1、BSI Standards PublicationRubber, vulcanized or thermoplastic Determination of tendency to adhere to and corrode metalsBS ISO 6505:2015National forewordThis British Standard is the UK implementation of ISO 6505:2015.It supersedes BS ISO 6505:2005 which is withdrawn.The UK participation in its prepara
2、tion was entrusted to TechnicalCommittee PRI/22, Physical testing of rubber.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisions ofa contract. Users are responsible for its correct a
3、pplication. The British Standards Institution 2015.Published by BSI Standards Limited 2015ISBN 978 0 580 85586 3ICS 83.060Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theStandards Policy and Strategy Commit
4、tee on 30 April 2015.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS ISO 6505:2015 ISO 2015Rubber, vulcanized or thermoplastic Determination of tendency to adhere to and corrode metalsCaoutchouc, vulcanis ou thermoplastique Dtermination de la tendance adhrer aux mt
5、aux et les corroder INTERNATIONAL STANDARDISO6505Fourth edition2015-03-15Reference numberISO 6505:2015(E)BS ISO 6505:2015ISO 6505:2015(E)ii ISO 2015 All rights reservedCOPYRIGHT PROTECTED DOCUMENT ISO 2015All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
6、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 ISOs member body in the country of the requester.ISO c
7、opyright 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 6505:2015ISO 6505:2015(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Principle 14 Materials . 15 Apparatus . 26 Test metal
8、s 27 Calibration 48 Test pieces . 48.1 Preparation 48.1.1 Square test pieces . 48.1.2 O-ring test pieces . 48.2 Number 48.3 Time-interval between forming the material and testing . 48.4 Storage . 49 Test conditions . 49.1 Temperature 49.2 Test period 59.3 Humidity . 510 Procedure. 510.1 Precaution .
9、 510.2 Preparation of rubber test pieces for testing 510.3 Number of metal test strips . 510.4 Preparation of surfaces of metal test strips . 510.5 Determination . 610.5.1 Tests in a dry atmosphere 610.5.2 Tests in a wet atmosphere . 611 Expression of results 711.1 Degree of adhesion 711.2 Degree of
10、 corrosion . 711.2.1 For tests in a dry atmosphere . 711.2.2 For tests in a wet atmosphere 812 Test report . 8Annex A (normative) Calibration schedule . 9Annex B (informative) Grading of degree of corrosion 11 ISO 2015 All rights reserved iiiContents PageBS ISO 6505:2015ISO 6505:2015(E)ForewordISO (
11、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 technical committees. Each member body interested in a subject for which a technical commi
12、ttee has been established has the right to be represented on that committee. International organizations, governmental 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 electrotec
13、hnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted
14、 in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).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
15、. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received (see www.iso.org/patents).Any trade name used in this document is information given for the convenience of users and does not constitute
16、 an endorsement.For an explanation on the meaning of ISO specific terms and expressions related to conformity assessment, as well as information about ISOs adherence to the WTO principles in the Technical Barriers to Trade (TBT) see the following URL: Foreword - Supplementary informationThe committe
17、e responsible for this document is ISO/TC 45, Rubber and rubber products, Subcommittee SC 2, Testing and analysis.This fourth edition cancels and replaces the third edition (ISO 6505:2005), which has been technically revised.iv ISO 2015 All rights reservedBS ISO 6505:2015ISO 6505:2015(E)Introduction
18、In assemblies which include both metallic and rubber components, it is essential to avoid unintentional adhesion of rubber to metal, and corrosion of the metal by the rubber. Adhesion occurs only where there is direct contact between the metal and the rubber, but corrosion can also arise, within a c
19、losed system, on metal components remote from the rubber, such corrosion being due to volatile materials emanating from the rubber.Since some metals corrode more readily than others, it is not possible to specify optimum test conditions for assessing the resistance to corrosion of all metals and all
20、oys. Furthermore, the ranking of a metals susceptibility to corrosion will depend upon the environment in which it is exposed to the rubber, e.g. in the presence of high humidity the effects on steel, in particular, can be severe. ISO 2015 All rights reserved vBS ISO 6505:2015Rubber, vulcanized or t
21、hermoplastic Determination of tendency to adhere to and corrode metalsWARNING 1 Persons using this International Standard should be familiar with normal laboratory practice. This standard does not purport to address all of the safety problems, if any, associated with its use. It is the responsibilit
22、y of the user to establish appropriate safety and health practices and to ensure compliance with any national regulatory conditions.WARNING 2 Certain procedures specified in this International Standard might involve the use or generation of substances, or the generation of waste, that could constitu
23、te a local environmental hazard. Reference should be made to appropriate documentation on safe handling and disposal after use.1 ScopeThis International Standard specifies a method for the determination of the tendency of vulcanized or thermoplastic rubbers to adhere to and to corrode metals when ex
24、posed to a specified test environment.2 Normative referencesThe following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments
25、) applies.ISO 48, Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD)ISO 3310-1, Test sieves Technical requirements and testing Part 1: Test sieves of metal wire clothISO 18899:2004, Rubber Guide to the calibration of test equipmentISO 23529, Rubber
26、General procedures for preparing and conditioning test pieces for physical test methods3 PrincipleRubber test pieces are held between metal test strips under specified conditions in a dry or wet atmosphere for a specified period.Subsequent visual examination of the metal surface provides a subjectiv
27、e indication of the degree of adhesion to the metal by the rubber and corrosion of the metal.4 Materials4.1 Acetone, (for cleaning of metal) of recognized analytical quality.4.2 Other suitable solvents, (for cleaning of rubber) of recognized analytical quality and which do not have any deleterious e
28、ffects on the rubber under test.4.3 Pumice powder, passing a test sieve of nominal aperture size 53 m complying with the requirements of ISO 3310-1.4.4 Distilled water, or water of equivalent purity.INTERNATIONAL STANDARD ISO 6505:2015(E) ISO 2015 All rights reserved 1BS ISO 6505:2015ISO 6505:2015(E
29、)4.5 Silica gel.5 Apparatus5.1 Usual laboratory equipment, plus the following.5.2 Support jig, to align the metal test strips and rubber test pieces, capable of supporting the clamping force, and with a facility for setting clamps to maintain the clamping force on the assembled test piece “sandwich”
30、 throughout the test period (see Figure 1).5.3 Test chamber, complying with the requirements specified in ISO 23529, with facilities for controlling the temperature within the tolerance limits given in ISO 23529.For tests other than those in a “dry” atmosphere, a suitable means for controlling the h
31、umidity to within the tolerance limits given in ISO 23529 shall be provided.For tests in a “dry” atmosphere (less than 10 % humidity), a desiccator may be used. For tests at elevated temperature, it is common practice to assume low humidity.For tests in a “wet” atmosphere (approximately 90 % humidit
32、y), a desiccator may be used with an open vessel at the bottom containing a mixture of 33 parts by mass of glycerol and 67 parts by mass of water. The relative density of this mixture will be 1,080 6 at 20 C. The relative humidity above its surface will be approximately 90 % at 23 C.5.4 Polyethylene
33、 gloves, or other suitable equipment to prevent direct contact with the test surfaces.5.5 Magnifying glass, of magnification 3 to 5.5.6 Weights, with flat bottoms.6 Test metalsThe test metals used shall be those specified in the relevant material specification. If the metals are not so specified, th
34、ey shall be cut from commercial flat sheet or bar, preferably complying with a national standard, and agreed between the interested parties.NOTE The specific grades of metal specified in previous editions of this International Standard are no longer available. Aluminium and mild steel are most commo
35、nly used but copper, brass or other metal might be appropriate for particular applications2 ISO 2015 All rights reservedBS ISO 6505:2015ISO 6505:2015(E)Dimensions in millimetres1251235746894Key1 10 kg weight 4 rubber test piece 7 positions of clamps2 screw clamp 5 metal test strips 8 support base3 l
36、ocating pin 6 bottom metal test strip 9 guides for 10 kg weightFigure 1 Typical support jigThe metal test strips shall have a thickness sufficient to withstand the clamping force without bending. If only thin foil is available, it shall be supported by a rigid backing material previously shown to be
37、 non-corrosive to the test metals.The test metals shall be in the form of strips with dimensions as given in Table 1: ISO 2015 All rights reserved 3BS ISO 6505:2015ISO 6505:2015(E)Table 1 Dimensions of metal test stripsWidthmmLength (min.)mmComments25 1 100For use with square test pieces measuring 2
38、0 mm 20 mm50 1 100For use with O-rings with an outer diame-ter of 18 mm to 45 mm7 CalibrationThe requirements for calibration of the test apparatus are given in Annex A8 Test pieces8.1 Preparation8.1.1 Square test piecesSquare test pieces shall be (20 0,5) mm (20 0,5) mm and preferably with a thickn
39、ess of (2,0 0,2) mm. They shall be cut or punched from sheet or from the product under evaluation in accordance with ISO 23529.8.1.2 O-ring test piecesO-ring test pieces shall have a cross-sectional diameter of (3,55 0,1) mm. The outer diameter of the test piece shall be min. 18 mm and max. 45 mm.8.
40、2 NumberAt least two test pieces shall be used for each test.8.3 Time-interval between forming the material and testingThe time-interval between forming the material and testing shall be in accordance with ISO 23529.8.4 StorageSamples and test pieces shall be protected from light as completely as po
41、ssible during the interval between forming and testing.9 Test conditions9.1 TemperatureThe test temperature shall be selected from the list in ISO 23529.4 ISO 2015 All rights reservedBS ISO 6505:2015ISO 6505:2015(E)9.2 Test periodThe duration of the test shall be selected from the following: 2420h;
42、7220h; (96 2) h; (120 2) h; (168 2) h and multiples of 7 days.NOTE The test period of 120 h has been included alongside periods from ISO 23529 because it is used in material specifications, especially for testing in a wet atmosphere.9.3 HumidityIn terms of humidity, the atmosphere shall bea) either
43、a dry atmosphere having a relative humidity of less than 10 %, orb) a wet atmosphere having a relative humidity of (90 5) %.NOTE This test is commonly carried out at low humidity to ensure that corrosion resulting from causes other than those due to the rubber is minimized.10 Procedure10.1 Precautio
44、nIn all operations, it is essential that the rubber test pieces and the metal test strips are handled only by means of the polyethylene gloves or other protective equipment (see 5.4). This precaution is essential in order to minimize surface contamination of the test piece and metal strips.10.2 Prep
45、aration of rubber test pieces for testingClean all the surfaces of the rubber test pieces with cotton wool pads moistened with a suitable solvent (see 4.2) to remove surface contamination (by mould release agents, for example). The solvent to be used will depend on the rubber under test; it shall no
46、t have any deleterious effects on the rubber (e.g. acetone should not be used for nitrile rubber; isopropyl alcohol is preferred for this material).Allow the test pieces to dry in air. When dry, store the test pieces, unless otherwise specified, in a clean desiccator over silica gel at standard labo
47、ratory temperature (see ISO 23529) for at least 24 h immediately prior to testing.Since cleaning of the test pieces might also remove from the rubber surface materials such as waxes, antiozonants, etc., which would normally be expected to affect the adhesion and corrosion properties of the rubber, a
48、llow sufficient time in the desiccator for the re-formation of the “original” surface before testing.10.3 Number of metal test stripsFor each test, use two suitable metal test strips as specified in the material specification or selected from the metals specified in Clause 6.For tests in a wet atmos
49、phere, use only one type of metal in the construction of the test piece “sandwich” in order to avoid electrolytic effects.10.4 Preparation of surfaces of metal test stripsThoroughly scour the test surfaces of the metal test strips using a slurry of pumice powder (4.3) in water applied with a cotton wool pad until a matt surface is obtained. Thoroughly rinse the metal strips with water (4.4) and then with acetone (4.1) and finally dry in air. If the prepared metal test strips are not
