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GB/T 9279.1-2015: Paints and varnishes -- Determination of scratch resistance -- Part 1: Constant-loading method 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 9279.1: Historical versions
GB/T 9279.1-2015: Paints and varnishes -- Determination of scratch resistance -- Part 1: Constant-loading method---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/GBT9279.1-2015 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 87.040 G 50 GB/T 9279.1-2015 / ISO 1518-1.2011 Replacing GB/T 9279-2007 Paints and varnishes - Determination of scratch resistance - Part 1.Constant-loading method (ISO 1518-1.2011, IDT) Issued on: JUNE 02, 2015 Implemented on: JANUARY 01, 2016 Issued by. General Administration of Quality Supervision, Inspection and Quarantine of PRC; National Standardization Administration. Table of ContentsForeword... 3 1 Scope... 5 2 Normative references... 5 3 Principle... 5 4 Instruments... 6 5 Sampling... 8 6 Test plate... 8 7 Procedure... 8 8 Precision... 9 9 Test report... 10 References... 12ForewordGB/T 9279 "Paints and varnishes - Determination of scratch resistance" is divided into two parts. - Part 1.Constant-loading method; - Part 2.Variable-loading method. This Part is Part 1 of GB/T 9279. This Part was drafted in accordance with the rules given in GB/T 1.1-2009. This Part replaces GB/T 9279-2007 "Paints and varnishes - Scratch test". Compared with GB/T 9279-2007, the main technical changes are as follows. - ADD the principle part (see Chapter 3); - ADD two versions of test instruments (see 4.1); - MODIFY the minimum length of the scratch, from 60 mm to 40 mm (see 4.1; 4.1 of the 2007 edition); - ADD the precision part (see Chapter 8); - CANCEL the Appendix A and Appendix B (see Appendix A and Appendix B of the 2007 edition). This Part uses the translation method to identically adopt the international standard ISO 1518-1.2011 "Paints and varnishes - Determination of scratch resistance - Part 1. Constant-loading method". The Chinese documents that have a consistent correspondence with the international documents normatively referenced in this Part are as follows. - GB/T 3186-2006 Paints, varnishes and raw materials for paints and varnishes - Sampling (ISO 15528.2000, IDT); - GB/T 9271-2008 Paints and varnishes standard panels for testing (ISO 1514.2004, MOD); - GB/T 13452.2-2008 Paints and varnishes - Determination of film thickness (ISO 2808.2007, IDT); - GB/T 20777-2006 Paints and varnishes - Examination and preparation of samples for testing (ISO 1513.1992, IDT). This Part was proposed by China Petroleum and Chemical Industry Federation. Paints and varnishes - Determination of scratch resistance - Part 1.Constant-loading method1 ScopeThis Part of GB/T 9279 specifies a test method for determining the resistance of a single coating or a composite coating system of a paint, varnish or related product to scratching by a stylus loaded with a specified load under specified conditions. The stylus shall penetrate the substrate, but the composite coating system is an exception. In this case, the stylus can penetrate the substrate or the intermediate coating. This test method can be carried out as follows. - As a "pass/fail" test, i.e., a specified load is applied to the stylus to assess compliance with a specific specification; - By gradually increasing the load on the stylus to determine the minimum load at which the coating is penetrated.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. ISO 1513 Paints and varnishes - Examination and preparation of test samples ISO 1514 Paints and varnishes - Standard panels for testing ISO 2808 Paints and varnishes - Determination of film thickness ISO 15528 Paints, varnishes and raw materials for paints and varnishes - Sampling3 PrincipleA stylus with a specified load is applied across the coating at a constant speed. The scratch mark is examined to determine whether the coating has been penetrated to a specified extent for a single specified test load (a "pass/fail" test); or to determine the minimum test load required to penetrate the coating. ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. |
