oSIST prEN 15520:2023

SLOVENSKI STANDARD
oSIST prEN 15520:2023
01-marec-2023
Nadomešča:
SIST EN 15520:2007
Vroče brizganje - Priporočila za konstrukcijsko oblikovanje komponent s
prevlekami, nanesenimi z vročim brizganjem
Thermal spraying - Recommendations for constructional design of components with
thermally sprayed coatings
Thermisches Spritzen - Empfehlungen zum konstruktiven Gestalten von Bauteilen mit
thermisch gespritzten Schichten
Projection thermique - Recommandations relatives à la conception des éléments de
construction comportant un revêtement déposé par projection thermique
Ta slovenski standard je istoveten z: prEN 15520
ICS:
25.220.20 Površinska obdelava Surface treatment
oSIST prEN 15520:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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oSIST prEN 15520:2023

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oSIST prEN 15520:2023


DRAFT
EUROPEAN STANDARD
prEN 15520
NORME EUROPÉENNE

EUROPÄISCHE NORM

January 2023
ICS Will supersede EN 15520:2007
English Version

Thermal spraying - Recommendations for constructional
design of components with thermally sprayed coatings
Projection thermique - Recommandations relatives à la Thermisches Spritzen - Empfehlungen zum
conception des éléments de construction comportant konstruktiven Gestalten von Bauteilen mit thermisch
un revêtement déposé par projection thermique gespritzten Schichten
This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee
CEN/TC 240.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CEN 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 same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,
Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are
aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without
notice and shall not be referred to as a European Standard.


EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 15520:2023 E
worldwide for CEN national Members.

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oSIST prEN 15520:2023
prEN 15520:2023(E)
Contents Page
European foreword . 3
Introduction . 4
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Applications and specific properties of thermally sprayed coatings . 5
5 Basic rules for design of components with thermal sprayed coatings . 6
6 Design for preparation of components and work pieces for thermal spraying . 7
7 Machining and post-treatment of thermal sprayed coatings . 8
8 Instructions for design - Symbolic representation of the sprayed coating on drawings
- Test instructions in the parts list . 8
9 Examples for design suitable for spraying . 8
9.1 Plane surfaces . 8
9.2 Rotationally symmetrical parts . 8
9.3 Special shape . 9
Bibliography . 17

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oSIST prEN 15520:2023
prEN 15520:2023 (E)
European foreword
This document (prEN 15520:2023) has been prepared by Technical Committee CEN/TC 240 “Thermal
spraying and thermally sprayed coatings”, the secretariat of which is held by DIN.
This document is currently submitted to the CEN Enquiry.
This document will supersede EN 15520:2007.
prEN 15520:2023 includes the following significant technical changes with respect to EN 15520:2007:
— normative references and bibliography updated;
— document editorially revised;
— figures revised and improved.
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oSIST prEN 15520:2023
prEN 15520:2023(E)
Introduction
Thermal spraying is applied to improve the surface properties of work pieces in order to increase the
wear resistance, the electrical conductivity or the electrical resistance, to achieve corrosion resistance for
the pertinent service conditions, to improve sliding behaviour or, to provide heat insulation.
Recommendations for thermal spraying are contained in EN ISO 12671.
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oSIST prEN 15520:2023
prEN 15520:2023 (E)
1 Scope
This document applies for thermal sprayed coatings. It contains basic recommendations for the design of
components, which have to be completely or partially coated. The recommendations apply for new
manufacturing as well as for repair of worn components. The coating can be of metallic, metal-ceramic,
oxide-ceramic materials or polymers.
2 Normative references
The 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 amendments) applies.
EN ISO 12671, Thermal spraying - Thermally sprayed coatings - Symbolic representation on drawings (ISO
12671)
EN 14665, Thermal spraying - Thermally sprayed coatings - Symbolic representation on drawings
3 Terms and definitions
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https://www.iso.org/obp/
— IEC Electropedia: available at https://www.electropedia.org/
4 Applications and specific properties of thermally sprayed coatings
Due to their structure, thermal sprayed coatings possess properties which markedly distinguish them
from bulk materials. An appropriate basic structural design and a suitable parent metal have to bear any
mechanical loading. Usually, thermal sprayed coatings do not increase the strength of the parent work
piece.
Some process related features and specific properties of thermal sprayed coatings are summarised in
Table 1.
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oSIST prEN 15520:2023
prEN 15520:2023(E)
Table 1 — Process related features and specific properties of thermal sprayed coatings
Process related features Specific properties of thermal sprayed coating
Components made of almost every material can Not every spraying procedure is appropriate for all
be coated by thermal spraying. applications.
Coatings with properties completely different
—
from the parent material are possible.
Coatings can be sprayed with different spraying Usually the effect of the residual stress in the
materials side by side, one upon another, or coating rises with increasing coating thickness.
mixing into one another (graded coatings).
Usually the heat input caused by spraying is so If the coating is not post heat treated the bond
low, that it is possible to avoid structural strength mainly depends on mechanical adhesive
transformation or deformation. properties. If the coating is post heat treated the
bond strength depends on diffusion and the
The heat input by fusing self-fluxing alloys or
coating is densified.
diffusion annealing may cause structural
transformation or deformation.
The ability to apply the spraying process is Some geometric dimensions e.g. internal bores
practically independent of the size of the with too small a diameter may limit the spray
component. ability.
Components with complicated shapes can be Sprayed coatings are susceptible to edge loading,
coated, if appropriate spraying equipment is point and line loading and impact stresses.
used.
Areas of a component, which shall be free of
sprayed material can be protected, e. g. by —
masking.
The untreated surface of the coating provides a
—
good basis for painting or sealing.
Several thermal spraying processes can be
—
applied on site as well as in a workshop.
Coating properties e.g. porosity can be varied to Sprayed coatings are micro porous except for post
suit particular applications. heat treated self-fluxing alloy coatings.
5 Basic rules for design of components with thermal sprayed coatings
Without proper consideration of the constructional design for thermal sprayed coatings, it may not be
possible to achieve the desired properties of the coating.
Designs which are suitable for thermal spraying will be suitable for pre-treatment, blasting and visual
inspection.
Further design instructions for specific applications are contained in EN ISO 14921 and EN ISO 17834
and for the protection of steel structures against
...