ISO INTERNATIONAL STANDARD 6617 First edition 1994-10-15 Petroleum-based lubricating oils - Ageing characteristics Determination of change in Conradson carbon residue after oxidation Huile de graissage a base de pétrole -- Caracteristiques de vieillissement _ Détermination de I'augmentation du residu de carbone Conradson apres oxydation ISO Reference number ISO 6617:1994(E) No reproduction or networking permitted without license from IHS Not for Resale ISO 6617:1994(E) Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (IsO member bodies). The work of preparing International Standards is normally carried out through isO which a technical committee has been established has the right to be and non-governmental, in liaison with IsO, also take part in the work. IsO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International a vote. International Standard ISO 6617 was prepared by Technical Committee ISO/TC 28, Petroleum products and lubricants, Subcommittee SC 4, Classifications and specifications. Annex A forms an integral part of this International Standard. ISO 1994 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 the publisher. nternational OrganizationforStandardization Case Postale 56 · CH-1211 Geneve 20 · Switzerland Printed in Switzerland Copyight International Organizatin for Standardization No reproduction or networking permited without license from IHS Not for Resale INTERNATIONALSTANDARDISO ISO 6617:1994(E) Petroleum-based lubricating oils — Ageing characteristics - Determination of change in Conradson carbon residue after oxidation WARNING- - The use of this International Standard may involve hazardous materials, operations and equipment. This standard does not purport to address all of the safety problems associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use. Scope 3Definition This International Standard specifies a procedure for For the purposes of this International Standard, the determination of the ageing characteristics of following definition applies. petroleum-basedlubricatingoils.Itisapplicableto thoseoilswhichhaveanevaporationlossoflessthan 3.1 ageing characteristics: Characteristics of a 15 % mass fraction, as determined by the procedure petroleum-based lubricating oil as determined by the specified in 9.3 of this standard. increase in the Conradson carbon residue of the oil aged in accordance with this International Standard in comparison to that of the same non-aged oil. 4Principle The oil sample to be tested is aged for two 6-h peri- 2 Normative references ods at a temperature of 200 °C while air is passed through the oil. The value of the Conradson carbon The following standards contain provisions which, residue of the aged sample is determined according through reference in this text, constitute provisions to ISo 6615. The Conradson carbon residue of the ofthisInternationalStandard.Atthetimeofpubli- non-aged oil, also determined according to ISO 6615, cation, the editions indicated were valid. All standards is subtracted from this value. The increase in the are subject to revision, and parties to agreements value of the carbon residue of the aged oil over that based on this International Standard are encouraged of the non-aged oil is reported as the result. to investigate the possibility of applying the most re- cent editions of the standards indicated below. Under no circumstance may the proc