ASD-STAN PREN 2133-2010 Aerospace series Cadmium plating of steels with specified tensile strength Less than or equal to 1 450 MPa copper copper alloys and nickel alloys (Edition P.pdf

1、ASD STANDARD NORME ASD ASD NORM prEN 2133 Edition P 1 February 2010 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATIONAvenue de Tervuren, 270 - B-1150 Brussels - Tel. 32 2 775 8126 - Fax. 32 2 775 8131 - www.asd-stan.orgICS: 49.040.40 Will supersede EN 2133:199

2、7 Descriptors: ENGLISH VERSION Aerospace series Cadmium plating of steels with specified tensile strength 1 450 MPa, copper, copper alloys and nickel alloys Srie arospatiale Cadmiage lectrolytique des aciers de rsistance 1 450 MPa, du cuivre, des alliages de cuivre et des alliages de nickel Luft- un

3、d Raumfahrt Kadmieren von Sthlen mit einer Zugfestigkeit 1 450 MPa, von Kupfer, von Kupferlegierungen und von Nickellegierungen This “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries Association of Europe - Standardization). I

4、t is published for the needs of the European Aerospace Industry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that interchangeability is af

5、fected, physically or functionally, without re-identification of the standard. After examination and review by users and formal agreement of ASD-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and transformation to full E

6、uropean 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 and by withdrawing any national standards conflicting with the EN. Edition approved for publication 28 February 2010 Comments should be sent within six m

7、onths after the date of publication to ASD-STAN Non-metallic Material Domain Copyright 2010 by ASD-STAN prEN 2133:2010 (E) 2 Contents Page Foreword2 1 Scope 3 2 Normative references 3 3 Purpose of process .3 4 Limitations of process use .4 5 Terms and definitions .4 6 Coating thickness4 7 Symbols 4

8、8 Information for the processor 4 9 Condition of parts prior to the treatment 5 10 Process schedule 5 11 Post-treatment6 12 Removal of the plating 6 13 Required characteristics.6 14 Test methods7 15 Quality assurance8 16 Designation 9 Foreword This standard was reviewed by the Domain Technical Coord

9、inator of ASD-STANs Non-metallic Material Domain. After inquiries and votes carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Process Manual, this standard has received approval for Publication. prEN 2133:2010 (E) 3 1 Scope This standard specifies the electrolytic cad

10、mium plating of parts in steel of tensile strength Rm(max.) 1 450 MPa, copper, copper alloys and nickel alloys, whose temperature in service does not exceed 235 C. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references,

11、only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2828, Aerospace series Adhesion test for metallic coatings by burnishing EN 2831, Aerospace series Hydrogen embrittlement of steels Test by slow bending EN 283

12、2, Aerospace series Hydrogen embrittlement of steels Notched specimen test EN 9100, Quality management systems Requirements for Aviation, Space and Defense Organizations EN ISO 1463, Metallic and oxide coatings Measurement of coating thickness Microscopical method EN ISO 2082, Metallic and other ino

13、rganic coatings Electroplated coatings of cadmium with supplementary treatments on iron or steel EN ISO 2177, Metallic coatings Measurement of coating thickness Coulometric method by anodic dissolution EN ISO 2178, Non-magnetic coatings on magnetic substrates Measurement of coating thickness Magneti

14、c method EN ISO 2819, Metallic coatings on metallic substrates Electrodeposited and chemically deposited coatings Review of methods available for testing adhesion EN ISO 3497, Metallic coatings Measurement of coating thickness X-ray spectrometric methods EN ISO 9227, Corrosion tests in artificial at

15、mospheres Salt spray tests ISO 2859-1, Sampling procedures for inspection by attributes Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection ISO 4520, Chromate conversion coatings on electroplated zinc and cadmium coatings 3 Purpose of process To ensure protec

16、tion against corrosion or to reduce the effects of galvanic coupling when assembling different materials, e.g. steel, aluminium or magnesium. prEN 2133:2010 (E) 4 4 Limitations of process use Contact of cadmium plated parts with titanium, titanium alloys, fuels and fuel lines shall be avoided at tem

17、peratures 1 100 and 1 450 190 C to 230 C, 1 h min. Carburized parts 130 C to 150 C, 6 h min. A slight discoloration of the surface by oxidation is admissible. When shot peening is specified, it shall be performed after the stress relief operations. 10 Process schedule 10.1 Covering Component areas w

18、hich according to the purchasers information must not be cadmium plated shall be covered by suitable means. 10.2 Surface pre-treatment Surface preparation means any method able to completely eliminate all surface contaminations. Methods which may result in hydrogen loading of the material shall be a

19、voided. 10.3 Nickel strike In order to ensure adhesion of the cadmium. nickel striking is applicable to corrosion resistant parts in steel, copper and copper alloys, nickel and nickel alloys. 10.4 Cadmium plating Cadmium plating is performed in an alkaline-cyanidic bath without the addition of brigh

20、teners. The composition of the bath as well as the process parameters shall be chosen such that the requirements for the cadmium coating specified by this standard (see Clause 13) are met with the addition of wetting agents being permissible. Wetting agents shall have no negative effect on the embri

21、ttlement behaviour. prEN 2133:2010 (E) 6 11 Post-treatment 11.1 De-embrittlement De-embrittlement shall be carried out within 4 h after cadmium plating, in accordance with Table 2. Table 2 De-embrittlement Substrate Temperature aC Minimum duration ah Steels 1 100 MPa Rm(max.) 1 450 MPa 190 to 230 23

22、 Carburized parts 130 to 150 23 Other materials Not required aOther conditions may be used subject to agreement between the processor and the purchaser.11.2 Chromating Unless otherwise specified, chromating shall be applied. It shall be carried out after de-embrittlement, in accordance with ISO 4520

23、, type B (yellow), class 2C. 12 Removal of the plating Both electrochemical and chemical processes may be applied. The de-metallizing variants used, however, shall not result in any roughening, pitting or embrittling of the base material or have a negative influence on its dimensions. NOTE No chemic

24、al de-metallizing processes should be chosen which could result in hydrogen loading of the workpieces. Unless this can be ensured, de-embrittlement in accordance with the provisions of Table 2 is required after de-metallizing. 13 Required characteristics 13.1 Appearance The surface shall be satin, u

25、niform and free from rough, burnt or powdery areas; pits; exfoliations; blisters. In the case of chromate coating, the surface shall be of iridescent, gold or brass colour. prEN 2133:2010 (E) 7 13.2 Adhesion See 14.1.2. 13.3 Coating thickness See Clause 6. 13.4 Hydrogen embrittlement of steels Unles

26、s otherwise specified, these tests are applicable to steels of tensile strength Rm 1 100 MPa. No rupture within 200 h (EN 2832) or final ductility 94 % of the initial ductility (EN 2831). 13.5 Corrosion resistance After exposure to salt spray (EN ISO 9227): on chromated cadmium plated parts, white c

27、admium salts shall not appear within 96 h. Corrosion of the substrate shall not occur within 336 h; on non-chromated cadmium plated parts, corrosion of the substrate shall not occur within 240 h. 14 Test methods 14.1 For process approval 14.1.1 Appearance Visual inspection 14.1.2 Adhesion See EN 282

28、8 or EN ISO 2819 (grid test). 14.1.3 Coating thickness See EN ISO 1463, EN ISO 2082, EN ISO 2177, EN ISO 2178 and EN ISO 3497 (X-ray). The choice of the method shall be agreed between the processor and the purchaser. In cases of dispute, the method specified in EN ISO 1463 is the reference method. 1

29、4.1.4 Hydrogen embrittlement See EN 2832 and EN 2831. The choice of the method shall be agreed between the processor and the purchaser. prEN 2133:2010 (E) 8 If agreed with the purchaser, the tensile strength of the samples may differ from that of the parts to be treated and from Rm 1 450 MPa. Other

30、methods may be used subject to the purchasers agreement. 14.1.5 Corrosion resistance EN ISO 9227, in a 5 % solution of sodium chloride, on the following samples: a) Material: heat-treated steel with a mass fraction of carbon of between 0,1 % and 0,18 % 2 samples. b) Minimum dimensions Thickness: 0,8

31、 mm; Length: 120 mm; Width: 60 mm. c) Coating thickness 10 m to 20 m. 14.2 For acceptance of parts 14.2.1 Appearance See 14.1.1. 14.2.2 Adhesion (if agreed) See 14.1.2. 14.2.3 Coating thickness See 14.1.3. 15 Quality assurance 15.1 Approval of the processor See EN 9100. 15.2 Process approval The pro

32、cessor shall carry out the plating on pre-production parts and/or samples determined by agreement between the processor and the purchaser; the tests specified in this standard, unless otherwise agreed between the processor and the purchaser. The process schedule shall not be changed without the prev

33、ious agreement from the purchaser. prEN 2133:2010 (E) 9 15.3 Acceptance During production, the tests may be carried out on parts and/or samples coated under the same conditions as the parts. The appearance test (see 14.2.1) shall be performed on the whole batch, unless otherwise specified. Unless ot

34、herwise specified, the adhesion tests (see 14.2.2) shall be carried out on one part or one sample per batch. Unless otherwise specified, the coating thickness (see 14.2.3) shall be measured by sampling in accordance with ISO 2859-1: code letter of the sample size, Table 1, special inspection level S

35、-3; single sampling plan for more stringent inspection; acceptable quality level (AQL) 1,5. The frequency and nature of the other tests shall be determined by agreement between the processor and the purchaser. 15.4 Reprocessing Reprocessing of parts depends on the material and may only be carried out following confirmation by the purchaser. 16 Designation EXAMPLE Description block CADMIUM PLATING Identity block EN2133C Number of this standard Coating thickness class (see Clause 6 or LN 9368-1)