3 Thermal range of application of the coated parts Continuous operational temperature range: JED to C to +80 C JED C to +120 C

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1 Specification Class: Coating Materials Class No.:29 Coating material for protection of reservoirs JED 745 Previous Edition Part name (for databases) Paint; Exterior protection of reservoirs JED replacement for CDS-273 JED replacement for CDS-273A JED replacement for CDS-312 JED replacement for SCMATL 60M 1 Scope The specification refers to protection of external surfaces of air reservoirs, featuring a high standard of salt spray resistance. The coating is applied to zinc phosphated steel. There are the following types: JED JED JED JED black epoxy powder paint with an extremely high corrosion resistance; red epoxy powder paint with a very high corrosion resistance; polyester powder paint with an extremely high corrosion resistance; black wet paint with a very high corrosion resistance. 2 General requirements Pretreatment, coating materials and method are to be selected in accordance with the requirements of this specification. A zinc phosphate coating is necessary as pretreatment. Mechanical or chemical descaling must be effected before applying the coating. Edges susceptible to corrosion, angles, welds, laps and hardly accessible areas are to be treated with special care. The coated surface must not show any visible roughness, pitting, dust inclusion etc. Mechanical resistance (to shock and impact) must be guaranteed everywhere. 3 Thermal range of application of the coated parts Continuous operational temperature range: JED to C to +80 C JED C to +120 C Short-term exposure to heat: JED to -2 1 h at +110 C JED h at +150 C Compiler Approved Product Group: 4961 Continuation page 2 to 5 Shanmugham Subramaniam JED.dot Template version 03 Hans Voss Doc. Code Language Rev en - C

2 JED-745 : Page 2 4 Pretreatment (zinc phosphate coating) 4.1 General description Treatment to be carried out on finished detail parts prior to welded assembly. The phosphate coated parts shall be smooth, and evenly covered with a very fine grained adherent coating. There shall be no patchiness and no contamination of the coating with rust, oil, grease or dirt etc. Finish paint coat shall be applied within 48 hours of phosphate completion. Finish paint coat must be applied within 24 hours of an oven drying operation i.e. re-phosphating of completed reservoir externals. 4.2 Cleaning Prior to phosphating, components must be free from grease and oil and all traces of rust and scale removed. Degreasing may be carried out by SOLVENT, EMULSION or ALKALINE cleaners. Rust and scale may be removed by shot blasting or pickling. Pickling in solutions containing hydrochloric acid is not recommended, as residual chloride ions can adversely affect the action of phosphating solutions and lower the corrosion resistance of the final coating. A thorough rinse is essential after the use of alkaline or emulsion cleaners and pickle solutions. 4.3 Phosphating Only phosphating solutions which have been approved by WABCO Laboratory can be used in the treatment of components to this specification (see Release of Suppliers). The phosphating solution must be operated and controlled within the limits recommended by the manufacturers in all respects. 4.4 Phosphate coating weight The phosphate coating weight shall be 2 to 5 g/m² when determined by the method given in the Appendix. For special applications a restricted range within these limits may be specified on the component drawing. In such cases the restricted range shall be at least ± 0,5 g/m². 4.5 Inspection and testing Satisfactorily phosphated work shall be smooth, uniform and matt in appearance, without flaking or excessive crystallinity. The strength of solutions and viscosity of dyes shall be controlled in accordance with the manufacturer's recommendations. The phosphate coating weight shall be determined in accordance with the Appendix at least once per week. A special test piece and its components shall be processed and the coating weight determined for restricted coating weights, which are unable to be obtained by standard working procedure

3 JED-745 : Page 3 5 Properties of finished paint film The desired values stated on the following pages shall be determined in accordance with the indicated test methods, but not before 24 hours after application and baking of the paint. To comply with the indicated requirements not only the quality of paint and coating, but also the material, pre-treatment and shape of the part may be of decisive influence. Therefore, the inspection shall be made on finished parts whenever possible. If a finished part is not suitable for being tested, samples must be agreed upon. If not indicated differently requirements apply to all types of JED-745. Ser. No. Test Requirements Test instruction 5.1 Colour JED and -3: black JED-745-1: red, L = to a = to b = to JED-745-2: see colour table 5.2 Degree of gloss JED-745-0: according to drawing, optional if no statement JED-745-1: 70% JED-745-2: see colour table JED-745-3: semi glossy ISO 7724 ISO Infrared spectrum According to sample 5.4 Thickness of coating 40 to 150 µm ISO Cross cut On supply After ageing 1) Adhesive tape test on cross cut on supply and after ageing 5.6 Bend test (cylindrical mandrel) Classification 0-1 Classification 0-1 No squares of paint must peel off. No spalling of paint. Cracks vertical to the bending direction are permissible. ISO 2409 ISO 1519 mandrel diameter m 13mm 5.7 Impact resistance JED to -2: 6,7 J pass BS 9300 E3 5.8 Hardness JED to -2: No scratching must be visible up to 45 N spring force JED-745-3: No scratching must breach base metal with 10 N spring force at least ISO

4 JED-745 : Page 4 Ser. No. Test Requirements Test instruction 5.9 Erichsen Pencil Hardness JED to -2: 3 H to 4 H ASTM D Cupping test JED to -2: 6 to 8 mm pass ISO Neutral salt spray test, NSS-test JED and -2: 500 h JED-745-1: 300 h ISO 9227 JED-745-3: 300 h (On component) 400 h (On panels) Blistering requirements according to EN 286 part 2 section Blisters < 0 (S0) ISO Creep resistance at scratch 5.12 Determination of resistance to humidity (continuous condensation) 5.13 Exterior exposure (6 months) JED to -2: 3 mm JED-745-3: 2 mm delamination after NSS-test, tested with adhesive tape JED to -2: 1000 h JED-745-3: 300 h No blistering or detachment JED and -1: Slight chalking permissible, protective properties unimpaired 5.14 Artificial weathering JED-745-2: No chalking, cracking or flaking 5.15 Outdoor testing JED-745-3: 12 weeks roof protected exposure ISO ISO CH-test BS 3900 F3 VOLVO STD 5711, Creep resistance at scratch General corrosion 6 mm Ri1 VOLVO STD 1027,1372 ISO Resistance to fuel oil No signs of permanent injury ISO 2812 one week at +18 C 5.17 Resistance to petrol (0,5 ml) 1) Artificial heat ageing Ageing has to be done at 120 ± 3 C for 48 h. No signs of permanent injury ISO min at +18 C 6 Sampling Test panels and test pieces must be prepared in an identical manner to the finished product and made from identical material. Test samples must be in accordance with EN 286 pt 2, section

5 JED-745 : Page 5 7 Guarantee 7.1 General The manufacturer is obliged to prove by regular random test that the requirements are observed, and to keep the documents referring to this inspection accessible to the customer. The current supplies must correspond to the released sample, the requirements of the present specification, and to the drawings. 7.2 Initial sample On each first delivery some initial samples and the initial sample inspection report are to be submitted for dimensional inspection and material test. 7.3 Changes The change of the basic materials, substantial characteristics of them (raw materials) or of the manufacturing process regardless of the kind of change and its reason is only permissible after previous release by the technical responsible departments. Appendix Colour Table (Approved Colours for JED-745-2) Colour Gloss Level (ISO 2813, measured under 60 ) Customer Reference Nos. Applicable Customers Black 60 to 70 % Leyland, DAF, IVECO, Ford (UK), Seddon Atkinson, Renault (UK), Volvo Bus (UK), GKN, JCB, Dennis S.V., Aftermarket Red-Rootic 70 % IC 105 IVECO Graphite Grey 80 % 1030 Volvo (Sweden) Auto Red 70 to 75 % 01733/93 Renault (France) Medium Grey 75 to 85 % 5502-B Swedish Standard Determination of phosphate coating weight Scania (Sweden) The coating weight shall be determined as follows: A piece of clean steel strip (composition as finished parts) to the dimensions of 50 mm x 75 mm with a 3mm hole in the upper part shall be processed with the phosphating solution along with a batch of work for the requisite time. The testpiece shall be rinsed thoroughly and submitted immediately to the Laboratory for testing to ISO 3892.