ISO INTERNATIONAL STANDARD 16866 First edition 2020-10 Metallic and other inorganic coatings Simultaneous thickness and electrode potential determination of individual layers in multilayer nickel deposits (STEP test) Revetementsmétalliques etautres revetements inorganiques Determination simultanée de I'épaisseuret dupotentield'electrode de couches individuelles dans des depots de nickel multicouches (essai STEP) Reference number IS0 16866:2020(E) ISO IS02020 IS0 16866:2020(E) COPYRIGHTPROTECTEDDOCUMENT @IS02020 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting below or Iso's memberbody in the country ofthe requester. ISO copyright office CP 40i : Ch.de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +41 22.749 01 11 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2020 - All rights reserved IS0 16866:2020(E) Contents Page Foreword ..iv Introduction. .. 1 Scope. ..1 2 Normative references 3 Terms and definitions 4 Test equipment. 4.1 Construction of the measuring cell 4.2 Compositionofthetestsolution .2 5 Requirements .3 6 Sampling. .3 7 Factors influencing measurement accuracy .3 7.1 Electrolyte .3 7.2 Conditioning .3 7.3 Ni deposits. 3 7.4 Surface cleanliness. .3 7.5 Measurement area and contact pressure .3 7.6 Electrical contact. ..4 7.7 Complete dissolution 4 8 Procedure .4 8.1 General 8.2 Measurement 4 8.3 Evaluation. ..5 9 Measurement uncertainty 10 Test report Annex A (informative) Precision data obtained by a round robin test ..10 Bibliography ..11 @ IS0 2020 - All rights reserved ili