic(sodium chloride solution)
Chinese Name: 环境试验 第2部分:试验方法 试验Kb:盐雾,交变(氯化钠溶液)
Chinese Classification: K04    Basic standards and general methods
Professional Classification: GB    National Standard
Issued by: SAMR, SAC
Issued on: 2021-05-21
Implemented on: 2021-12-1
Status: valid
Superseding:GB/T 2423.18-2012 Environmental testing - Part 2: Test methods - Test Kb: Salt mist, cyclic (sodium chloride solution)
Language: English
File Format: PDF
Word Count: 7500 words
Price(USD): 220.0
Delivery: via email in 1 business day
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 parts manufactured using metallic and/or non-metallic materials. This document is applicable to components or equipment that can withstand salty atmosphere, and the corresponding severity level is selected according to the degree of tolerance during the test. 2 Normative references The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 9227 Corrosion tests in artificial atmospheres - Salt spray tests IEC 60068-1 Environmental testing - Part 1: General and guidance IEC 60068-2-78 Environmental testing - Part 2-78: Tests - Test Cab: Damp heat,steady state 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: IEC Electropedia: available at http://www.electropedia.org/ ISO Online browsing platform: available at http://www.iso.org/obp 4 General description of test 4.1 Description of each test condition 4.1.1 General This document consists of the cyclic test conditions of salt mist, dry condition, humid condition and standard atmosphere. The effect of each test condition is as follows. Note: Salt mist is also called salt spray. The test specimen(s) is typically not energized during the test. 4.1.2 Salt mist The test specimen is corroded by an electrochemical or complex chemical reaction with neutral or acidified salt solution. Salt solution forms a thin electrolytic film on the test specimen surface. This can initiate corrosion and can allow it to proceed. 4.1.3 Dry condition Heated air in the chamber may cause evaporation of water from the test specimen surface from decreasing relative humidity and increased specimen temperature. This causes the concentration of the solution to increase and speeds up chemical reactions, accelerating the corrosion process. Salt precipitates out of the solution onto the test specimen surface during this condition. Evaporation and heating rates may vary based on the test chamber and test specimen. 4.1.4 Humid condition 4.1.4.1 Dry condition to humid condition 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. 4.1.4.2 Salt mist to humid condition The humid condition maintains the existing wetness on the test specimen surface at the end of the salt mist period, without excessive dilution of the solution that may result from condensing humidity. 4.1.5 Standard atmosphere The test specimen is allowed to equilibrate with standard laboratory conditions, which results in gradual drying and relaxation from most corrosion reactions. The period of dry atmosphere may occur, in practice, during breaks of operation, for example during the weekend. The inclusion of such a dry period may lead to corrosion mechanisms which can be quite different from those under constant wet conditions. The test schedule shall be chosen in order to respect the timelines given in 9.4. Additional dry periods (e.g. during a weekend) shall be avoided.
Foreword I Introduction III 1 Scope 2 Normative references 3 Terms and definitions 4 General description of test 5 Test apparatus 6 Salt solution 7 Initial measurements 8 Preconditioning 9 Testing 10 Recovery (at the end of testing) 11 Final measurements 12 Information to be given in the relevant specification 13 Information to be given in the test report Annex A (Informative) Typical apparatus for cyclic salt mist, humid condition, dry condition and standard atmosphere corrosion tests Annex B (Informative) Description of each test method Annex NA (Informative) The components of the standard GB/T Bibliography Figure A.1 Example of test apparatus Table 1 Test cycles for test methods 1 to
Referred in GB/T 2423.18-2021:
*QB/T 1858-2004 Perfume and cologne
*GB/T 14272-2011 Down Garments
*GB/T 14272-2021 Down garments
*GB 4706.1-2005 Household and Similar Electrical Appliances – Safety - Part 1: General Requirements
*FZ/T 73020-2012 Knitted Casual Wear
*FZ/T 73020-2019 Knitted casual wear
*GB 4806.7-2016 National Food Safety Standard - Food Contact Plastic Materials and Articles
*FZ/T 81008-2011 Jackets
*GB 18401-2003 National General Safety Technical Code for Textile Products
*GB 18401-2010 National general safety technical code for textile products
GB/T 2423.18-2021 is referred in:
*NB/T 10213-2019 Wind turbines-Pitch slip ring
*GB/T 21413.2-2021 Railway applications—Electric equipment for rolling stock—Part 2:Electrotechnical components—General rules
*GB/T 31024.4-2019 Cooperative intelligent transportation systems—Dedicated short range communications—Part 4: Equipment application specification
*GB/T 42284.4-2022 Road vehicles—Environmental conditions and testing for electrical and electronic equipment for drive system of electric propulsion vehicles—Part 4: Climatic loads
Code of China
Standard
GB/T 2423.18-2021  Environmental testing—Part 2: Test methods—Test Kb:Salt mist, cyclic(sodium chloride solution) (English Version)
Standard No.GB/T 2423.18-2021
Statusvalid
LanguageEnglish
File FormatPDF
Word Count7500 words
Price(USD)220.0
Implemented on2021-12-1
Deliveryvia email in 1 business day
Detail of GB/T 2423.18-2021
Standard No.
GB/T 2423.18-2021
English Name
Environmental testing—Part 2: Test methods—Test Kb:Salt mist, cyclic(sodium chloride solution)
Chinese Name
环境试验 第2部分:试验方法 试验Kb:盐雾,交变(氯化钠溶液)
Chinese Classification
K04
Professional Classification
GB
ICS Classification
Issued by
SAMR, SAC
Issued on
2021-05-21
Implemented on
2021-12-1
Status
valid
Superseded by
Superseded on
Abolished on
Superseding
GB/T 2423.18-2012 Environmental testing - Part 2: Test methods - Test Kb: Salt mist, cyclic (sodium chloride solution)
Language
English
File Format
PDF
Word Count
7500 words
Price(USD)
220.0
Keywords
GB/T 2423.18-2021, GB 2423.18-2021, GBT 2423.18-2021, GB/T2423.18-2021, GB/T 2423.18, GB/T2423.18, GB2423.18-2021, GB 2423.18, GB2423.18, GBT2423.18-2021, GBT 2423.18, GBT2423.18
Introduction of GB/T 2423.18-2021
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 parts manufactured using metallic and/or non-metallic materials. This document is applicable to components or equipment that can withstand salty atmosphere, and the corresponding severity level is selected according to the degree of tolerance during the test. 2 Normative references The following documents contain provisions which, through reference in this text, constitute provisions of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 9227 Corrosion tests in artificial atmospheres - Salt spray tests IEC 60068-1 Environmental testing - Part 1: General and guidance IEC 60068-2-78 Environmental testing - Part 2-78: Tests - Test Cab: Damp heat,steady state 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: IEC Electropedia: available at http://www.electropedia.org/ ISO Online browsing platform: available at http://www.iso.org/obp 4 General description of test 4.1 Description of each test condition 4.1.1 General This document consists of the cyclic test conditions of salt mist, dry condition, humid condition and standard atmosphere. The effect of each test condition is as follows. Note: Salt mist is also called salt spray. The test specimen(s) is typically not energized during the test. 4.1.2 Salt mist The test specimen is corroded by an electrochemical or complex chemical reaction with neutral or acidified salt solution. Salt solution forms a thin electrolytic film on the test specimen surface. This can initiate corrosion and can allow it to proceed. 4.1.3 Dry condition Heated air in the chamber may cause evaporation of water from the test specimen surface from decreasing relative humidity and increased specimen temperature. This causes the concentration of the solution to increase and speeds up chemical reactions, accelerating the corrosion process. Salt precipitates out of the solution onto the test specimen surface during this condition. Evaporation and heating rates may vary based on the test chamber and test specimen. 4.1.4 Humid condition 4.1.4.1 Dry condition to humid condition 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. 4.1.4.2 Salt mist to humid condition The humid condition maintains the existing wetness on the test specimen surface at the end of the salt mist period, without excessive dilution of the solution that may result from condensing humidity. 4.1.5 Standard atmosphere The test specimen is allowed to equilibrate with standard laboratory conditions, which results in gradual drying and relaxation from most corrosion reactions. The period of dry atmosphere may occur, in practice, during breaks of operation, for example during the weekend. The inclusion of such a dry period may lead to corrosion mechanisms which can be quite different from those under constant wet conditions. The test schedule shall be chosen in order to respect the timelines given in 9.4. Additional dry periods (e.g. during a weekend) shall be avoided.
Contents of GB/T 2423.18-2021
Foreword I Introduction III 1 Scope 2 Normative references 3 Terms and definitions 4 General description of test 5 Test apparatus 6 Salt solution 7 Initial measurements 8 Preconditioning 9 Testing 10 Recovery (at the end of testing) 11 Final measurements 12 Information to be given in the relevant specification 13 Information to be given in the test report Annex A (Informative) Typical apparatus for cyclic salt mist, humid condition, dry condition and standard atmosphere corrosion tests Annex B (Informative) Description of each test method Annex NA (Informative) The components of the standard GB/T Bibliography Figure A.1 Example of test apparatus Table 1 Test cycles for test methods 1 to
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Keywords:
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