BS ISO 16539-2013 Corrosion of metals and alloys Accelerated cyclic corrosion tests with exposure to synthetic ocean water salt-deposition process $0QDry$0R and $0Qwet$0R condition.pdf
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1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS ISO 16539:2013Corrosion of metals andalloys Accelerated cycliccorrosion tests with exposureto synthetic ocean watersalt-deposition process “Dry“ and “wet“ conditions atconstan
2、t absolute humidityBS ISO 16539:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of ISO 16539:2013.The UK participation in its preparation was entrusted to TechnicalCommittee ISE/NFE/8, Corrosion of metals and alloys.A list of organizations represented on this com
3、mittee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 73640 7ICS 77.060Co
4、mpliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Committee on 28 February 2013.Amendments issued since publicationDate Text affectedBS ISO 16539:2013 ISO 2013Corrosion of metals a
5、nd alloys Accelerated cyclic corrosion tests with exposure to synthetic ocean water salt-deposition process “Dry” and “wet” conditions at constant absolute humidityCorrosion des mtaux et alliages Essais de corrosion cyclique acclre avec exposition leau de mer synthtique par procd de dpt de sel Condi
6、tions “sches” et conditions “humides” taux dhumidit absolue constantINTERNATIONAL STANDARDISO16539First edition2013-03-01Reference numberISO 16539:2013(E)BS ISO 16539:2013ISO 16539:2013(E)ii ISO 2013 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2013All rights reserved. Unless otherwise specif
7、ied, 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 on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below or ISO
8、s member body in the country of the requester.ISO copyright officeCase postale 56 CH-1211 Geneva 20Tel. + 41 22 749 01 11Fax + 41 22 749 09 47E-mail copyrightiso.orgWeb www.iso.orgPublished in SwitzerlandBS ISO 16539:2013ISO 16539:2013(E) ISO 2013 All rights reserved iiiContents PageForeword ivIntro
9、duction v1 Scope . 12 Normative references 13 Test solution 23.1 Preparation of the mixed salt solution . 23.2 pH adjustment . 23.3 Preparation of the test solution 24 Apparatus . 34.1 Component protection . 34.2 Exposure cabinet . 34.3 Salt deposition device . 34.4 Temperature and humidity control
10、device . 34.5 Rinse treatment of specimens . 34.6 Types of apparatus 35 Test specimens 46 Salt deposition measurement method 47 Arrangement of the test specimens 48 Operating conditions and procedure 49 Treatment of specimens after test . 910 Continuity of tests . 911 Duration of tests 912 Evaluatio
11、n of results . 913 Test report . 9Annex A (informative) Combined cyclic test instrument with salt deposition unit (two cabinets) .11Annex B (informative) Combined cyclic test instrument with salt deposition unit (one cabinet) .12Annex C (informative) Salt deposition method by manual spraying 13Annex
12、 D (informative) Recommended periods of testing .15Annex E (informative) Methods for evaluation of corrosivity of test .17Bibliography .19BS ISO 16539:2013ISO 16539:2013(E)ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO mem
13、ber bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmen
14、tal 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.International Standards are drafted in accordance with the rules given in the ISO/IEC Direct
15、ives, Part 2.The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies
16、 casting a vote.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights.ISO 16539 was prepared by Technical Committee ISO/TC 156, Corrosion of metals and allo
17、ys.iv ISO 2013 All rights reservedBS ISO 16539:2013ISO 16539:2013(E)IntroductionCorrosion of metallic materials, with or without corrosion protection, is influenced by many environmental factors, the importance of which can vary with the type of metallic materials and with the type of environment. I
18、t is impossible, therefore, to design accelerated laboratory corrosion tests in such a way that all environmental factors influencing resistance to corrosion are taken into account. Laboratory tests are, therefore, designed to simulate the effects of most important factors, which enhance the corrosi
19、on of metallic materials.The accelerated corrosion tests described in this International Standard are designed to simulate and enhance the environmental influence on a metallic material of exposure to outdoor climates, where exposure to salt-contaminated conditions occurs and can promote corrosion.
20、It has been prepared by reference to technical papers and reports (see the Bibliography).The particular advantages of two tests described in this International Standard over conventional accelerated tests, such as the neutral salt spray test (NSS) as specified in ISO 9227 and the wet (salt fog)/dry/
21、humidity test as specified in ISO 14993, lies in their better ability to reproduce the corrosion that occurs in atmospheric environments which contain much sea salt.Accelerated corrosion tests to simulate atmospheric corrosion in such environments are intended/expected to include the following requi
22、rements.a) Constant absolute humidity: It is generally observed that temperature and relative humidity change under a constant absolute humidity in outdoor environments. The water absorption of deposited salts is an important factor affecting atmospheric corrosion behaviour. The same relationship, c
23、onstant absolute humidity, as an actual environment is intended/expected to exist for temperature and relative humidity during dry/wet cycles.b) Control of the amount of salt deposition: The amount of the salt deposition on test specimens is intended/expected to be changed according to the corrosivi
24、ty of the atmosphere in which the tested metallic material can be used. A salt-containing test solution is intended/expected to be diluted or the spraying time is intended/expected to be adjusted to provide the same yearly average amount of the salt deposition as an actual environment.Therefore, the
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