EN 3021-2017 Aerospace series -- Molybdenum disulphide dry film lubricants graphite and halogen free -- Technical specification

EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 3021 July 2017 ICS 75.100 English Version Aerospace series - Molybdenum disulphide dry film lubricants graphite and halogen free - Technical specification Srie arospatiale - Lubrifiants base de bisulfure de molybdne, sans graphite et sans halogne - Spcification technique Luft- und Raumfahrt - Trockenschmierstofffilme aus Molybdnsulfid-Basis, graphitfrei und halogenfrei - Technische Lieferbedingungen This European Standard was approved by CEN on 17 April 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 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, 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 United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG  CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2017 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3021:2017 E EN 3021:2017 (E) 2 Contents Page European foreword . 3 Introduction 4 1 Scope . 5 2 Normative references . 5 3 Terms and definitions. 7 4 Composition . 7 4.1 General . 7 4.2 Type A, room temperature curing 7 4.3 Type B, heat curing 7 5 Curing 8 5.1 At ambient temperature 8 5.2 Heat curing 8 6 Storage 8 7 Batch release and qualification testing quality assurance 8 7.1 Qualification tests 8 7.2 Batch Acceptance Testing (BAT) . 8 EN 3021:2017 (E) 3 European foreword This document (EN 3021:2017) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN. 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 January 2018, and conflicting national standards shall be withdrawn at the latest by January 2018. 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. 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. EN 3021:2017 (E) 4 Introduction  The requirements of this specification concern graphite and halogen free molybdenum disulphide dry film lubricants for fastener and other parts subjected to sliding and wear. Graphite and halogenated substances may have corrosive effects on the substrate.  EN 3021:2017 (E) 5 1 Scope This standard specifies the qualification and test requirements for graphite and halogen free molybdenum disulphide dry film lubricant. Test requirements and testing of fretting, corrosion, wear and friction properties of relevant lubricants are not part of this standard. Refer to relevant standards in normative references.  All testing defined in this standard has to be certified by the manufacturer of the lubricant. In order to achieve uniform coatings with defined thickness and best adhesion properties, spray application in combination with heat curing is recommended. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 2491, Aerospace series Molybdenum disulphide dry lubricants Coating methods EN 2497, Aerospace series Dry abrasive blasting of titanium and titanium alloys  EN 3026, Aerospace series Test method for dry film lubricants Corrosion test on steel specimens EN 3027, Aerospace series Test method for dry film lubricants Salt spray test EN 3030, Aerospace series Test method for dry film lubricants Solids content EN 3840, Aerospace series Paints and varnishes Technical specification EN 3847, Aerospace series Paints and varnishes Determination of sedimentation rating 1) EN 4160, Aerospace series Paints and varnishes Determination of the effect of thermal exposure EN 10204, Metallic products Types of inspection documents EN ISO 1513, Paints and varnishes Examination and preparation of test samples (ISO 1513:2010) EN ISO 1519, Paints and varnishes Bend test (cylindrical mandrel) (ISO 1519:2011) EN ISO 1523, Determination of flash point Closed cup equilibrium method (ISO 1523:2002) EN ISO 1524, Paints, varnishes and printing inks Determination of fineness of grind (ISO 1524:2013) EN ISO 2409, Paints and varnishes Cross-cut test (ISO 2409:2013) EN ISO 2431, Paints and varnishes Determination of flow time by use of flow cups (ISO 2431:2011) EN ISO 2808, Paints and varnishes Determination of film thickness (ISO 2808:2007) 1) Published as ASD-STAN Prestandard at the date of publication of this standard. / EN 3021:2017 (E) 6 EN ISO 2811-1, Paints and varnishes Determination of density Part 1: Pyknometer method (ISO 2811-1:2011) EN ISO 2811-2, Paints and varnishes Determination of density Part 2: Immersed body (plummet) method (ISO 2811-2:2011) EN ISO 2811-3, Paints and varnishes Determination of density Part 3: Oscillation method (ISO 2811-3:2011) EN ISO 2811-4, Paints and varnishes Determination of density Part 4: Pressure cup method (ISO 2811-4:2011) EN ISO 2812-1, Paints and varnishes Determination of resistance to liquids Part 1: Immersion in liquids other than water (ISO 2812-1:2007) EN ISO 2812-2, Paints and varnishes Determination of resistance to liquids Part 2: water immersion method (ISO 2812-2:2007) EN ISO 3675, Crude petroleum and liquid petroleum products Laboratory determination of density Hydrometer method (ISO 3675:1998) EN ISO 4618, Paints and varnishes Terms and definitions (ISO 4618:2014) EN ISO 4628-2, Paints and varnishes Evaluation of degradation of coatings Designation of quantity and size of defects, and of intensity of uniform changes in appearance Part 2: Assessment of degree of blistering (ISO 4628-2:2003) EN ISO 6270-1, Paints and varnishes Determination of resistance to humidity Part 1: Continuous condensation (ISO 6270-1:1998) EN ISO 8504-2, Preparation of steel substrates before application of paints and related products Surface preparation methods Part 2: Abrasive blast-cleaning (ISO 8504-2:2000)  EN ISO 9117-1, Paints and varnishes Drying tests Part 1: Determination of through-dry state and through-dry time (ISO 9117-1:2009) EN ISO 9117-6, Paints and varnishes Drying tests Part 6: Print-free test (ISO 9117-6:2012) EN ISO 9227, Corrosion tests in artificial atmospheres Salt spray tests (ISO 9227:2012) ISO 3270, Paints and varnishes and their raw materials Temperatures and humidities for conditioning and testing ISO 8080, Aerospace Anodic treatment of titanium and titanium alloys Sulfuric acid process ISO 11075, Aircraft De-icing/anti-icing fluids ISO type I ISO 11078, Aircraft De-icing/anti-icing fluids ISO types II, III and IV EN 3021:2017 (E) 7 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 dry lubricant batch dry lubricant quantity of known composition (MoS 2 containing resin) prepared as one mixture using the same equipment 3.2 runs sags local irregularities in the film or coat thickness caused by the downward movement of a coating material during drying in a vertical or an inclined position Note 1 to entry: Small sags may be called runs, tears or droplets; large sags may be called curtains. SOURCE: EN ISO 4618, definition 2.220 3.3 blister convex deformation in a film, arising from local detachment of one or more of the constituent coats  SOURCE: EN ISO 4618, definition 2.30 3.4 porosity fine holes or pores within the coating 3.5 wrinkling development of ripples in a film of coating material during drying SOURCE: EN ISO 4618, definition 2.277 3.6 pinholing presence of small holes in the film resembling those made by a pin SOURCE: EN ISO 4618, definition 2.196 4 Composition 4.1 General The components shall be free from substances which may have a harmful effect on the substrate (e.g. corrosion, stress corrosion) and other substances, e.g.: halogenated substances, graphite, metal powders or concentration of substances which have a harmful effect on environment and or health. 4.2 Type A, room temperature curing Suitable for applications on e.g. aluminium alloys, fibre reinforced plastics. 4.3 Type B, heat curing Suitable for applications on e.g. titanium, steels, nickel refractory alloys. EN 3021:2017 (E) 8 5 Curing 5.1 At ambient temperature Curing at ambient temperature shall be in accordance with the manufacturer's recommendations. Drying may be accelerated by heat, considering the maximum temperature allowed for the substrate material. 5.2 Heat curing Heat curing shall be in accordance with the manufacturer's recommendations. Heat curing instead of curing at ambient temperature (5.1) ensures a better adhesion, higher hardness and chemical resistance of dry film lubricant. 6 Storage The storage conditions, the date of manufacture and the expiry date shall be specified by the manufacturer. Once the original container has been opened, the products shall not be returned to storage. 7 Batch release and qualification testing quality assurance See EN 2491 for application methods for these dry film lubricants. Spray application in combination with heat curing is recommended in order to achieve uniform coatings with defined thickness and best adhesion properties. 7.1 Qualification tests For product qualification, all tests defined in this standard shall be performed. A minimum of three production batches shall be tested for qualification purposes. Unless otherwise agreed, the test film thickness for qualification testing (after mechanical finishing) shall be 7,0 m null 2 m. 7.2 Batch Acceptance Testing (BAT) For batch acceptance all tests marked with “BAT” in first column shall be done. Test results of batch acceptance testing (serial production testing) shall be stated in an inspection certificate according to EN 10204. Type of EN 10204 inspection certificate to be agreed between manufacturer and customer. See Table 1. EN 3021:2017 (E) 9 Table 1 General requirements Term Detail Material description Organic, graphite-, metal powder free, dry film lubricant, main constituent molybdenum disulphide. Formulation MoS 2 molybdenum disulphide in organic binder. Preparation According to manufacturer's instruction. Technical specification EN 3840 Marking EN 3840  Storage stability According to manufacturer's instruction. Visual appearances The paint film applied shall result in an even finish free from runs, sags, blisters, porosity, wrinkling, pin holing or other defects. Application Dry film thickness 5 m up to 15 m.  CRS Corrosion Resistant Steel:  Unless otherwise agreed Pretreatment: Abrasive blasting according to EN ISO 8504-2. Ti Titanium / Titanium Alloy:  Unless otherwise agreed Pretreatment: Abrasive blasting according to EN 2497 or Anodising according to ISO 8080.  Drying conditions According to manufacturer's instruction. Quality assurance EN 3840  Packaging EN 3840  Health and safety EN 3840  Qualification procedure EN 3840  Determination of film thickness: EN ISO 2808. EN 3021:2017 (E) 10 Table 2 Physical and chemical characteristics Delivery conditions Tests according to EN 3840 Test Test criteria Test requirements  BAT Condition As received in the original container. Test method EN ISO 1513 Requirement Shall be free from extraneous matter and show no skinning, gelling, hard settlement, or other defect which will prevent satisfactory application to produce a defect free film. 1  BAT Non volatile content Test method EN 3030 (40 to 45) mass % Requirement 7 Flash point Test method EN ISO 1523 Requirement C null10 % ref. Value a, b 8  BAT Flow time (viscosity) Test method EN ISO 2431 Test condition  Requirement s null10 % ref. Value a, b 5 Sedimentation rating Test method EN 3847 Test condition As received in the original container. Requirement ml/4 h null10 % of ref. Value a, b 3  BAT Density Test method EN ISO 2811-1 to EN ISO 2811-4 or EN ISO 3675 Test condition ISO 3270 Requirement g/cm 3 null2 % of ref. Value a, b 10 Fineness of grind (Particle size) Test method EN ISO 1524 Requirement m 10 to 15  22 BAT Drying time - Test method EN ISO 9117-6 Print free test Panel CRS, Corrosion resistant austenitic steel or Ti, Titanium/Titanium alloy Pretreatment CRS: Abrasive blasting according to EN ISO 8504-2. or Ti: Abrasive blasting according to EN 2497  Ti: Anodising according to ISO 8080 Coating Coating to this standard. Test condition ISO 3270 Requirement h 0,5 ref. Value b 23 BAT Through Test method EN ISO 9117-1 dry time Panel CRS, Corrosion resistant austenitic steel or Ti, Titanium/Titanium alloy EN 3021:2017 (E) 11 Tests according to EN 3840 Test Test criteria Test requirements Pretreatment CRS: Abrasive blasting according to EN ISO 8504-2 or Ti: Abrasive blasting according to EN 2497  Ti: Anodising according to ISO 8080 Coating Coating to this standard. Test condition ISO 3270 Requirement h 0,5 ref. Value b a The deviation is that compared to the reference value (see Note b). b The reference value is that established during qualification. Table 3 Mechanical and physical characteristics Dried film Tests according to EN 3840 Test Test criteria Test requirements 24 BAT Cross cut Test method EN ISO 2409 Panel CRS, Corrosion resistant austenitic steel Ti, Titanium/Titanium alloy Pretreatment CRS: Abrasive blasting according to EN ISO 8504-2 Ti: Abrasive blasting according to EN 2497 or Ti: Anodising according to ISO 8080 Coating Coating to this standard. Test condition ISO 3270 Requirement Classification 1 24 Bend test Test method EN ISO 1519 Panel CRS, Corrosion resistant austenitic steel Ti, Titanium/Titanium alloy Pretreatment CRS: Abrasive blasting according to EN ISO 8504-2 Ti: Abrasive blasting according to EN 2497 or Ti: Anodising according to ISO 8080 Coating Coating to this standard. Test condition ISO 3270 Requirement ISO 1519 Mandrel 12 mm a a No cracking or detachment (null10 magnification). EN 3021:2017 (E) 12 Table 4 Environmental exposure / testing Dried film Tests according to EN 3840 Test Test criteria Test requirements 34 Water behaviour Test method EN ISO 2812-2 Panel CRS: Corrosion resistant austenitic steel Ti: Titanium/Titanium alloy Pretreatment CRS: Abrasive blasting according to EN ISO 8504-2 Ti: Abrasive blasting according to EN 2497  Ti: Anodising according to ISO 8080 Coating Coating to this standard. Exposure condition (40 2) C, 168 ha Requirementa EN ISO 2409, Classification 1 a EN ISO 4628-2, degree of blistering 0 ISO 1519 Mandrel 12 mmb 37 Humidity Test method EN ISO 6270-1 Panel CRS, Corrosion resistant austenitic steel Ti, Titanium/Titanium alloy Pretreatment CRS: Abrasive blasting according to EN ISO 8504-2 Ti: Abrasive blasting according to EN 2497  Ti: Anodising according to ISO 8080 Coating Coating to this standard. Exposure condition (40 null 2) C, ( 95 ) % RH, 168 h  Requirement a EN ISO 2409, Classification 1 a EN ISO 4628-2, degree of blistering 0 ISO 1519 Mandrel 12 mm b 38 Thermal Test method EN 4160 exposure Panel CRS, Corrosion resistant austenitic steel Ti, Titanium/Titanium alloy (Resistance to high temperature) Pretreatment CRS: Abrasive blasting according to EN ISO 8504-2 Ti: Abrasive blasting according to EN 2497  Ti: Anodising according to ISO 8080 Coating Coating to this standard. Exposure condition (180 2) C, 24 h Requirementa EN ISO 2409, Classification 1 a EN ISO 4628-2, degree of blistering 0 ISO 1519 Mandrel 12 mmb  a Tests to be performed at (23 null 2) C / (50 null 5) % RH, within 30 min after exposure. b No cracking or detachment (null10 magnification). EN 3021:2017 (E) 13 Table 5 Corrosion tests Dried film Tests according to EN 3840 Test Test criteria Test requirements 42 Corrosion of steel Test method EN 3026 Panel EN 3026 Pretreatment EN 3026 Coating Coating to this standard. Exposure condition 95 % RH, (23 null 2) C, 30 h  Requirement Visual examination. No discolouration, pits or any sign of corrosion indicating that the dry film lubricant has a corrosive effect. 42 Resistance to Test method EN ISO 9227 neutral salt Panel EN 3027 spray Pretreatment