NF EN ISO 1518-1

Le présent document spécifie une méthode d'essai pour la détermination, dans des conditions définies, de la résistance à la pénétration d'un revêtement monocouche ou d'un système multicouche de peinture, de vernis ou de produit assimilé, par rayure au moyen d'un stylet à rayer sur lequel est appliquée une charge spécifiée. La pénétration du stylet se fait jusqu'au subjectile, sauf dans le cas d'un système multicouche où le stylet peut pénétrer soit jusqu'au subjectile, soit jusqu'à une couche intermédiaire. La Partie 2 traite de la méthode à charge variable.

<p class="MsoBodyText" style="mso-layout-grid-align: none; text-autospace: none;"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt;">This document specifies a test method for determining, under defined conditions, the resistance of a single coating or a multi-coat system of paint, varnish or related product to penetration, by scratching with a scratch stylus loaded with a specified load. The stylus penetrates to the substrate, except in the case of a multi-coat system, in which case the stylus can penetrate either to the substrate or to an intermediate coat.</span></p> <p class="MsoBodyText" style="mso-layout-grid-align: none; text-autospace: none;"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt;">The method specified can be carried out:</span></p> <p class="ListNumber1" style="tab-stops: 19.85pt 39.7pt 59.55pt 79.4pt 99.25pt 119.05pt 138.9pt 158.75pt 178.6pt 7.0cm; mso-layout-grid-align: none; text-autospace: none;"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt;">a)<span style="mso-tab-count: 1;">    </span>either as a “pass/fail” test, by testing with a single specified load applied to the stylus to assess conformity with a particular specification; or</span></p> <p class="ListNumber1" style="tab-stops: 19.85pt 39.7pt 59.55pt 79.4pt 99.25pt 119.05pt 138.9pt 158.75pt 178.6pt 7.0cm; mso-layout-grid-align: none; text-autospace: none;"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt;">b)<span style="mso-tab-count: 1;">    </span>as an assessment test by applying increasing loads to the stylus to determine the minimum load at which the coating is penetrated.</span></p> <p class="Note" style="tab-stops: 19.85pt 39.7pt 48.25pt 59.55pt 79.4pt 99.25pt 119.05pt 138.9pt 158.75pt 178.6pt 7.0cm; mso-layout-grid-align: none; text-autospace: none;"><span lang="EN-GB" style="mso-bidi-font-size: 12.0pt;">NOTE<span style="mso-tab-count: 1;">      </span>Neither this document nor <span class="stdpublisher"><span style="color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">ISO</span></span></span> <span class="stddocNumber"><span style="color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">1518</span></span></span>-<span class="stddocPartNumber"><span style="color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">2</span></span></span> specifies a method using a curved stylus, which is specified in <span class="stdpublisher"><span style="color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">ISO</span></span></span> <span class="stddocNumber"><span style="color: black; mso-color-alt: windowtext; border: none;"><span style="border: none;">12137</span></span></span>. The choice between the three methods depends on the particular practical problem.</span></p>