BS EN 13523-18:2020 pdf free.Coil coated metals – Test methods.Resistance to staining.
BS EN 13523-18 1 Scope This document specifies test procedures for assessing the effect of chemicals on the characteristics of an organic coating on a metallic substrate. It covers testing by using defined substances and to assess the change in characteristics such as discoloration, change in gloss, blistering, softening, swelling and loss of adhesion. Assessment of other phenomena can be agreed between the interested parties. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content constitutes requirements 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.EN 13523-0, Coil coated metals一Test methods一Part 0: General introduction EN 23270, Paints and varnishes and their raw materials一Temperatures and humidities for conditioning and testing (ISO 3270) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 13523-0 apply.ISO and IEC maintain terminological databases for use in standardization at the following addresses:  一 IEC Electropedia: available at http://www.electropedia.org/ 一ISO Online browsing platform: available at https://www.iso.org/obp Preparation and conditioning of test panels shall be in accordance with EN 13523-0.A representative panel shall be selected from the organic coating under test. Spot and direct application techniques may be carried out on the fabricated article coated with the finishing system to be tested, if flat
surface is available. For immersion tests and tests where the finished article is not available, panels shall be prepared after consultation and agreement between the interested parties.Unless otherwise agreed between the interested parties, carry out the test on a single test panel at ambient temperature. In case of dispute, the ambient temperature shall be defined as (23土2] °C and the relative humidity as (50土5) %, in accordance with EN 23270. Deposit the agreed substance (see the note in Clause 6) on the horizontal test panel or flat test surface of the fabricated article. For fluid substances, apply approximately 1 ml, using the pipette (5.2). For other substances, apply to an area approximately one half of the watch glass (5.1). Cover immediately with the watch glass.BS EN 13523-18 pdf downlaod.