1、June 2015Translation by DIN-Sprachendienst.English price group 9No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 37.
2、020!%C;k“2322472www.din.deDDIN ISO 9022-4Optics and photonics Environmental test methods Part 4: Salt mist (ISO 9022-4:2014),English translation of DIN ISO 9022-4:2015-06Optik und Photonik Umweltprfverfahren Teil 4: Salzsprhnebel (ISO 9022-4:2014),Englische bersetzung von DIN ISO 9022-4:2015-06Optiq
3、ue et photonique Mthodes dessais denvironnement Partie 4: Brouillard salin (ISO 9022-4:2014),Traduction anglaise de DIN ISO 9022-4:2015-06SupersedesDIN ISO 9022-4:2003-01www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 14 pages05.15 2DIN
4、 ISO 9022-4:2015-06A comma is used as the decimal marker. Contents Page National foreword .3 National Annex NA (informative) Bibliography .4 Introduction .5 1 Scope .6 2 Normative references .6 3 General information and test conditions .6 3.1 Limitations of testing .6 3.2 Specimens .7 3.3 Apparatus
5、(see Figure 2) .8 3.4 Reagents . 10 3.5 Salt spray test conditions . 10 3.6 Test interruption and opening of test chamber . 11 4 Conditioning method 40: Salt mist . 11 5 Procedure 11 5.1 General 11 5.2 Preconditioning (specimen preparation) . 11 5.3 Recovery . 12 5.4 Evaluation . 12 6 Environmental
6、test code . 12 7 Specification 12 Annex A (informative) Explanatory notes . 13 National foreword This document (ISO 9022-4:2015) has been prepared by Technical Committee ISO/TC 172 “Optics and photonics”, Subcommittee SC 1 “Fundamental standards” (Secretariat: DIN, Germany). The responsible German b
7、ody involved in its preparation was the DIN-Normenausschuss Feinmechanik und Optik (DIN Standards Committee Optics and Precision Mechanics), Working Committee NA 027-01-02 AA Grundnormen der Optik, Working Group NA 027-01-02-03 AK Umweltbedingungen und -prfungen fr optische Gerte. DIN ISO 9022 consi
8、sts of the following parts, under the general title Optics and photonics Environmental test methods: Part 1: Definitions, extent of testing Part 2: Cold, heat and humidity Part 3: Mechanical stress Part 4: Salt mist Part 6: Dust Part 7: Resistance to drip or rain Part 8: High internal pressure, low
9、internal pressure, immersion Part 9: Solar radiation and weathering Part 11: Mould growth Part 12: Contamination Part 14: Dew, hoarfrost, ice Part 17: Combined contamination, solar radiation Part 20: Humid atmosphere containing sulfur dioxide or hydrogen sulfide Part 22: Combined cold, dry heat or t
10、emperature change with bump or random vibration Part 23: Low pressure combined with cold, ambient temperature and dry and damp heat The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 9022-1 DIN ISO 9022-1 Amendments This standard differs f
11、rom DIN ISO 9022-4:2003-01 as follows: a) the standard has been editorially updated; b) the text of International Standard ISO 9022-4:2014 has been adopted in its entirety. Previous editions DIN 58390-4: 1976-05, 1985-06 DIN ISO 9022-4: 1999-05, 2003-01 3DIN ISO 9022-4:2015-06National Annex NA (info
12、rmative) Bibliography DIN ISO 9022-1, Optics and photonics Environmental test methods Part 1: Definitions, extent of testing 4DIN ISO 9022-4:2015-06Optics and photonics Environmental test methods Part 4: Salt mist IntroductionOptical instruments are affected during their use by a number of different
13、 environmental parameters which they are required to resist without significant reduction in performance and to remain within defined specifications.The type and severity of these parameters depend on the conditions of use of the instrument (for example, in the laboratory or workshop) and on its geo
14、graphical location. The environmental effects on optical instrument performance in the tropics and subtropics are totally different from those found when they are used in arctic regions. Individual parameters cause a variety of different and overlapping effects on instrument performance.The manufact
15、urer attempts to ensure, and the user naturally expects, that instruments will resist the likely rigours of their environment throughout their life. This expectation can be assessed by exposure of the instrument to a range of simulated environmental parameters under controlled laboratory conditions.
16、 The severity of these conditions is often increased to obtain meaningful results in a relatively short period of time.In order to allow assessment and comparison of the response of optical instruments to appropriate environmental conditions, ISO 9022 contains details of a number of laboratory tests
17、 which reliably simulate a variety of different environments. The tests are based largely on IEC standards, modified where necessary to take into account features special to optical instruments.It should be noted that, as a result of continuous progress in all fields, optical instruments are no long
18、er only precision-engineered optical products, but, depending on their range of application, also contain additional assemblies from other fields. For this reason, the principal function of the instruments shall be assessed to determine which International Standard should be used for testing. If the
19、 optical function is of primary importance, then ISO 9022 is applicable, but if other functions take precedence, then the appropriate International Standard in the field concerned should be applied. Cases can arise where application of both ISO 9022 and other appropriate International Standards will
20、 be necessary.5DIN ISO 9022-4:2015-061 ScopeThis part of ISO 9022 specifies the methods relating to the environmental tests of optical instruments including additional assemblies from other fields (e.g. mechanical, chemical, and electronic devices), under equivalent conditions, for their ability to
21、resist the influence of salt mist.Exposure to salt mist mainly results in the corrosion of metals. Effects might also occur by way of clogging or binding of moving parts.The purpose of the testing is to assess, as early as possible, the ability of the instrument, and particularly of the surfaces and
22、 protective coatings of the instrument, to resist the effects of a salt atmosphere.Normally, representative samples or complete small units are used for testing. Complete large instruments or assemblies are only tested as specified in this part of ISO 9022 in exceptional cases.2 Normative references
23、The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.ISO 9022
24、-1, Optics and photonics Environmental test methods Part 1: Definitions, extent of testing3 General information and test conditions3.1 Limitations of testing3.1.1 GeneralThe aim of salt mist testing is unlikely to be achieved, unless the deficiencies and limitations of such testing as detailed in 3.
25、1.2 and 3.1.3 are fully recognized.3.1.2 SuitabilitySalt mist testing is considered suitable fora) the assessment of the resistance of optical and other functional layers,b) the assessment of the anti-corrosion effect of metallic and non-metallic coatings, andc) the early detection of the unacceptab
26、ility of material combinations.6DIN ISO 9022-4:2015-063.1.3 UnsuitabilitySalt mist tests as specified in this part of ISO 9022 shall not be performed in the following cases:a) as a general corrosion test, as no verified data are available showing that there is a direct relationship between salt mist
27、 corrosion and corrosion caused by other attacking corrosive media or environments;b) on separate components or assemblies that are used only in assembled configurations or any other configurations protected from corrosion;c) as a true duplication of natural marine environment.NOTE Generally, the sa
28、lt mist test is not reliable for comparing the corrosion resistance of different materials or the anticorrosive effect of coatings exposed to varying climatic conditions, nor is it suitable for predicting the service life of such materials or coatings. Some idea of the service life of different spec
29、imens of identical or closely related metals, or of different specimens of identical or comparable protective coating combinations, can be gained by the salt mist test provided that, by correlating field service test data with laboratory tests, such relationships can be demonstrated as exist in the
30、case of aluminium alloys. Such correlation tests are essential if data are required on the accelerating effect (if any) of laboratory testing as compared to performance under natural service conditions.3.2 SpecimensSpecimens shall be made of the basic materials used for the instrument under test; co
31、atings (finishing coatings, protective coatings, thin films on optical parts), if any, shall be of the same structure as those used for the instrument components and surfaces to be assessed.Specimens for testing metallic and non-metallic coatings shall preferably be metal sheets (sample sheets) as s
32、hown in Figure 1. The coating under test shall completely cover the sample sheet, especially the outer edges and edges of holes. Where this is not feasible, exposed metal edges shall be protected by a means that does not affect the coating under test. Marking of the sample sheets shall not damage th
33、e coating to be tested (e. g. punch-marking shall be carried out prior to applying the coating).Dimensions in millimetresaMarking area (on the back).Figure 1 Sample sheetWhere the instruments or instrument components to be assessed are made of cast material, the use of specimens originating from the
34、 same batch shall be agreed upon and documented in the test report.In the test of optical and other functional layers, specimens shall be used as test-pieces which consist of the same basic materials as the original components.7DIN ISO 9022-4:2015-06Complete large instruments and assemblies, or sepa
35、rate components that are used in assembled configurations only, shall not be tested in accordance with this part of ISO 9022, unless as an exception. If necessary, essential areas of such specimens and of specimens other than sample sheets (e. g. electrically insulated components, open assemblies) m
36、ay be used for assessment by agreement between the parties concerned.3.3 Apparatus (see Figure 2)The test apparatus essentially comprises of the components described below. All parts of the test apparatus that come into contact with the salt mist or the test solution shall be made of a material that
37、 will not affect the corrosiveness of the test solution or the salt mist.3.3.1 Test chamber, used for salt mist tests including a heated exposure chamber providing pressure balance and measuring/controlling means to adjust and maintain the test temperature to 35 C 2 C within the closed chamber. The
38、test chamber shall have a volume of not less than 400 l; it shall be constructed so as to prevent condensate dripping from overhead and from the sidewalls onto the specimens. The dripping of condensate from overhead can be avoided by inclining the exposure chamber at least 30 to the horizontal.Test
39、solution, once atomized, shall not return into the salt solution reservoir.The exposure zone is that part of the test chamber which is not covered by the cone-shaped spray, and where uniform distribution of the mist can be demonstrated in accordance with 3.5.2.3.3.2 Atomizing nozzles, made of polyme
40、thylmethacrylate or polyvinylchloride and having an opening of 1 mm in diameter. Their dispersion angle is approximately 30 and they are operated at a positive pressure of between 70 kPa and 140 kPa, and a suction level of 200 mm to 500 mm. Salt mist has been proven to be best produced by self-primi
41、ng compressed air nozzles without a regulating or quick-cleaning needle. It is useful to provide a means for measuring and controlling the flow of fluid (see Figure 2); serving to adjust and control the amount of salt solution to be atomized so that the condensate collected per hour in the exposure
42、chamber is kept within the acceptable tolerances specified in 3.5.2.The spray shall not impinge upon the specimens. It may therefore be necessary to direct the spray against one of the chamber walls (see Figure 2, example 2) or, if the nozzle is installed at the bottom of the chamber, to provide a g
43、uide tube (see Figure 2, example 1).The number and location of the atomizing nozzles shall be selected so that the requirements for the available exposure space as specified in 3.5.2 are met.Other types of nozzles may be used provided that the materials of which they are made of do not affect the co
44、rrosiveness of the salt mist and that the salt mist produced by such nozzles meets the requirements specified in 3.5.2.3.3.3 Levelling receptacle and supply line, for the salt solution to be atomized, designated, and constructed so that the suction level remains constant throughout the duration of t
45、he test.3.3.4 Airline including oil and solid matter trap, and humidifier, designed and constructed so that the compressed air remains saturated with water at the required temperature throughout the duration of the test. A pressure gauge for measuring the air pressure at the nozzle shall be installe
46、d in the airline running from the humidifier to the exposure chamber.3.3.5 Racks, permitting the arrangement of the specimens within the available exposure space so that they do not come into contact with each other.Major surfaces of representative samples and, if possible, of assemblies shall be in
47、clined at least 60 to the horizontal.8DIN ISO 9022-4:2015-06Key1 chamber ventilation2 exposure chamber3 fluid flow measuring and controlling device4 humidifier5 example 1: guide tube around atomizing nozzle6 example 2: atomizing nozzle directed against chamber wall7 pressure balance8 atomizing nozzl
48、e9 air inlet control valve10 compressed air, free from oil and solid matter11 siphon12 suction level 200 mm to 500 mm13 pressure gauge14 filtered sodium chloride solution15 sodium chloride solution reservoir and liquid-level controllerFigure 2 Schematic representation of test apparatus, showing two
49、different locations of atomizing nozzleSample sheets shall be placed on edge at an angle of 60 to 75 to the horizontal. Unless otherwise specified in the relevant specification, instruments and, if required, assemblies shall be installed in the exposure chamber in their operating position.9DIN ISO 9022-4:2015-06The specimens shall be arranged in the exposure chamber in such a manner that they do not overlap or come into contact with each oth
