GB/T 10125-2021 PDF EnglishUS$350.00 · In stock · Download in 9 seconds
GB/T 10125-2021: Corrosion tests in artificial atmospheres - Salt spray tests 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 10125: Historical versions
Similar standardsGB/T 10125-2021: Corrosion tests in artificial atmospheres - Salt spray tests---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/GBT10125-2021GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.060 CCS H 25 Replacing GB/T 10125-2012 Corrosion tests in artificial atmospheres - Salt spray tests (ISO 9227.2017, MOD) Issued on. AUGUST 20, 2021 Implemented on. MARCH 01, 2022 Issued by. State Administration for Market Regulation; Standardization Administration of PRC. Table of ContentsForeword... 4 Introduction... 7 1 Scope... 8 2 Normative references... 9 3 Terms and definitions... 10 4 Principle... 11 5 Test solution... 11 6 Test equipment... 12 7 Methods of evaluating the performance of salt spray chamber... 15 8 Test specimen... 17 9 Placement of test specimens... 18 10 Test conditions... 18 11 Test period... 19 12 Handling of test specimens after the test... 20 13 Evaluation of test results... 21 14 Test report... 21 Appendix A (Informative) Comparison of clause numbers between this document and ISO 9227.2017... 23 Appendix B (Informative) List of technical differences between this document and ISO 9227.2017 and their reasons... 24 Appendix C (Informative) A schematic diagram of the design of a salt spray chamber with the function of treating salt spray waste gas and wastewater.. 26 Appendix D (Informative) Supplementary method for evaluating the performance of salt spray chamber by using zinc reference specimen... 28 Appendix E (Normative) Preparation of organic coating specimen... 30 Appendix F (Normative) Additional information for organic coating test specimens... 32 Appendix G (Informative) Supplementary information about steel reference specimen's designation... 33 References... 34ForewordThis document was drafted in accordance with the rules given in GB/T 1.1-2020 "Directives for standardization - Part 1.Rules for the structure and drafting of standardizing documents". This document replaces GB/T 10125-2012 "Corrosion tests in artificial atmospheres - Salt spray tests". Compared with GB/T 10125-2012, in addition to structural adjustments and editorial changes, the main technical changes are as follows. - ADD the scope of application of the acetic acid salt spray test, copper accelerated acetic acid salt spray test, as well as the unapplicable scope of this method (see Chapter 1); - MODIFY and ADD the normative references (see Chapter 2; Chapter 2 of the 2012 edition); - ADD Chapter 3 "Terms and definitions"; - ADD Chapter 4 "Principles"; - MODIFY the control requirements for the heavy metal impurity content of sodium chloride, which is used in solution preparation (see 5.1; 3.1 of the 2012 edition); - MODIFY the method of measuring the pH value of the collected spray solution (see 5.2; 3.2 of the 2012 edition); - ADD the requirements for specimen holders (see 6.1); - DELETE the requirement that the volume of the salt spray chamber is not less than 0.4 m3 (see 4.2 of the 2012 edition); - ADD the new requirements for spraying in the salt spray chamber (see 6.2); - MODIFY the requirements for the location of the temperature measurement area (see 6.3; 4.3 of the 2012 edition); - ADD the recommended value of spray pressure (see 6.4.2); - MODIFY the requirements for compressed air humidification equipment (see 6.4.3; 4.4 of the 2012 edition); - ADD the guide value of the hot water temperature of the saturation tower, at 160 MPa and 170 MPa spray pressure (see Table 1); - ADD the operation method for obtaining stable, continuous, uniform spray (see 6.4); - ADD the precautions for cleaning after the salt spray chamber test (see 6.6); - MODIFY the use quantity and treatment method of steel reference specimens (see 7.2; 5.2.1, 5.3.1, 5.4.1 of the 2012 edition); - MODIFY the number of steel reference specimens, which are placed in the salt spray chamber, as well as the requirements for the verification method of the salt spray chamber (see 7.3; 5.2.2, 5.3.2, 5.4.2 of the 2012 edition); - DELETE the test time (see 5.2.2, 5.3.2, 5.4.2 of the 2012 edition); - DELETE the method for removing steel corrosion products, which is specified in ISO 8407 (see 5.2.3, 5.3.3, 5.4.3 of the 2012 edition); - MODIFY the writing format of the performance evaluation method of salt spray chamber for the neutral salt spray, acetic acid salt spray, copper accelerated acetic acid salt spray test (see Chapter 7; Chapter 5 of the 2012 edition); - ADD the parameter setting value requirements of the salt spray chamber (see Table 3); - ADD the precautions for the concentration and pH measurement of the salt spray collection solution (see 10.2); - ADD the recommended value for the test frequency of salt spray sedimentation rate (see 10.3); - ADD measures to prevent fluctuations in the concentration and pH of sodium chloride solution (see 10.5); - MODIFY the recommended value of the test period (see 11.1; 9.1 of the 2012 edition); - ADD the requirement that the opening time of the salt spray chamber shall not exceed 1 hour per day, during the test (see 11.2); - ADD an overview of the test sample treatment method after the test (see 12.1); - ADD the specific method for handling the test specimen of the organic coating after the test (see 12.3); - MODIFY the design diagram of the salt spray chamber (see Figure C.1, Figure C.2; Figure A.1, Figure A.2 in Appendix A of the 2012 edition); - MODIFY the number of zinc reference specimens, which are placed in the salt spray chamber, as well as the requirements for the verification method of the salt spray chamber (see D.1, D.2; B.1, B.2 of the 2012 edition); - MODIFY the value of the distance between scratches on the organic coating test specimens (see E.4; C.4 of the 2012 edition); - MODIFY the Appendix G China's foreign standard year number (see Appendix G; Appendix E of the 2012 edition); - DELETE the "Appendix NA" (see Appendix NA of the 2012 edition). This document uses the redrafting method, to modify and adopt ISO 9227.2017 "Corrosion tests in artificial atmospheres - Salt spray tests". Compared with ISO 9227.2017, this document has more structural adjustments. Appendix A lists the comparison of structural adjustment between this document and ISO 9227.2017. There are technical differences between this document and ISO 9227.2017. The terms of these differences have been marked by a vertical single line (|), on the outer margin of the document. Appendix B gives a list of the corresponding technical differences and their reasons. Please note that some of the contents of this document may involve patents. The issuing agency of this document is not responsible for identifying patents. This document was proposed by the China Iron and Steel Association. This document shall be under the jurisdiction of the National Steel Standardization Technical Committee (SAC/TC 183). This document was first published in 1997.It was revised for the first time in 2012.This is the second revision.1 ScopeThis document specifies the equipment, reagents, methods for neutral salt spray (NSS), acetic acid salt spray (AASS), copper accelerated acetic acid salt spray (CASS) tests. This document also specifies methods for evaluating the corrosiveness of the test chamber atmosphere.2 Normative referencesThe following documents are essential to the application of this document. For the dated documents, only the versions with the dates indicated are applicable to this document; for the undated documents, only the latest version (including all the amendments) is applicable to this standard. GB/T 6461 Methods for corrosion testing of metallic and other inorganic coatings on metallic substrates - Rating of test specimens and manufactured articles subjected to corrosion tests (GB/T 6461-2002, ISO 10289.1999, IDT) GB/T 9271 Paints and varnishes standard panels for testing (GB/T 9271- 2008, ISO 1514.2004, MOD) GB/T 10123 Corrosion of metals and alloys - Basic terms and definitions (GB/T 10123-2001, eqv ISO 8044-1999) GB/T 13452.2 Paints and varnishes - Determination of film thickness (GB/T 13452.2-2008, ISO 2808.2007, IDT) GB/T 16545 Corrosion of metals and alloys - Removal of corrosion products from corrosion test specimens (GB/T 16545-2015, ISO 8407.2009, IDT) GB/T 30786 Paints and varnishes - Guidelines for the introduction of scribe marks through coatings on metallic panels for corrosion testing (GB/T 30786-2014, ISO 17872-2007, IDT)3 Terms and definitionsThe terms and definitions, as defined in GB/T 10123, as well as the following terms and definitions, apply to this document. 3.1 Reference material Materials with known test performance. 3.2 Reference specimen Part of the reference material (3.1), which is to check the reproducibility and repeatability of the test results of the test chamber used.4 PrincipleThe neutral salt spray test (NSS) is a test method, for atomizing a 5% sodium chloride neutral solution, in a controlled environment. The acetic acid salt spray test (AASS) is a test method, in which a 5% sodium chloride acid solution, added with glacial acetic acid, is atomized, in a controlled environment.5 Test solutionAt a temperature of 25 °C ± 2 °C, dissolve sodium chloride in distilled water or deionized water, which has a conductivity of not higher than 20 µS/cm, to prepare a solution, which has a concentration of 50 g/L ± 5 g/L.6 Test equipmentAll components, which are in contact with salt spray or test solution, shall be made of corrosion-resistant materials, which do not affect the corrosiveness of the solution. The spray in the chamber shall be evenly distributed. For the chambers, which have a capacity of less than 0.4 m3, due to the capacity restriction, it shall carefully consider the effect of the loading of the chamber on the spray distribution and temperature.7 Methods of evaluating the performance of salt spray chamberA steel reference specimen shall be used, to determine the corrosivity of the test. As a supplement to the steel reference specimen, the high-purity zinc reference specimen can be tested; the corrosion performance can be determined, with reference to the provisions of Appendix D.8 Test specimenThe type, quantity, shape, size of the test specimen shall be selected, according to the relevant specifications of the tested material or product. If the test specimen is cut from a workpiece, which has a covering layer, it shall not damage the covering layer near the cutting area.9 Placement of test specimensThe test specimen shall not be placed, where the salt mist is directly sprayed. The test specimen holder shall be made of inert non-metallic materials.10 Test conditionsDue to the different performance of the empty and fully loaded test chambers, check the salt spray sedimentation rate and other test conditions of the test chamber, with a similar loading volume, during the test.11 Test periodThe test period shall be selected, according to the relevant standards of the tested material or product. If there is no standard, it can be negotiated and agreed by related parties. The recommended test cycle is 2 h, 6 h, 24 h, 48 h, 96 h, 168 h, 240 h, 480 h, 720 h, 1008 h.12 Handling of test specimens after the testHow to handle the test specimen, after the test, shall be included in the test specification or material specification, which is provided by the customer.13 Evaluation of test resultsThe appropriate evaluation standard for the tested coating or product shall be determined in good engineering practice.14 Test reportThe test report shall state the test results, in accordance with the result evaluation criteria. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. 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