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1、Klass.-Nr. 50 23 2 August 2004 Powder Paint on Metal Surfaces Requirements for Surface Protection TL 256 Konzernnorm Descriptors: powder paint, surface protection, corrosion protection, paint, paintwork Page ? ? Fachverantwortung/Responsibility Normung/Standards (EZTD, 1733) K-QS-32 Groe Tel: -28506
2、 Laudien Dr. Eisenberg Wiesner Tel: +49-5361-9-29064 Sobanski Confidential. All rights reserved. No part of this document may be transmitted or reproduced without the prior written permission of a Standards Department of the Volkswagen Group. Parties to a contract can only obtain this standard via t
3、he responsible procurement department. VOLKSWAGEN AG Norm vor Anwendung auf Aktualitt prfen / Check standard for current issue prior to usage. Form FE 41 - 01.03 Changes The following changes have been made as compared to Technical Supply Specification TL 256, 1999-06: ? Type A changed to surface pr
4、otection type Ofl-x651 ? Type B removed (replacement is TL 524 51) ? Specifications for pretreatment changed (Table 2, No. 4) ? Salt spray fog test removed ? Specifications for the corrosion cycle test changed (Table 2, No. 8.1) ? Referenced standards updated ? Standard restructured Previous issues
5、1974-10; 1993-09; 1999-06 1 Scope This standard specifies the requirements for powder paints on pretreated components. It does not apply to decorative surfaces (see TL 524 51) or aluminum wheels (see TL 239). 2 Designation According to Volkswagen standard VW 137 50, Section 2. 3 Requirements 3.1 Pro
6、tection types The surface protection types listed in Table 1 shall apply. Table 1 Protection type Design Ofl-x650 heavy protection with film- or layer-forming pretreatment Ofl-x651 especially heavy protection with film or layer-forming pretreatment and primer coat (use in the visible area, for examp
7、le) The English translation is believed to be accurate. In case of discrepancies the German version shall govern. Page 2 TL 256: 2004-08 3.2 General requirements Approval of first supply and changes according to VW 011 55. Avoidance of hazardous substances according to VW 911 01. Ten parts are requi
8、red for complete testing. 3.3 Weak spots Weak spots are edges of an area that was mechanically worked after coating for design reasons (in a zone of max. 2.5 mm width, starting from the edge of the unpainted surface). 3.4 Appearance The parts shall exhibit a uniform appearance on their entire surfac
9、e, according to drawing and released sample. Pores, coarse cracks, and other flaws or damage that adversely affect the specified appearance are not permissible. The coating shall have firm adherence to the base material. 3.5 Further properties See Table 2. Table 2 No. Property Requirement Ofl-x650 O
10、fl-x651 1 Base material see drawing 2 IR spectrum of the powder paint acc. to sample * 3 Degree of glossiness degree of glossiness according to original sample or drawing specification 4 Pretreatment and primer coat 4.1 Steel zinc phosphated zinc phosphated and primed 4.2 Zinc passivated passivated
11、and primed 4.3 Aluminum passivated passivated and primed 4.4 Copper - primed 5 Coating thickness 5.1 Primer coat - 25 5 m 5.2 Powder paint ? 60 m 6 Adhesion and brittleness (crosscut test acc. to DIN EN ISO 2409) Gt 0 to 1 7 Resistance to stone impact acc. to DIN 55996-1 max. characteristic value 1
12、* The IR samples must be presented by the supplier during the first sample tests. Page 3 TL 256: 2004-08 No. Property Requirement 8 Corrosion behavior 8.1 Corrosion cycle test 1) no blisters, no corrosion of base metal; adhesion loss D ? 2.5 mm, but never 5 mm 8.2 Test in the moisture-condensate con
13、stant climate 2) no blisters, no corrosion of base metal; the requirements of Section 3.5 and Table 2, No. 6 must be fulfilled 9 Temperature resistance (temperature cycle test) 9.1 Aging at elevated temperature 3) 9.2 Aging at low temperature 4) requirements of Section 3.5 and Table 2, No. 6 must be
14、 fulfilled 10 Impact test at low temperature 5) no chipping and no cracks of the coating; impact shall not reach base material 6) 11 Resistance to chemicals 7) 11.1 Premium unleaded gasoline acc. to DIN EN 228 11.2 Diesel fuel acc. to DIN EN 590 11.3 Respectively released sealant and sealant remover
15、 max. characteristic value 1 1) 60 cycles according to Test Specification PV 1210 with scribing line according to DIN EN ISO 7253, Section 8.5. Evaluation according to DIN EN ISO 4628-8. 2) Test according to DIN 50017-KK, test duration 240 h; the specimens are then acclimatized for at least 30 minut
16、es at (18 to 28) C. 3) 240 h aging in the mechanical circulation oven at (+90 + 2) C; the specimens are then acclimatized for at least 30 minutes at +(18 to 28) C. 4) After aging at elevated temperature (Table 2, No. 9.1), the same specimens are aged at low temperatures for 24 h at (-40 + 3) C; next
17、 the specimens are acclimatized for at least 30 min at (+18 to 28) C. Afterwards, these same specimens are tested according to Table 2, No. 10. 5) Impact test after 24 h aging at (-40 + 3) C on the basis of DIN EN ISO 4532, but with a specified test force of 90 N on a rigid substrate. 6) In the case
18、 of stabilizers, impacts of up to 3 mm in diameter which extend down to the base material and are caused by the test method are permitted. 7) Test according to VDA test sheet 621-412, test A; evaluation according to DIN EN ISO 4628-1, Table 3. Page 4 TL 256: 2004-08 4 Referenced standards*) PV 1210
19、Body and Add-on Parts; Corrosion Test VW 011 55 Vehicle Supply Parts; Approval of First Supply and Changes VW 137 50 Surface Protection of Metal Parts; Degrees of Protection, Codes, Requirements VW 911 01 Environmental Standard for Vehicles; Vehicle Parts, Materials, Operating Fluids; Avoidance of H
20、azardous Substances VDA 621-412 Anstrichtechnische Prfungen, Chemikalienbestndigkeit von Kraftfahrzeug- Lackierungen (Tests for Coating Methods, Resistance to Chemicals of Automotive Paints only available in German) DIN 50017 Atmospheres and Their Technical Application; Condensation Water Test Atmos
21、pheres DIN 55996-1 Paints and Varnishes Stone Chip Resistance Test for Coatings Part 1: Multi Impact Test DIN EN 228 Automotive Fuels Unleaded Petrol Requirements and Test Methods DIN EN 590 Automotive Fuels Diesel Requirements and Test Methods DIN ISO 4532 Vitreous and Porcelain Enamels Determinati
22、on of the Resistance of Enameled Articles to Impact Pistol Test DIN EN ISO 2409 Paints and Varnishes Cross-Cut Test DIN EN ISO 4628-1 Paints and Varnishes Evaluation of Degradation of Coatings Designation of Quantity and Size of Defects, and of Intensity of Uniform Changes in Appearance Part 1: Gene
23、ral Introduction and Designation System DIN EN ISO 4628-8 Paints and Varnishes Evaluation of Degradation of Coatings; Designation of Quantity and Size of Defects, and of Intensity of Uniform Changes in Appearance Part 8: Evaluation of Corrosion around a Scribe DIN EN ISO 7253 Paints and Varnishes Determination of Resistance to Neutral Salt Spray (Fog) *) In this section, terminological inconsistencies may occur as the original titles are used.