ISO INTERNATIONAL STANDARD 28706-2 Second edition 2017-02 Vitreous and porcelain enamels - Determination of resistance to chemical corrosion - Part 2: Determination of resistance to chemical corrosion by boiling acids, boiling neutral liquids, alkaline liquids and/or their vapours Emaux vitrifiés - Détermination de la reésistance a la corrosion chimique- Partie 2: Détermination de la resistance a la corrosion chimique par des acides bouillants, des liquides neutres bouillants, ou des liquides alcalins et/ou leurs vapeurs Reference number IS0 28706-2:2017(E) ISO @ ISO 2017 IS0 28706-2:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS02017,PublishedinSwitzerland or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org ii @ IS0 2017 - All rights reserved IS0 28706-2:2017(E) Contents Page Foreword .V Introduction vi 1 Scope. 1 2 Normative references .1 3 Terms and definitions 4 Principle .2 5 Reagents .2 6 Apparatus and materials .3 6.1 Test apparatus 3 6.2 Test materials .8 7 Packing rings .8 7.1 General 7.2 Packing A .8 7.3 Packing B. .9 8 Test specimens. .9 9 Procedure .9 10 Expression of results .10 10.1 Total loss in mass per unit area 10 10.2 Corrosion rate .10 11 Boiling citric acid .11 11.1 General. 11 11.2 Test solution. .11 11.3 Duration of the test 11 11.4 Test report. 11 12 Boiling sulfuric acid .11 12.1 General .11 12.2 Test solution 11 12.3 Duration of the test 12 12.4 Test report. 12 13 Boiling hydrochloric acid 12 13.1 General. .12 13.2 Test solution 12 13.3 Duration of the test 12 13.4 Test report. 13 14 Boiling distilled or demineralized water 13 14.1 General. 13 14.2 Test solution. 13 14.3 Duration of the test 13 14.4 Test report. 14 15 Standard detergent solution .14 15.1 General 14 15.2 Test solution 14 15.3 Test temperature. 15 15.4 Duration of the test 15 15.5 Test report. .15 16 Other test solutions and/or conditions .15 16.1 General. 15 @ IS0 2017 - All rights reserved iii