ASD-STAN PREN 4474-2014 Aerospace series Aluminium pigmented coatings Coating methods (Edition P 2).pdf
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1、ASD-STAN STANDARD NORME ASD-STAN ASD-STAN NORM prEN 4474 Edition P 2 November 2014 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATION Rue Montoyer 10 - 1000 Brussels - Tel. 32 2 775 8126 - Fax. 32 2 775 8131 - www.asd-stan.org ICS: Supersedes edition P 1 of Feb
2、ruary 1999 and will supersede EN 4474:2009 Descriptors: ENGLISH VERSION Aerospace series Aluminium pigmented coatings Coating methods Srie arospatiale Revtements alumino-organiques Mthode dapplication Luft- und Raumfahrt Aluminium pigmenttete Beschichtungen Beschichtungsverfahren This “Aerospace Ser
3、ies“ Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries Association of Europe - Standardization). It is published for the needs of the European Aerospace Industry. It has been technically approved by the experts of the concerned Domain following
4、member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is affected, physically or functionally, without re-identification of the standard. After examination and review by users and formal agreement of ASD-ST
5、AN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full European Standard (EN). The CEN national members have then to implement the EN at national level by giving the EN the status of a national standard
6、and by withdrawing any national standards conflicting with the EN. Edition approved for publication 1st November 2014 Comments should be sent within six months after the date of publication to ASD-STAN Mechanical Domain percentage of solvent plus reference of the solvent product; number of the mater
7、ial standard and metallurgical condition of the latter; areas to be processed; thickness of the pigmented coating, if necessary, (see Table 1); duration and temperature of curing. 7 Surface roughness of parts prior to application It shall be specified on the drawing or in the definition documents. N
8、OTE The surface roughness is an important factor affecting adhesion and behaviour of the coating in service. 8 Surface preparation 8.1 Parts in titanium and titanium alloys Unless otherwise specified, degreasing followed by abrasive blasting. 8.2 Parts in corrosion resisting steel Unless otherwise s
9、pecified, or degreasing followed by abrasive blasting. 9 Coating 9.1 General It is recommended to apply the coating: if possible within 24 h, after surface preparation ; precautions shall be taken to prevent contamination or corrosion of the parts awaiting treatment; in a clean and dry environment,
10、avoiding any operations liable to contaminate the surfaces to be treated. 9.2 Application by dipping Dipping can be performed as follows: adjust the viscosity of the solution (see EN ISO 2431 or EN ISO 2884-1) to the value given by the manufacturer of the product to be deposited; if necessary, pre-h
11、eat the parts to about 50 C; immerse the parts at a speed determined by tests on pre-production parts; keep the parts immersed for 2 s to 10 s; prEN 4474:2014 (E) 6 remove the parts at a speed determined by tests on pre-production parts; drain parts; dry parts avoiding handling them; if necessary, c
12、ure the coating in an oven. The temperature and duration shall comply with the values given by the manufacturer of the product used. 9.3 Application by spraying Spaying can be performed as follows: adjust the viscosity of the solution (see ISO 2431 or ISO 2884-1) to the value given by the manufactur
13、er; if necessary, pre-heat the parts to approx. 50 C; produce the coating by applying successive passes, the gun setting and its distance being determined by tests on pre-production parts; dry parts avoiding handling them; if necessary, cure the coating in an oven. The temperature and duration shall
14、 comply with the values given by the manufacturer of the product to be used. 9.4 Other applications Other application methods producing the same quality of deposit may be used (for example: barrel deposition). 10 Post-treatment If the tolerances of the parts necessitate mechanical finishing, it shal
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