1、BRITISH STANDARD AUTOMOBILE SERIES BS AU 180-5:1983 ISO6314:1980 Brake linings Part 5: Method for determining resistance to water, saline solution, oiland brake fluid of brake lining material ISO title: Road vehicles Brake linings Resistance to water, saline solution, oil and brake fluid Test proced
2、ure UDC 629.11-597.6:620.1BSAU180-5:1983 This BritishStandard, having been prepared under the directionof the Automobile Standards Committee, was published under the authority ofthe Board of BSI and comesintoeffect on 31January1983 BSI02-2000 The following BSI references relate to the work on this s
3、tandard: Committee reference AUE/11 Draft for comment78/80970DC ISBN 0 580 13139 4 Committee responsible for this BritishStandard This BritishStandard was published under the direction of the Automobile Standards Committee AUE/-. Its preparation was entrusted to Technical Committee AUE/11 upon which
4、 the following bodies were represented: Association of Hydraulic Equipment Manufacturers Automobile Association British Friction Materials Council Department of Transport London Transport Executive Motor Industry Research Association National Caravan Council Limited Society of Motor Manufacturers an
5、d Traders Limited Transport and General Workers Union Amendments issued since publication Amd. No. Date of issue CommentsBSAU180-5:1983 BSI 02-2000 i Contents Page Committee responsible Inside front cover National foreword ii 0 Introduction 1 1 Scope and field of application 1 2 References 1 3 Defin
6、ition 1 4 Test apparatus 1 5 Sampling and preparation 1 6 Test procedure 1 7 Evaluation of results 2 Publications referred to Inside back coverBSAU180-5:1983 ii BSI 02-2000 National foreword This BritishStandard has been prepared under the direction of the Automobile Standards Committee and is ident
7、ical with ISO6314:1980 “Road vehicles Brake linings Resistance to water, saline solution, oil and brake fluid Testprocedure” published by the International Organization for Standardization(ISO). Terminology and conventions. The text of the International Standard has been approved as suitable for pub
8、lication as a BritishStandard without deviation. Some terminology and certain conventions are not identical with those used in BritishStandards; attention is especially drawn to the following. The comma has been used as a decimal marker. In British Standards it is current practice to use a full poin
9、t on the baseline as the decimal marker. Wherever the words “International Standard” appear, referring to this standard, they should be read as “BritishStandard”. The Technical Committee has reviewed the provisions of ISO611 and ISO6312, to which reference is made in the text, and has decided that t
10、hey are acceptable for use in conjunction with this standard. A related BritishStandard to ISO6312:1981 is BS AU180 “Brake linings” Part3 “Method for measurement ofshear strength of disc brake pad and drum brake shoe assemblies”. At present there is no corresponding BritishStandard for ISO611. Howev
11、er, it isintended to publish a related standard at a future date. NOTETextual error. Footnote 1) is not applicable. ISO 1817-1975 is in course of revision. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their
12、correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International Standard Corresponding BritishStandard ISO1817:1975 BS903 Methods of testing vulcanized rubber Part A16:1971 The resistance of vulcanized rubber toliquids
13、 (Technically equivalent) ISO4926:1978 BS AU174 Hydraulic brake systems, using non-petroleum base brake fluids, for road vehicles Part 1:1979 Specification for non-petroleum base referencefluids (Identical) ISO6311:1980 BS AU180 Brake linings Part 2:1982 Method for measurement of internal shearstren
14、gth of lining material (Identical) Summary of pages This document comprises a front cover, an inside front cover, pagesi andii, pages1 and2, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in
15、the amendment table on the inside front cover.BSAU180-5:1983 BSI 02-2000 1 0 Introduction In a variety of circumstances it is not unknown for automotive brake linings to become contaminated by water from rain, or salt from sea spray, or oil from axle seal failure or fluid from a wheel cylinderleak.
16、Such contamination could cause changes in mechanical strength and or physical shape of a brake lining and thereby reduce its functional capability. 1 Scope and field of application This International Standard specifies a laboratory method for exposing samples to detrimental environments, measuring t
17、he effect on strength and shape and comparing the results with those from uncontaminated samples. It applies to drum brake linings and disc brake pads being of organic content and intended for service on road vehicles. 2 References ISO611, Braking of motor vehicle and their trailers Terminology. ISO
18、1817, Vulcanized rubbers Resistance to liquids Method of test. ISO4926, Road vehicles Hydraulic brake systems Non-petroleum base reference fluids. ISO6311, Road vehicles Brake linings Internal shear strength of lining materials Testprocedure. ISO6312, Road vehicles Brake linings Shear strength of di
19、sc brake pad and drum brake shoe assemblies Test procedure. 3 Definition For the purpose of this International Standard, the following definition applies: resistance the ability to resist a change in thickness or shear strength due to contamination expressed as percentage of the figures for similar
20、uncontaminated specimens 4 Test apparatus The test apparatus shall consist of: a) containers, for fluids and immersed samples; b) ball-ended micrometer, for measuring sample thickness; c) a material shear test rig, as described inISO6311 or ISO6312. 5 Sampling and preparation Take at random, from th
21、e factory output, a minimum of fifteen representative linings or pads of nominally the same shape, size and material. Prepare samples in accordance with the requirements of ISO6311 or ISO6312, whichever appropriate for the samples. Mark all samples with a similar pattern of five selected spots for m
22、easurements of thickness. Mark each sample with a distinguishing identity. Measure and record the thickness to a tolerance of0,01mm at each spot on each sample, taking care not to indent the samples. Place the test samples at random into five groups of three and keep these groups apart. 6 Test proce
23、dure Test to be performed at ambient temperature, which should be noted. In order to present a maximum surface to the active agents, the samples shall be stored in a vertical position during the contamination period, without touching each other. 6.1 Group I Store the three samples in normal room atm
24、osphere for7 days. Measure and record thickness at each spot immediately prior to shearing. Shear test all samples in accordance with ISO6311 or ISO6312 and record the figures. 6.2 Group II Store the three samples in a bath of water for7days. Remove from bath and dry surfaces with absorbentpaper. Me
25、asure and record thickness at each spot within10min of drying and immediately prior to shearing. Shear test all samples in accordance with ISO6311 or ISO6312 and record the figures. 6.3 Group III Immerse the three samples in a bath containing a solution of sodium chloride,100g/l, for7days. Remove fr
26、om the bath and dry the surfaces with absorbent paper. Measure and record thickness at each spot within10min of drying and immediately prior to shearing. Shear test all samples in accordance with ISO6311 or ISO6312 and record the figures.BSAU180-5:1983 2 BSI 02-2000 6.4 Group IV Immerse the three sa
27、mples in a bath of lubricating oil, conforming to specification oil no.2 in the Annexof ISO1817, for48h. Remove from bath and dry surfaces with absorbentpaper. Measure and record thickness at each spot within10min of drying and immediately prior toshearing. Shear test all samples in acordance with I
28、SO6311 or ISO6312 and record the figures. 6.5 Group V Immerse samples in a bath of brake fluid conforming to specification of compatibility fluid inISO4926, for48h. Remove from bath and dry surfaces with absorbentpaper. Measure and record thickness at each spot within10min of drying and immediately
29、prior toshearing. Shear test all samples in accordance with ISO6311 or ISO6312 and record the figures. 7 Evaluation of results For each sample and at each stage of thickness measurement, average the five readings and record. Change of thickness by contamination is expressed as the difference in aver
30、age thickness for each sample before and after contamination. The figures for the three samples may be averaged to give a figure for the product. Change of shear strength by contamination is expressed as the difference between the average of the contaminated samples and that for the uncontaminated s
31、amples. This may be given as a percentage of the average value for uncontaminated samples.BSAU180-5:1983 BSI 02-2000 Publications referred to Seenational foreword.BS AU 180-5:1983 ISO6314:1980 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national bod
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