1、BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06Corrosion of metals and alloys - Accelerated cyclic test with exposure to acidified salt spray, dry and wet conditionsBS EN ISO 16151:2018National forewordThis British Standard is the UK implementation of EN ISO 16151:2
2、018. It is identical to ISO 16151:2018. It supersedes BS EN ISO 16151:2008, which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee ISE/NFE/8, Corrosion of metals and alloys.A list of organizations represented on this committee can be obtained on request to it
3、s secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2018 Published by BSI Standards Limited 2018ISBN 978 0 580 95327 9ICS 77.060Compliance with a British Standard can
4、not confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 31 July 2018.Amendments/corrigenda issued since publicationDate Text affectedBRITISH STANDARDBS EN ISO 16151:2018EUROPEAN STANDARDNORME EUROPENNEEUROPI
5、SCHE NORMEN ISO 16151July 2018ICS 77.060 Supersedes EN ISO 16151:2008EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGCEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2018 CEN Ref. No. EN ISO 16151:2018: EAll rights of exploitation in
6、any form and by any means reserved worldwide for CEN national MembersCorrosion of metals and alloys - Accelerated cyclic test with exposure to acidified salt spray, dry and wet conditions (ISO 16151:2018)Corrosion des mtaux et alliages - Essais cycliques acclrs avec exposition au brouillard salin ac
7、idifi, en conditions sches et en conditions humides (ISO 16151:2018)Korrosion von Metallen und Legierungen - Schnellprfungen unter zyklisch wechselnder Beanspruchung mit saurem Salzsprhnebel, “trockenen“ und “feuchten“ Bedingungen (ISO 16151:2018)This European Standard was approved by CEN on 30 May
8、2018.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained
9、 on application to the CEN-CENELEC Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CEN
10、ELEC Management Centre has the same status as the official versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Ital
11、y, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.English VersionEN ISO 16151:2018 (E)European forewordThis document (EN ISO 16151:2018) has been prepared by Technical Committee I
12、SO/TC 156 “Corrosion of metals and alloys“ in collaboration with Technical Committee CEN/TC 262 “Metallic and other inorganic coatings, including for corrosion protection and corrosion testing of metals and alloys” the secretariat of which is held by BSI.This European Standard shall be given the sta
13、tus of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2019, and conflicting national standards shall be withdrawn at the latest by January 2019.Attention is drawn to the possibility that some of the elements of this document may be the sub
14、ject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.This document supersedes EN ISO 16151:2008.According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European St
15、andard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Sl
16、ovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom.Endorsement noticeThe text of ISO 16151:2018 has been approved by CEN as EN ISO 16151:2018 without any modification.iiBS EN ISO 16151:2018ISO 16151:2018Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definition
17、s . 14 Test solution 24.1 General . 24.2 Method A 24.2.1 Neutral sodium chloride solution . 24.2.2 Preparation of the acidified-salt solution . 24.3 Method B 34.3.1 Preparation of the mixed salt solution 34.3.2 Preparation of the acidic solution . 34.3.3 Preparation of the acidified-salt solution .
18、35 Apparatus . 35.1 Component protection. 35.2 Test cabinet. . 45.3 Humidity and temperature control. 45.4 Spraying device. . 45.5 Air saturator. . 45.6 Collecting devices. 45.7 Air dryer. . 55.8 Exhaust system. 55.9 Drain system. 56 Test specimens 57 Arrangement of the test specimen . 58 Operating
19、condition 69 Continuity of tests . 810 Duration of the tests . 811 Treatment of test specimens after test 811.1 General . 811.2 Non-organic coated test specimens: metallic and/or inorganic coated 811.3 Organic coated test specimens 811.3.1 Scribed organic coated test specimens . 811.3.2 Organic coat
20、ed but not scribed test specimens . 912 Evaluation of results . 913 Test report . 9Annex A (informative) Relationship between amounts of acidic stock solution added to mixed salt solution and pH of the resulting acidified-salt solution .11Annex B (informative) Typical apparatus for accelerated cycli
21、c tests with exposure to acidified salt spray, dry and wet conditions 12Annex C (informative) Method for evaluation of the corrosivity of the apparatus .14Annex D (normative) Preparation of test specimens with organic coatings for testing 16Annex E (normative) Required supplementary information for
22、testing test specimens with organic coatings .17Bibliography .18 ISO 2018 All rights reserved iiiContents PageBS EN ISO 16151:2018ISO 16151:2018ForewordISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of pre
23、paring 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, governmental and non-governmental, in
24、 liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC
25、 Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. This document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).Attention is drawn to the possibility th
26、at 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. 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 d
27、eclarations 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 an endorsement.For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and expressions related to conformit
28、y assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following URL: www.iso.org/iso/foreword.html.This document was prepared by Technical Committee ISO/TC 156, Corrosion of metals and alloys.This s
29、econd edition cancels and replaces the first edition (ISO 16151:2005), which has been technically revised. The main technical changes are as follows: harmonization with ISO 9227; terms and definitions clause has been added.iv ISO 2018 All rights reservedBS EN ISO 16151:2018ISO 16151:2018Introduction
30、Corrosion of metallic materials, with or without corrosion protection, is influenced by many environmental factors, the importance of which may vary with the type of metallic material and with the type of environment. It is impossible, therefore, to design accelerated laboratory corrosion tests in s
31、uch a way that all environmental factors influencing resistance to corrosion are taken into account. Laboratory tests are, therefore, designed to simulate the effects of the most important factors, which enhance the corrosion of metallic materials.The accelerated corrosion-test methods described in
32、this document are designed to simulate and enhance the environmental influence on a metallic material to outdoor climates, where exposure to acid rain and to salt-contaminated conditions occur and may promote corrosion. It has been prepared by reference to technical papers and reports (see the Bibli
33、ography).The test methods involve cyclic exposure of test specimens to a mist of acidified-salt solution, to drying conditions, and to periods of high humidity. However, the methods are mainly intended for comparative testing and the results obtained do not permit far-reaching conclusions on the cor
34、rosion resistance of the tested metallic material under the whole range of environmental conditions in which they may be used. Nevertheless, the methods provide valuable information on the relative performance of materials exposed to salt and/or acid rain environments similar to those employed in th
35、e test. ISO 2018 All rights reserved vBS EN ISO 16151:2018This page deliberately left blankCorrosion of metals and alloys - Accelerated cyclic test with exposure to acidified salt spray, dry and wet conditionsWARNING This document may involve hazardous materials, operations and equipment. It does no
36、t purport to address all of the safety problems associated with its use. It is the responsibility of the user of this document to establish appropriate safety and health practices.1 ScopeThis document specifies two accelerated corrosion-test procedures, Methods A and B, for the comparative evaluatio
37、n of metallic materials with or without permanent corrosion protection or temporary corrosion protection in outdoor salt and/or acid rain environments. It also specifies the apparatus used. The two tests involve cyclic exposure of the specimens to acidified salt spray, “dry” and “wet” conditions.The
38、 particular advantages of the two tests over conventional accelerated tests, such as the neutral salt spray (NSS) test as specified in ISO 9227 lie in their better ability to reproduce the corrosion that occurs in outdoor salt and/or acid rain environments. They are also useful for evaluating cosmet
39、ic corrosion.Method A is applicable to metals and their alloys, metallic coatings (cathodic), anodic oxide coatings, and organic coatings on metallic materials.Method B is applicable to steel coated with anodic coatings, and steel coated with anodic coatings covered with conversion coatings.2 Normat
40、ive referencesThe following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amen
41、dments) applies.ISO 1514, Paints and varnishes Standard panels for testingISO 2808, Paints and varnishes Determination of film thicknessISO 4623-2:2016, Paints and varnishes Determination of resistance to filiform corrosion Part 2: Aluminium substratesISO 8044, Corrosion of metals and alloys Basic t
42、erms and definitionsISO 17872, Paints and varnishes Guidelines for the introduction of scribe marks through coatings on metallic panels for corrosion testing3 Terms and definitionsFor the purposes of this document, the terms and definitions given in ISO 8044 and the following apply.INTERNATIONAL STA
43、NDARD ISO 16151:2018 ISO 2018 All rights reserved 1BS EN ISO 16151:2018ISO 16151:2018ISO and IEC maintain terminological databases for use in standardization at the following addresses: ISO Online browsing platform: available at http:/www.iso.org/obp IEC Electropedia: available at http:/www.electrop
44、edia.org/3.1reference materialmaterial with known test performance3.2reference specimenportion of the reference material (3.1) that is to be exposed with the intention to check the reproducibility and repeatability of the test results for the test cabinet in use3.3test specimenspecific portion of th
45、e samples upon which the testing is to be performed3.4substitute specimenspecimen made of inert materials (such as plastic or glass) used for the substitute of a test specimen (3.3)4 Test solution4.1 GeneralInstructions for the preparation and use of the solutions used in Methods A and B are given i
46、n 4.2 and 4.3.4.2 Method A4.2.1 Neutral sodium chloride solutionA sufficient mass of sodium chloride shall be dissolved in distilled or deionized water, with a conductivity not higher than 20 S/cm at 25 C 2 C, to produce a concentration of 50 g/l 5 g/l. The specific gravity range for a 50 g/l 5 g/l
47、solution shall be 1,029 to 1,036 at 25 C.The sodium chloride shall not contain a mass fraction of the heavy metals of copper (Cu), nickel (Ni) and lead (Pb) in total more than 0,005 %. It shall not contain a mass fraction of sodium iodide more than 0,1 % and a mass fraction of total impurities more
48、than 0,5 %, calculated for dry salt.NOTE Sodium chloride with anti-caking agents can act as corrosion inhibitors or accelerators. A useful sodium chloride salt grade is a grade named Ph. Eur/USP or JIS, ACS.4.2.2 Preparation of the acidified-salt solutionThe pH of the solution shall be adjusted to a
49、 value of 3,5 0,1 at 25 C 2 C, by adding the following reagents to 10 l of the prepared neutral sodium chloride solution in 4.2.1 as follows: 12 ml of nitric acid (HNO3, = 1,42 g/ml); 17,3 ml of sulfuric acid (H2SO4, = 1,84 g/ml); a sufficient quantity of 10 % mass fraction of sodium hydroxide (NaOH) solution, to adjust the pH of the solution to 3,5 0,1 (about 300 ml will be required).2 ISO 2018 All rights reservedBS EN ISO 16151:2018ISO 16151:20184.3 Method B4.3.1 Preparation of the mixed salt solutionT
