ISO INTERNATIONAL STANDARD 19840 Second edition 2012-09-01 Paints and varnishes Corrosion protection of steel structures by protective paint systems Measurement of, and acceptance criteria for, the thickness of dry films on rough surfaces Peintures et vernis Anticorrosion des structures en acier par systemes de peinture -Mesure et criteres d'acceptation de I'épaisseur d'un feuil sec sur des surfaces rugueuses Reference number ISO 19840:2012(E) LSO @ ISO 2012 HS under Not for Resale ISO19840:2012(E) COPYRIGHTPROTECTEDDOCUMENT ISO.2012 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Case postale 56 · CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ ISO 2012 - All rights reserved No reproduction networking permitted without license from IHS Not for Resale ISO 19840:2012(E) Contents Page Foreword ..iv Introduction 1 Scope 2 Normative references 3 Terms and definitions. .2 4 Principle. 3 4.1 General... 3 4.2 Principle of the applicable measurement methods .3 5 Apparatus and materials .. 3 5.1 General... 3 5.2 Measurement equipment using a magnetic field. 5.3 Materials... 6 Procedure 5 6.1 Sampling plan 5 6.2 Adjustment of the instrument, 6.3 Measurement. 6 7 Correction values 6 8 Expression of results 9 Acceptance/rejection criteria 10 Test report.. Annex A (informative) Method based on adjusting the instrument to known thicknesses on a roughsurface 9 Annex B (informative) Multiple readings. ..11 Annex C (informative) Areas requiring special consideration 12 Annex D (normative)Determination of a specific correctionvalue.. ..13 Annex E (informative) Example of a test report form... .14 Bibliography 16 ili license from IHS Not for Resale