BS EN ISO 14916-2017 Thermal spraying Determination of tensile adhesive strength《热喷涂层的试验 抗拉胶粘强度的测定》.pdf

1、BS EN ISO 14916:2017Thermal spraying Determination of tensileadhesive strength (ISO14916:2017)BSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN ISO 14916:2017 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO14916:2017. It

2、supersedes BS EN 582:1994 which is withdrawn.The UK participationinitspreparation wasentrusted to TechnicalCommittee STI/40,Thermal sprayingandthermally sprayed coatings.Alistoforganizations represented on this committeecanbeobtainedonrequest to itssecretary.Thispublicationdoes not purport to includ

3、e allthe necessaryprovisions of a contract. Usersare responsibleforitscorrectapplication. The British Standards Institution 2017. Published by BSI StandardsLimited 2017ISBN978 0580 83351 9ICS25.220.20Compliancewitha British Standard cannot confer immunityfromlegal obligations.ThisBritish Standard wa

4、spublishedunder the authority of theStandardsPolicy and StrategyCommittee on 31March2017.Amendments/corrigenda issued since publicationDate TextaffectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 14916 March 2017 ICS 25.220.20 Supersedes EN 582:1993English Version Thermal spraying - Det

5、ermination of tensile adhesive strength (ISO 14916:2017) Projection thermique - Mesure de ladhrence par essais de traction (ISO 14916:2017) Thermisches Spritzen - Ermittlung der Haftzugfestigkeit (ISO 14916:2017) This European Standard was approved by CEN on 8 March 2017. CEN members are bound to co

6、mply 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 on application to the CEN-CENEL

7、EC 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-CENELEC Management Centre has the

8、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, Italy, Latvia, Lithuania, Luxembou

9、rg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 B

10、russels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 14916:2017 EBS EN ISO 14916:2017EN ISO 14916:2017 (E) 3 European foreword This document (EN ISO 14916:2017) has been prepared by Technical Committee ISO/TC 107 “Metal

11、lic and other inorganic coatings“ in collaboration with Technical Committee CEN/TC 240 “Thermal spraying and thermally sprayed coatings” the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of an identical text or by

12、endorsement, at the latest by September 2017, and conflicting national standards shall be withdrawn at the latest by September 2017. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible

13、for identifying any or all such patent rights. This document supersedes EN 582:1993. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Re

14、public, 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, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kin

15、gdom. Endorsement notice The text of ISO 14916:2017 has been approved by CEN as EN ISO 14916:2017 without any modification. BS EN ISO 14916:2017ISO 14916:2017(E)Foreword ivIntroduction v1 Scope . 12 Normative references 13 Terms and definitions . 14 Principles . 25 Equipment for testing and measurin

16、g and auxiliary equipment 35.1 Test instruments 35.2 Measurement instrument 35.3 Specimen fixing device for bonding of the tensile adhesive specimen . 46 Specimens 46.1 Shape of specimens . 46.2 Material of the specimen 66.3 Preparing the substrate and loading blocks 66.4 Preparing and spraying of t

17、he specimen 86.5 Manufacture of the specimens for tensile testing . 96.5.1 Machining of the coated substrate block (or test disc) and preparation for bonding 96.5.2 Gluing the specimen 96.5.3 Bonding agent 96.6 Reference specimen . 106.7 Number of specimens to be tested . 107 Applying the testing .1

18、08 Measurement readings and evaluation .119 Test report Documentation .1210 Possible sources of fault when preparing the specimens and on testing .13Annex A (informative) Work instructions for gluing 14Annex B (informative) Recommendations for further auxiliary equipment .17Annex C (informative) Fun

19、ction areas on the tensile adhesive specimen and possibilities of fracture locations according to ASTM C633-13 .21Annex D (informative) Record for the applied tensile adhesive test according to this document 22Bibliography .26 ISO 2017 All rights reserved iiiContents PageBS EN ISO 14916:2017ISO 1491

20、6:2017(E)ForewordISO (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 w

21、hich a technical committee 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

22、 matters of electrotechnical 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. Th

23、is 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 that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any

24、 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 declarations received (see www .iso .org/ patents).Any trade name used in this document is information given for the convenience of

25、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 conformity assessment, as well as information about ISOs adherence to the World Trade Organization (WTO) principles in the Technical Bar

26、riers to Trade (TBT) see the following URL: www .iso .org/ iso/ foreword .html.This document was prepared by Technical Committee ISO/TC 107, Metallic and other inorganic coatings.This second edition cancels and replaces the first edition (ISO 14916:1999), which has been technically revised.iv ISO 20

27、17 All rights reservedBS EN ISO 14916:2017ISO 14916:2017(E)IntroductionThe determination of the tensile adhesive strength of a thermal spray coating can play an important role in the quality control of production. Deviations from the normal and qualified procedure can be recognized when preparing an

28、d spraying a component.If the fracture occurs cohesively in the coating when applying the tensile adhesive strength test, the coatings strength in the direction normal to the surface is supplied. Influences of variations in spray conditions can be identified via proper interpretation of tensile test

29、 results. Microscopic investigations of the fractured surface can supply further information for judging the quality of the coatings structure.A revision of the existing document had been required as a result of the identification of significant influences on the test results caused by the tensile t

30、est bonding procedure and by the properties of the adhesive itself. These findings were not adequately covered in the previous version of this document. ISO 2017 All rights reserved vBS EN ISO 14916:2017BS EN ISO 14916:2017Thermal spraying Determination of tensile adhesive strength1 ScopeThis docume

31、nt specifies the procedure to determine the tensile adhesive strength of thermally sprayed coatings under tension in the direction normal to the surface of the coating by applying a tensile test. By using this procedure, comparability of the test results is ensured.The test is intended to determine

32、the tensile adhesive strength between the thermally sprayed coating and the substrate material or between the bond and top coat and/or of the cohesive strength of the related coat of the coating system. In some cases, thermally sprayed coatings might have more than two layers. The method specified i

33、n this document applies also to determine the tensile adhesive strength between the interfaces of different layers in a coating system which consists of more than two layers.This test is sufficient to compare coatings manufactured using same or similar feedstock materials and thermal spray processes

34、 with each other. The tensile adhesive strength test is not intended to provide absolute values for evaluation of the durability of coatings under operational use.The test is used to assess the influence of substrate preparation, the spraying conditions and the process parameter on the tensile adhes

35、ive strength of thermally sprayed coatings. It can also be employed in order to monitor the consistency of the manufacturing and spraying processes.NOTE This tensile test can also be applied to very thin coatings. Moreover, the infiltration of bonding agent into the thermally sprayed coatings contai

36、ning a required level of porosity can be minimized using an appropriate bonding agent (foil rather than liquid). For further instructions, please refer to 6.5.3. This tensile test is inappropriate for determining the adhesive strength of fused spray coatings deposited using self-fluxing alloys due t

37、o their inherent high adhesion strength values.2 Normative 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

38、 edition of the referenced document (including any amendments) applies.ISO 7500-1, Metallic materials Calibration and verification of static uniaxial testing machines Part 1: Tension/compression testing machines Calibration and verification of the force-measuring systemISO 14917, Thermal spraying Te

39、rminology, classificationEN 13507, Thermal spraying Pre-treatment of surfaces of metallic parts and components for thermal spraying3 Terms and definitionsFor the purposes of this document, the following terms and definitions apply.ISO and IEC maintain terminological databases for use in standardizat

40、ion at the following addresses: IEC Electropedia: available at h t t p :/ www .electropedia .org/ ISO Online browsing platform: available at h t t p :/ www .iso .org/ obpINTERNATIONAL STANDARD ISO 14916:2017(E) ISO 2017 All rights reserved 1BS EN ISO 14916:2017ISO 14916:2017(E)3.1adhesive strengthRH

41、tensile strength measured in the tension test, which is calculated from the quotient of the maximum load Fmaxand the cross-section area of the fractured face3.2adhesive failurefracture, which runs along the interface between coating and substrateNote 1 to entry: The coating will be totally separated

42、 away from the substrate.Note 2 to entry: The inter-particle bonding (cohesive strength) is higher than the adhesive strength of the coating.3.3cohesive failurefracture, which takes place within the coatingNote 1 to entry: The inter-particle bonding (cohesive strength) is lower than the adhesion str

43、ength of the coating.3.4adhesive-cohesive failurefracture, which is partially located in the interface of the coating to the substrate and partially within the coating3.5internal adhesive strengthadhesive strength between the layers of a coating system, e.g. between a bond and top coat3.6test discte

44、st specimen formed like a disc coated on one sideNote 1 to entry: This is to be positioned and glued between two loading blocks when preparing the tensile test specimen.3.7reference specimenspecimen for determination of the strength of bonding agentNote 1 to entry: This consists of two uncoated load

45、ing blocks glued together using the same joining procedure as for all other tested specimens.4 PrinciplesThe test methods listed in this document are recommended for quality control or characterization of coatings and/or coating systems in order to improve thermal spray processes or to develop coati

46、ngs with increased adhesive and cohesive strength as well as with improved microstructure.Thermally sprayed coatings exhibit as a thumb of rule inherent to the characteristics of the process a porous microstructure. Due to the requirements of their targeted application areas, they may contain a high

47、 level of porosity. Due to the possibility of infiltration of the coating by the bonding agent, the porous character of a coating can be unfavourable. The development of incorrect types or quantities of bonding agents can lead to significant changes in the coating properties so that the measurement

48、results can be invalid.Furthermore, only loads normal to the coating surface, which are free of bending or torsion moments, shall be applied during tensile loading. Therefore, adequate clamping and centring devices shall be used during the entire manufacturing process of the test specimens and durin

49、g the testing.2 ISO 2017 All rights reservedBS EN ISO 14916:2017ISO 14916:2017(E)5 Equipment for testing and measuring and auxiliary equipment5.1 Test instrumentsA tensile testing machine according to ISO 7500-1, class 1, with a suitable clamping system shall be used, which ensures clamping and loading of the specimens through the centre line following no bending and torsion moments.This can be achieved by a ball joint which is specified in this document (for details, see Figure 1) or by a universal suspension examples are according t