GB/T 2423.18-2021 PDF EnglishUS$225.00 · In stock · Download in 9 seconds
GB/T 2423.18-2021: Environmental testing - Part 2: Test methods - Test Kb: Salt mist, cyclic (sodium chloride solution) Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid GB/T 2423.18: Historical versions
Similar standardsGB/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 ContentsForeword... 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... 14ForewordThis 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 ScopeThis 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 referencesThe 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 guidance3 Terms and definitionsNo 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 testHeated 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 apparatusThe 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 solutionThe 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 measurementsThe test specimen(s) shall be visually inspected and, if necessary, electrically and mechanically checked as required by the relevant specification.8 PreconditioningThe 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 TestingAll 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. |
