EN ISO 14916:2017
(Main)Thermal spraying - Determination of tensile adhesive strength (ISO 14916:2017)
Thermal spraying - Determination of tensile adhesive strength (ISO 14916:2017)
ISO 14916:2017 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 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 in 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 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 adhesive 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 containing 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 to their inherent high adhesion strength values.
Thermisches Spritzen - Ermittlung der Haftzugfestigkeit (ISO 14916:2017)
Dieses Dokument legt das Verfahren zur Ermittlung der Haftzugfestigkeit bei einem thermischen Spritzverfahren unter Zugbeanspruchung in senkrechter Richtung zur Oberfläche der Beschichtung mithilfe eines Zugversuches fest. Durch Anwendung dieses Verfahrens wird die Vergleich¬barkeit der Prüfergebnisse gewährleistet.
Mithilfe der Prüfung soll die Haftzugfestigkeit thermisch gespritzter Schichten und dem Werkstoff oder zwischen der Klebeschicht und der obersten Beschichtung und/oder die Bindefestigkeit der betreffenden Schicht des Beschichtungssystems ermittelt werden. In einigen Fällen, können thermisch gespritzte Beschichtungen mehr als zwei Schichten haben. Das in diesem Dokument beschriebene Verfahren ist auch anwendbar, um die Haftzugfestigkeit zwischen den Verbindungsstücken der verschiedenen Schichten in einem beschichteten System, welches aus mehr als zwei Schichten besteht, zu bestimmen.
Diese Prüfung ist ausreichend, um Beschichtungen miteinander zu vergleichen, die aus den gleichen oder ähnlichen Spritzmaterialien und thermischen Spritzprozessen hervorgegangen sind. Die Prüfung auf Haftzugfestigkeit soll keine definitiven Werte für die Berechnung der Dauerhaftigkeit von Beschichtungen unter Beanspruchung liefern.
Die Prüfung wird angewendet, um den Einfluss der Materialvorbereitung der zu beschichtenden Werkstück¬oberfläche, der Spritzbedingungen und der Prozessparameter auf die Haftzugfestigkeit der thermischen Spritzschichten zu beurteilen. Sie kann auch angewendet werden, um die Einheitlichkeit der Herstellung und der Spritz¬arbeiten zu überwachen.
ANMERKUNG Diese Zugprüfung eignet sich auch für sehr dünne Beschichtungen und kann zudem durch Ver¬wen-dung eines geeigneten Klebstoffs (Folienklebstoff eher als Flüssigklebstoff) die Infiltrierung auch bei Spritz¬be-schichtungen mit einer erforderlichen Porositätsstufe minimieren. Weitere Anweisungen können 6.5.3 entnommen wer¬den. Für die Bestimmung der Haftzugfestigkeit bei aufgeschmolzenen Spritzbeschichtungen aus selbstfließenden Legierungen ist diese Zugprüfung wegen der hohen Kräftewerte nicht geeignet.
Projection thermique - Mesure de l'adhérence par essais de traction (ISO 14916:2017)
ISO 14916:2017 spécifie le mode opératoire permettant de déterminer la résistance d'adhérence en traction de revêtements obtenus par projection thermique sous une charge de traction appliquée perpendiculairement à la surface du revêtement lors d'un essai de traction. L'utilisation de ce mode opératoire permet de comparer les résultats d'essai.
L'essai vise à déterminer la résistance d'adhérence en traction entre le revêtement obtenu par projection thermique et le matériau du substrat ou entre la couche de liaison et la couche de finition et/ou la cohésion du revêtement concerné d'un système de revêtement. Dans certains cas, les revêtements obtenus par projection thermique peuvent comporter plus de deux couches. La méthode spécifiée dans le présent document s'applique également pour déterminer la résistance d'adhérence en traction entre les interfaces des différentes couches d'un système de revêtement constitué de plus de deux couches.
Cet essai est suffisant pour comparer des revêtements obtenus à l'aide de matières premières et de procédés de projection thermique identiques ou similaires. La mesure de l'adhérence par essais de traction n'est pas destinée à fournir des valeurs absolues pour l'évaluation de la durabilité des revêtements dans des conditions d'exploitation.
L'essai est utilisé pour évaluer l'influence de la préparation du substrat, des conditions de projection et des paramètres du procédé sur la résistance d'adhérence en traction de revêtements obtenus par projection thermique. Il peut également être employé pour surveiller la constance de la fabrication et des procédés de projection.
NOTE Cet essai de traction peut également être appliqué à des revêtements très minces. De plus, l'infiltration d'adhésif dans les revêtements obtenus par projection thermique présentant un niveau de porosité prescrit peut être réduite en utilisant un adhésif approprié (en feuille plutôt que liquide). Voir 6.5.3 pour des instructions supplémentaires. Cet essai de traction n'est pas approprié à la mesure de la résistance d'adhérence de revêtements projetés et fondus déposés à l'aide d'alliages autofondants, en raison de leurs valeurs d'adhérence intrinsèques élevées.
Vroče brizganje - Ugotavljanje adhezijske natezne trdnosti (ISO 14916:2017)
Adhezijska natezna trdnost je trdnost, pridobljena pri nateznem preskusu. Preskus se uporablja za ocenjevanje učinkov glavne kovine in z brizganjem nanesenega materiala, priprave površine obdelovanca in pogojev brizganja na sprijemno in adhezijsko trdnost premazov, nanesenih z brizganjem, ter za rutinski nadzor brizgalnih del med izdelavo. Dokument vsebuje preskušance različnih premerov in različnih oblik.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-junij-2017
1DGRPHãþD
SIST EN 582:1999
9URþHEUL]JDQMH8JRWDYOMDQMHDGKH]LMVNHQDWH]QHWUGQRVWL ,62
Thermal spraying - Determination of tensile adhesive strength (ISO 14916:2017)
Thermisches Spritzen - Ermittlung der Haftzugfestigkeit (ISO 14916:2017)
Projection thermique - Mesure de l'adhérence par essais de traction (ISO 14916:2017)
Ta slovenski standard je istoveten z: EN ISO 14916:2017
ICS:
25.220.20 Površinska obdelava Surface treatment
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 14916
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2017
EUROPÄISCHE NORM
ICS 25.220.20 Supersedes EN 582:1993
English Version
Thermal spraying - Determination of tensile adhesive
strength (ISO 14916:2017)
Projection thermique - Mesure de l'adhérence par Thermisches Spritzen - Ermittlung der
essais de traction (ISO 14916:2017) Haftzugfestigkeit (ISO 14916:2017)
This European Standard was approved by CEN on 8 March 2017.
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 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-CENELEC Management
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© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14916:2017 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 14916:2017) has been prepared by Technical Committee ISO/TC 107 "Metallic
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 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 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 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, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 14916:2017 has been approved by CEN as EN ISO 14916:2017 without any modification.
INTERNATIONAL ISO
STANDARD 14916
Second edition
2017-03
Thermal spraying — Determination of
tensile adhesive strength
Projection thermique — Mesure de l’adhérence par essais de traction
Reference number
ISO 14916:2017(E)
©
ISO 2017
ISO 14916:2017(E)
© ISO 2017, Published in Switzerland
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ii © ISO 2017 – All rights reserved
ISO 14916:2017(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principles . 2
5 Equipment for testing and measuring and auxiliary equipment . 3
5.1 Test instruments . 3
5.2 Measurement instrument . 3
5.3 Specimen fixing device for bonding of the tensile adhesive specimen . 4
6 Specimens . 4
6.1 Shape of specimens . 4
6.2 Material of the specimen . 6
6.3 Preparing the substrate and loading blocks . 6
6.4 Preparing and spraying of the specimen . 8
6.5 Manufacture of the specimens for tensile testing . 9
6.5.1 Machining of the coated substrate block (or test disc) and preparation
for bonding. 9
6.5.2 Gluing the specimen . . 9
6.5.3 Bonding agent . 9
6.6 Reference specimen .10
6.7 Number of specimens to be tested .10
7 Applying the testing .10
8 Measurement readings and evaluation .11
9 Test report — Documentation .12
10 Possible sources of fault when preparing the specimens and on testing .13
Annex A (informative) Work instructions for gluing .14
Annex B (informative) Recommendations for further auxiliary equipment .17
Annex C (informative) Function areas on the tensile adhesive specimen and possibilities of
fracture locations according to ASTM C633-13 .21
Annex D (informative) Record for the applied tensile adhesive test according to this document .22
Bibliography .26
ISO 14916:2017(E)
Foreword
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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 2017 – All rights reserved
ISO 14916:2017(E)
Introduction
The 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 and spraying a component.
If the fracture occurs cohesively in the coating when applying the tensile adhesive strength test, the
coating’s 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 results. Microscopic investigations
of the fractured surface can supply further information for judging the quality of the coating‘s 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 test bonding procedure and by the properties of the
adhesive itself. These findings were not adequately covered in the previous version of this document.
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