BS EN 13507-2010 Thermal spraying - Pre-treatment of surfaces of metallic parts and components for thermal spraying《热喷涂 热喷涂用元件和金属零部件的表面预处理》.pdf

1、BS EN 13507:2010ICS 25.220.10NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBRITISH STANDARDThermal spraying Pre-treatment ofsurfaces of metallicparts and componentsfor thermal sprayingThis British Standardwas published under theauthority of the StandardsPolicy and StrategyCom

2、mittee on 31 March2010 BSI 2010ISBN 978 0 580 63434 5Amendments/corrigenda issued since publicationDate CommentsBS EN 13507:2010National forewordThis British Standard is the UK implementation of EN 13507:2010. Itsupersedes BS EN 13507:2001 which is withdrawn.The UK participation in its preparation w

3、as entrusted to TechnicalCommittee STI/40, Thermally sprayed inorganic finishes.A list of organizations represented on this committee can be obtained onrequest to its secretary.This publication does not purport to include all the necessary provisionsof a contract. Users are responsible for its corre

4、ct application.Compliance with a British Standard cannot confer immunityfrom legal obligations.BS EN 13507:2010EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 13507 February 2010 ICS 25.220.10 Supersedes EN 13507:2001English Version Thermal spraying - Pre-treatment of surfaces of metallic parts

5、 and components for thermal spraying Projection thermique - Traitement pralable de surface de pices et composants mtalliques pour projection thermiques Thermisches Spritzen - Vorbehandlung von Oberflchen metallischer Werkstcke und Bauteile fr das thermische Spritzen This European Standard was approv

6、ed by CEN on 9 January 2010. 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 s

7、tandards 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 translation under the responsibility of a CEN member into its own language and notifi

8、ed to the CEN 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, Luxembo

9、urg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights

10、 of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 13507:2010: EBS EN 13507:2010EN 13507:2010 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Principles 44 Methods of surface preparation .54.1 General 54.2 Degreasing .54.3 Grit bla

11、sting 54.4 Threading/grooving .74.5 Cleaning by reversed transferred arc 74.6 Bond coatings 74.7 Precautions for health, safety and environmental protection 75 Preheating 76 Masking of areas not to be coated .87 Effect of pre-treatment on the fatigue strength 8Bibliography 9BS EN 13507:2010EN 13507:

12、2010 (E) 3 Foreword This document (EN 13507:2010) 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 ident

13、ical text or by endorsement, at the latest by August 2010, and conflicting national standards shall be withdrawn at the latest by August 2010. 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 re

14、sponsible for identifying any or all such patent rights. This document supersedes EN 13507:2001. This standard differs from EN 13507:2001 as follows: a) normative references have been reviewed; b) Clause 3 (Principles) has been modified; c) in Clause 4 (Methods of surface preparation), paragraphs re

15、garding “Degreasing“ and “Cleanliness“ have been reviewed and shortened; d) 4.2.3.3 (Copper refinery slag and coal furnace slag), 4.2.3.4 (Quartz sand) and 4.4 (Roughening by electric spark) have been deleted; e) in 4.2.5 (Examination of grit blasted surfaces) reference to EN ISO 8503-2 and EN ISO 8

16、503-4 have been added. New number of this subclause is 4.3.5; f) 4.7 has been reviewed under the aspects of precautions for health, safety and environmental protection. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to imp

17、lement this European Standard: 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, Romania, Slovakia, Slovenia, Spain, Sweden, S

18、witzerland and the United Kingdom. BS EN 13507:2010EN 13507:2010 (E) 4 1 Scope This European Standard specifies the processing of surface preparation for thermal spraying. Important principles indicated in this European Standard should be taken into consideration when surfaces of metallic parts are

19、to be prepared for thermal spraying. This European Standard applies for production of new parts as well as for the repair of worn parts. This European Standard does not apply for thermal spraying in the case of protection against atmospheric corrosion by coatings of zinc and/or aluminium and their a

20、lloys, for which EN ISO 2063 applies. 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 amendment

21、s) applies. EN ISO 8501-1, Preparation of steel substrates before application of paints and related products Visual assessment of surface cleanliness Part 1: Rust grades and preparation grades of uncoated steel substrates and of steel substrates after overall removal of previous coatings (ISO 8501-1

22、:2007) EN ISO 11124-1, Preparation of steel substrates before application of paints and related products Specifications for metallic blast-cleaning abrasives Part 1: General introduction and classification (ISO 11124-1:1993) EN ISO 11124-2, Preparation of steel substrates before application of paint

23、s and related products Specifications for metallic blast-cleaning abrasives Part 2: Chilled-iron grit (ISO 11124-2:1993) EN ISO 11126-1, Preparation of steel substrates before application of paints and related products Specifications for non-metallic blast-cleaning abrasives Part 1: General introduc

24、tion and classification (ISO 11126-1:1993, including Technical Corrigenda 1:1997 and 2:1997) 3 Principles The surface preparation of a work piece has a substantial effect on the quality of the sprayed coating especially with regard to its adhesion to the substrate. To achieve a sufficient adhesive s

25、trength the metallic surface shall be processed until a technically clean interface is generated. The surface to be prepared shall be accessible for grit blasting. EN 15520 gives information regarding suitable component design. Welding splashes and residues of welding slag shall be removed, and weld

26、 seams and brazed or soldered joints shall be prepared with particular accuracy. Oxides, oil, grease and other contamination shall be removed. The roughness of the surface shall enable a good interlocking of the sprayed coating to the substrate. Grit blasting is a suitable method for obtaining appro

27、priate roughened metallic surfaces, thereby also enlarging the effective area. BS EN 13507:2010EN 13507:2010 (E) 5 The surface to be sprayed shall be kept dry during the preparation and spraying process. For outdoor spraying this requirement shall be met by taking suitable precautions. The prepared

28、surface shall be coated subsequently after carrying out the grit blasting without any undue loss of time1). 4 Methods of surface preparation 4.1 General Depending upon the function of the sprayed coating and the initial condition of the surface, different preparation procedures are used. In any case

29、 scale, rust, dust and other contaminants shall be removed by mechanical cleaning. 4.2 Degreasing Oil and grease contaminants shall be removed thoroughly prior to processing the surface. In particular attention shall be given to bores, slots and channels. Design of components shall be such that flui

30、ds can drain out. Degreasing can be done by heating, dipping and spraying processes with or without additional mechanical support by ultrasonic cleaning, brushing or steam jet blower. Aqueous wash solutions or organic solvents are suitable. For the application of wash solutions a mild alkaline clean

31、er with a high content of surfactants may be preferred. Whenever possible cleaner free of phosphate should be used. The application of chlorinated or fluorinated hydrocarbons should be avoided due to their detrimental effect on health and the environment. Subsequent rinsing and drying is necessary.

32、For health, safety and environment aspects see 4.7. 4.3 Grit blasting 4.3.1 Cleanliness For thermal spraying the surface shall be sufficiently cleaned and roughened by applying a suitable grit. The grit blasting process shall be continued until the area to be coated shows a metallic surface with a u

33、niform structure according to EN ISO 8501-1 Sa 3. Unwanted loss of material, which can occur by excessive blasting, shall be considered. Generally, the preparation grade Sa 3 is necessary but often not sufficient for the purpose. If necessary, the required condition of cleanliness and roughness shal

34、l be agreed between the contracting parties. The preparation by grit blasting will vary depending on the type and size of the abrasive, blasting parameters, e.g. blasting time, distance, angle, particle velocity and machine type. Furthermore, the wear rate of the abrasives substantially effects the

35、properties of a grit blasted surface. Therefore, the operating parameters for grit blasting shall be adequate to meet the required roughness criteria and, if necessary, have to be optimised by grit blasting of test pieces of similar material. For health, safety and environment aspects see 4.7. 1) Ti

36、me permissible for a break depends upon material to be coated and the influences exerted on the prepared surface, e.g. dust, vapour and moisture (temperature below dew point, rain, etc.). BS EN 13507:2010EN 13507:2010 (E) 6 4.3.2 Roughness Since roughness is not the only requirement of the surface p

37、reparation for thermal spraying, details of the roughness (peak-to-valley height) have been disregarded as well as their control. Specific roughness patterns shall be agreed and these will serve as reference for the profile required. In EN ISO 8503-1 to EN ISO 8503-4, specifications and definitions

38、for ISO surface profile comparators for the assessment of abrasive blasted, cleaned surfaces and methods for the manufacturing of test pieces are outlined. When assessing the roughness, care shall be taken to avoid contamination of the prepared surface. Adequate precautions shall be taken to ensure

39、removal of oil and moisture from the air supply as these contaminants have a harmful effect on the quality of the surface preparation and thus on the bond strength of the sprayed coating. EN ISO 12944-4 gives information regarding suitable grit blasting equipment. 4.3.3 Abrasives 4.3.3.1 General The

40、 blasting medium can be selected according to the standards of EN ISO 11126-3, EN ISO 11126-4, EN ISO 11126-7 and EN ISO 11124-2. It shall be clean and dry. Circulating blasting media shall not have been used before for other purposes where impurities may have been introduced, e.g. during grit blast

41、ing of plastics, removal of coatings, blasting of oily or contaminated surfaces. Only sharp edged blasting media will generate a suitable roughness, therefore, visual checking of the grits particle size and shape is recommended. Fine dust and rounded particles shall be removed. 4.3.3.2 Fused alumina

42、 and silicon carbide Fused alumina (EN ISO 11126-7) and silicon carbide exert an intense effect due to their high hardness and sharp edges and are suited therefore for blasting of very hard surfaces. Due to the limited lifetime of alumina and silicon carbide (SiC) grit the degree of deterioration sh

43、all be assessed by regular inspection. Particular care shall be taken when blasting with SiC. Optimising the blasting parameter (e.g. pressure, angle, grit size, distance) is necessary to minimise the number of particles that are embedded. 4.3.3.3 Chilled iron grit Chilled iron grit has proved to be

44、 well suited for the preparation of surfaces for thermal spraying. The particle shape shall retain a sharp cutting edge according to EN ISO 11124-2. It is distinguished by its long edge life. However, when blasting non-ferrous substrate metals or stainless steel there is an enhanced corrosion probab

45、ility. 4.3.3.4 Particle size range The mean particle size of the abrasive shall be adapted to the respective application (see also EN ISO 12944-4). The appropriate particle size range shall be selected according to the standards EN ISO 11126-1 and EN ISO 11124-1. 4.3.4 Post cleaning after grit blast

46、ing A thorough cleaning of the blasted surface by removing grit residues and dust is of great importance for the bond strength of the coating. The best way to remove impurities is by vacuum cleaning or blasting with dry and oil-free compressed air. For particular applications further means may be ne

47、cessary to remove the grit residues. BS EN 13507:2010EN 13507:2010 (E) 7 4.3.5 Examination of grit blasted surfaces Cleanliness and roughness of the surface achieved by grit blasting can be confirmed using reference standards. Such reference standards and their use are described in EN ISO 8503-2 and

48、 EN ISO 8503-4. Further extensive requirements (refer to 4.3.1, 4.3.2 and 4.3.4) shall be agreed between the contracting parties. 4.4 Threading/grooving Threading or grooving, followed by grit blasting may be used where appropriate. In particular if parts are to be coated internally (bushing) agains

49、t abrasive wear or if thick repair coatings ( 0,8 mm) are required. The thread serves to reduce the effect of shrinkage forces. The grooving should have a rounded profile. Threading shall be done without any liquid cooling or lubrication agents. The depth of the groove shall be adjusted in relation to the final coating thickness. 4.5 Cleaning by reversed transferred arc In vacuum plasma spraying oxide layers are removed from the substrate by using a reversed transferred electric arc (negative polarit