SIST EN 15340:2007
(Main)Thermal spraying - Determination of shear load resistance of thermally sprayed coatings
Thermal spraying - Determination of shear load resistance of thermally sprayed coatings
This European Standard specifies the procedure for determination of the shear load resistance of thermally sprayed coatings, provided that a minimum thickness is given.
Additionally this European Standard defines the shear load resistance and the designation of the fracture’s structure on the test specimen, which occurs when the shear adhesive or adhesive/ cohesive or cohesive strength of the coating or the coating system will be exceeded.
The test report is the basis for comparative statements regarding shear load resistance and structure of fracture.
NOTE The test for the determination of the shear load resistance is not recommended for sprayed coatings thinner than approximately 150 µm because the adjustment of shear distance becomes critical.
Thermisches Spritzen - Bestimmung des Scherbeanspruchungswiderstandes bei thermisch gespritzten Schichten
La présente Norme européenne prescrit le mode opératoire permettant de déterminer la résistance au cisaillement des revetements obtenus par projection thermique, a condition de disposer d’une épaisseur minimale.
De plus, la présente Norme européenne définit la résistance au cisaillement et la désignation de la structure de la rupture qui se produit sur l’éprouvette en cas de dépassement de l’adhérence en cisaillement ou de l’adhérence en cisaillement/en cohésion ou de la cohésion en cisaillement du revetement ou du systeme de revetement.
Les observations comparatives concernant la résistance au cisaillement et la structure de la fissure se fondent sur le rapport d’essai.
NOTE L’essai portant sur la détermination de la résistance au cisaillement est déconseillé pour tout revetement projeté d’une épaisseur inférieure a environ 150 µm, le réglage de la distance de cisaillement devenant alors critique.
Projection thermique - Détermination de la résistance au cisaillement des revetements obtenus par projection thermique
Vroče brizganje – Ugotavljanje odpornosti vroče brizganih prevlek proti strižnim obremenitvam
General Information
Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Thermal spraying - Determination of shear load resistance of thermally sprayed coatingsREUHPHQLWYDPProjection thermique - Détermination de la résistance au cisaillement des revetements obtenus par projection thermiqueThermisches Spritzen - Bestimmung des Scherbeanspruchungswiderstandes bei thermisch gespritzten SchichtenTa slovenski standard je istoveten z:EN 15340:2007SIST EN 15340:2007en;fr;de25.220.20Površinska obdelavaSurface treatmentICS:SLOVENSKI
STANDARDSIST EN 15340:200701-junij-2007
EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 15340March 2007ICS 25.220.20 English VersionThermal spraying - Determination of shear load resistance ofthermally sprayed coatingsProjection thermique - Détermination de la résistance aucisaillement des revêtements obtenus par projectionthermiqueThermisches Spritzen - Bestimmung desScherbeanspruchungswiderstandes bei thermischgespritzten SchichtenThis European Standard was approved by CEN on 3 February 2007.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN 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 translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2007 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 15340:2007: E
EN 15340:2007 (E) 2 Contents Page Foreword.3 Introduction.4 1 Scope.5 2 Normative references.5 3 Terms and definitions.5 4 Equipment.6 5 Specimens.7 5.1 Shape.7 5.2 Preparation.8 5.3 Number of specimens to be tested.9 6 Procedure.9 7 Results.9 8 Test report.9 Annex A (informative)
Evaluation.11 Annex B (informative)
Coating systems and sources of error.14 B.1 Coating systems (bond/top coat).14 B.2 Faults in testing.14 Bibliography.15
EN 15340:2007 (E) 3 Foreword This document (EN 15340:2007) has been prepared by 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 endorsement, at the latest by September 2007, and conflicting national standards shall be withdrawn at the latest by September 2007. 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, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EN 15340:2007 (E) 4 Introduction The test is conducted to determine the shear load resistance of the bond between the spray deposit and the parent material (adhesive strength) and/or the strength of the coating itself (cohesive strength). If adhesive strength of the sprayed coating to the base material supersedes the cohesive strength, primarily the cohesive strength of the deposit is determined. During the test the coating is loaded parallel to the interface of coating/substrate. The test is used to evaluate the effects of parent material and spray material, surface preparation of the work piece before spraying, and the spraying conditions on the adhesive and/or cohesive strength of thermally sprayed coatings, or for quality control and routine supervision of the spray works.
EN 15340:2007 (E) 5 1 Scope This European Standard specifies the procedure for determination of the shear load resistance of thermally sprayed coatings, provided that a minimum thickness is given. Additionally this European Standard defines the shear load resistance and the designation of the fracture’s structure on the test specimen, which occurs when the shear adhesive or adhesive/ cohesive or cohesive strength of the coating or the coating system will be exceeded. The test report is the basis for comparative statements regarding shear load resistance and structure of fracture. NOTE The test for the determination of the shear load resistance is not recommended for sprayed coatings thinner than approximately 150 µm because the adjustment of shear distance becomes critical. 2 Normative references The 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) applies. EN 657:2005, Thermal spraying — Terminology, classification EN ISO 7500-1, Metallic materials — Verification of static uniaxial testing machines — Part 1: Tension/compression testing machines — Verification and calibration of the force-measuring system (ISO 7500-1:2004) ISO 1832, Indexable inserts for cutting tools — Designation 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 657:2005 and the following apply. 3.1 shear strength FSa maximum force that causes fracture of the specimen in the interface coating/substrate NOTE This fracture mode is called “Mode 1”. 3.2 shear adhesive/cohesive strength FSa/c maximum force that causes mixed fracture partially within coating material and partially in the interface coating/substrate NOTE This fracture mode is called “Mode 2”. 3.3 shear cohesive strength FSc maximum force that causes fracture of the specimen within the coating material NOTE This fracture mode is called:
EN 15340:2007 (E) 6 •
“Mode 3a” - if in case of hard coatings continuous blistering of small or larger pieces of the coating occurs; - if soft and/or porous coatings will be compressed and continuously scraped off; • “Mode 3b” - if the fracture path runs within the coating especially parallel to the interface coating/substrate and the coating part under the shear plate detaches in one piece 3.4 shear energy ES area below the force displacement curve provided by the shear test NOTE The energy ES up to the first shear force maximum can be calculated using the force-displacement curve provided by the shear test. The energy ES relates to the energy absorption of the coating-substrate system until failure. 3.5 shear distance d distance between interface coating/substrate and the edge of the shear plate 3.6 shear load resistance value of the first maximum of the load during the shear test process 4 Equipment The shear test may be performed using a universal testing machine in accordance with EN ISO 7500-1 class 2.5 or using stand alone desk top machine which fulfils the corresponding requirements for accuracy and reproducibility. The construction of the testing machine shall be able to apply a force required for the operation. The principle of the testing set up is demonstrated in Figure 1.
EN 15340:2007 (E) 7
Key 1 load cell
6 specimen holder 2 guided punch
7 displacement gauge
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