Group standard TL 52451Issue 2013-11

Class. No.: 50242

Descriptors: paint, paintwork, surface protection, multicoat paint, metal part, decorative, top coat, wiper arm, roofrails, pillar trim, paintwork on chrome surfaces

Painting of Metallic Decorative Add-on Parts for the Exterior

Requirements

Preface

This standard has been revised in collaboration with Porsche and supersedes Porsche TechnicalSupply Specification PTL 75201), issue 2008-02. Earlier issues of PTL 7520: 1979-04, 1979-10,1981-01.

Previous issues

TL 52451: 1996-06, 1998-07, 2003-05, 2008-08

Changes

The following changes have been made to TL 52451: 2008-08:– Section 1 "Scope" expanded– Section 2 "Description" changed– Section 3.1 "General requirements" supplemented– Porsche standards and requirements supplemented– Table 1 expanded– Table 2 supplemented and updated– Footnotes changed– Applicable documents updated

1) PTL 7520 = Volkswagen standard VW 96208

Always use the latest version of this standard.This electronically generated standard is authentic and valid without signature.The English translation is believed to be accurate. In case of discrepancies, the German version is alone authoritative and controlling.Numerical notation acc. to ISO/IEC Directives, Part 2.

Page 1 of 13

Technical responsibility The Standards departmentGQL-P/1 Marina Engelking Tel.: +49 5361 9 41793

GQL-M/1 Dr. Olaf Claus Tel.: +49 5361 9 194081

GQL Dr. Christian Achmus

EGW1 Dr. Christina Schmidt Tel.: +49 711 911 82604EKDV/4 Gabriela Bochynek EKDVTel.: +49 5361 9 21698 Maik Gummert

All rights reserved. No part of this document may be provided to third parties or reproduced without the prior consent of one of the Volkswagen Group’s Standards departments.© Volkswagen Aktiengesellschaft VWNORM-2012-05q

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Scope

This standard applies to paintwork on exterior add-on parts with metallic substrate that are in thevisible area and thus must fulfill predominantly decorative and functional requirements, e.g., roofrails, wiper arms, step, styling bar, pillar trims, chrome-plated and subsequently painted decorativeparts.

Description

Paintwork as per TL 52451, where necessary with additional specification of the surface protectionas per VW 13750 or for Porsche AG as per VW 96075 (Porsche standard PN 11011) (partially de‐viating surface indicators).Example 1: Paintwork requirements as per TL 52451

Structure surface protection Ofl-x630 (cathodic electrocoating) as perTL 260 + powder top coat

Example 2: Paintwork as per TL 52451Structure 1a + 3a + 3b as per table 1

Example 3: for Porsche packagesStructure Ofl-x603 (PTL 75182)) + powder top coat

Requirements

General requirements

Approval of first supply and changes as per VW 01155.Avoidance of hazardous substances as per VW 91101.The cutting burr on components must correspond at least to the manufacturing precision "medium"as per VW 01088.A minimum of 10 finished parts are required for a complete examination.The supplier must enclose the information as per section A.1 and the first-sample or development-sample test report with all parts to be tested.All ar[eas on the part to which the following requirements do not apply must be marked in the draw‐ing. Deviating requirements must be specified.The coating must not be damaged during correct installation.

Appearance

The parts must have a uniform appearance over their entire surface and comply with the drawingrequirements, the color standard, as well as the visual properties as per table 2. Pores, cracks, andother flaws that adversely affect the specified appearance are not permissible. Deviations from thismust be specified in the drawing.Gloss level, color, and structure are documented in the first-sample or development-sample test re‐port (incl. tested components or test plates).

1

2

3

3.1

3.2

2) PTL 7518 = VW 96207

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Open-air weathering

All painted components are tested as per VW 50185 (2 years in damp heat and 2 years in dryheat). The supplier is obligated to remove the cause for complaints occurring during this test and toimprove the paint system.

Painting process

The painting process must be coordinated between paint shop and paint manufacturer. Both par‐ties confirm the first-sample test report, meaning that both are responsible for fulfilling the specifiedrequirements. Responsibilities are broken down as follows:– The paint manufacturer provides information on the fulfillment of the requirements stipulated in

the Technical Supply Specification, processing guidelines, and support regarding the appliedpaint method.

– The paint shop provides information on the substrate and pretreatment steps, checks the re‐quirements at the earliest possible juncture, confirms that the paint manufacturer's processingguidelines are being adhered to, and requests assistance regarding the paint method used.

The blank manufacturer must provide information regarding the base material (substrate, pretreat‐ment, paintworks already applied) and ensure its suitability for further paintwork.

Paint structure/coat thicknesses

The coat thicknesses specified in table 1 (measurement as per DIN EN ISO 1463) only apply if ad‐ditional coats are used for the requirement as per VW 13750 or if there is no reference to a surfaceas per VW 13750. The specified coat materials must be adhered to in any event.The total paint coat thickness must not exceed 110 μm in a pure liquid paint structure.

In a structure containing powder coating, the total paint coat thickness must not exceed 150 μm3).Repainting is only possible if the same color is used. The total paint coat thickness in the event ofrepainting is limited to a maximum of 160 µm for the pure liquid paint structure and 200 µm for thepowder paint structure. The requirements of TL 52451 must also be fulfilled by means of a reliableprocess during repainting.The paint structure must comprise either:– a primer coat (1) and a single-layer top coat (2) as per table 1 or– a primer coat (1) and a double-layer top coat (3) as per table 1.In exceptional cases (e.g., powder top coat on pretreated aluminum substrates), a top coat struc‐ture only [as per table 1 (1) or (2)] can also be chosen; however, this must be expressly stipulatedin the drawing.

3.3

3.4

3.5

3) The following applies to Porsche AG: 230 µm for Mg substrates

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Table 1 – Coat thicknesses

Coat Coat material Standard valueCoat thickness

(μm)

0. PretreatmentDepending on the base material and its surface: mechanical (e.g.,abrasive blasting), passivation, phosphating, technical anodizing,etc. must be specified in the drawing

-

1. Primer coat

a Cathodic electrocoating 17 to 22

b Thick-layer cathodic electrocoating 25 to 35

c Liquid paint filler (binder base as desired) 25 to 35

d Powder filler (binder based on epoxy resin or polyester resin) 50 to 80

2. Single-layer top coat

a Powder top coat (polyester resin or acrylate resin base for mattepaints, acrylate resin base for high-gloss paints)

50 to 100

b Top coat (liquid paint, binder base: polyester, polyacrylate, polyur‐ethane)

20 to 40

3.Double-layertop coat

Coloringcoat

a Base coat (liquid paint, binder: cellulose acetate butyrate (CAB),acrylate, melamine, polyester systems)

10 to 20

Clearcoat

b Clear coat (liquid paint, binder: acrylate, polyester) 30 to 50

c Powder clear coat (acrylate resin-based binder; with use of pow‐ders with a polyester resin base, additional protection in the formof a further liquid clear coat layer is required)

50 to 100

Technological requirements

See table 2.

Conditioning of individual components

The parts must be one week old for the technological tests, or they must be aged before the testsfor 24 h at +60 °C.Aging and conditioning: 24 h in ISO 554 standard climate – 23 °C/50% rel. humidity. Deviationsfrom this must be noted in the test report.

3.6

3.6.1

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Table 2

No. Property Requirement

1 Visual properties

1.1 Reflectometer valueas per DIN EN ISO 2813

As per color template

1.2 Colorimetric evaluation As per VW 50195 in the as-received condition

1.3 Visual evaluation As per Test Specification PV 1065;

The following applies to Porsche AG: As per VW 96386 (PorscheTest Specification PPV 4025) in the as-received condition

1.4 Structure (standard values for dark, high-gloss colors),"wave-scan plus" measuring system, measurement as per the manufacturer'sspecifications a)

Horizontal surfaces:long wave <5short wave 10 to 25

Vertical surfaces:long wave <13short wave 10 to 30

The following applies to Porsche AG: Paint structure as perVW 96185-1 (PTL 5540-1)

2 Adhesion

2.1 Cross-cut testas per DIN EN ISO 2409 b) c)

Cross-cut test characteristic value ≤1

2.2 Stone-chip resistanceof the overall structure as perDIN EN ISO 20567-1, method B c)

Characteristic value ≤1,5 between the coats of paint with indicationof the main separation plane; isolated penetration points reachingthe substrate are permissible, but paint flaking is not permissible.

2.3 Pressure washer test as per PV 1503;Procedure following consultation with theappropriate department

Separation ≤0,5 mm

3 Corrosion resistance Zinc and zinc alloys,zinc-coated surfaces

Other metallic substrates

3.1 Corrosion cycle test of component ASSYs(as per table 2, consec. no. 3.1.1 or alternatively table 2, consec. no. 3.1.2.2 in consultation with the appropriatedepartment)

3.1.1 Corrosion cycle test as per PV 1210 withscribing line as perDIN EN ISO 9227, section C.4, evaluationas per DIN EN ISO 4628-8

After 10 cycles: loss of adhesiond ≤ 1 mm, but not greater than2,5 mm at any point on the part;after 60 cycles: no blisters and nobase metal corrosion d)

After 30 cycles: loss of adhesiond ≤ 2,5 mm, but not greater than5 mm at any point on the part; af‐ter 60 cycles: no blisters and nobase metal corrosion d)

3.1.2 The following applies to Porsche AG: Modified environmental cycle test; replacement test for table 2, con‐sec. no. 3.1.1

3.1.2.1 Individual components: Testing as per VW 96380 (PPV 4017)

Variant of VW 96380 (PPV 4017) de‐pending on the area of application

After 6 cycles: After 6 cycles:

- Surfaces: No base metal corro‐sion, no blisters, adhesivestrength as per table 2, con‐sec. no. 2.1 characteristicvalue ≤1

- Surfaces: No base metal corro‐sion, no blisters, adhesivestrength as per table 2, con‐sec. no. 2.1 characteristicvalue ≤1

- Evaluation using a scribe: Lossof adhesion d ≤ 1 mm

- Evaluation of the loss of adhe‐sion using a scribe: Steeld ≤ 2,5 mm, aluminum/magnesi‐um d ≤ 0,5 mm

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No. Property Requirement

3.1.2.2 Component ASSYs: Testing as per VW 96380 (PPV 4017)

Variant of VW 96380 (PPV 4017) de‐pending on the area of application

Corrosion protection requirement as per VW 96023-2 (PN 11019-2)

Preconditioning as per VW 96379(PPV 4015) – 1 cycle

After 12 cycles

3.2 240 h condensed water testas per DIN EN ISO 6270-2-CH and sub‐sequent conditioning in ISO 554 standardclimate – 23 °C/50% rel. humidity

- No corrosionEvaluate structures with water-based paints after 24 h conditioning;evaluate all other paints after 30 min conditioning:- Degree of blistering 0 (S0) as per DIN EN ISO 4628-1- Compliance with the requirement for adhesion (table 2, con‐sec. no. 2) is mandatory- No visual changes compared to the initial condition

3.3 Resistance to filiform corrosion as perDIN EN ISO 4623-2 and DIN EN 3665(only for aluminum substrates and in con‐sultation with the appropriate department)

- Filament length M < 5 filaments/cm, max. length L < 5 mm- Corrosion creepage on unground surfaces <10 mm2/cm- Corrosion creepage on ground surfaces <30 mm2/cm

3.4 240 h testing as per DIN EN ISO 9227-Copper-Accelerated Acetic Acid SaltSpray Fog Test (CASS) with scribing lineas per DIN EN ISO 9227, section C.4,evaluation as per DIN EN ISO 4628-8(only for aluminum substrates and in con‐sultation with the appropriate department)

- No spots, no haze, degree of blistering 0 (S0),degree of rusting Ri 0- Loss of adhesion d ≤ 2 mm, corrosion c ≤ 2 mm- After 30 min at room temperature: Cross-cut test as perDIN EN ISO 2409: ≤ characteristic value 1

3.5 For full-area paintwork on chrome surfa‐ces: 240 h testing as perDIN EN ISO 9227- CASS with priorstone-impact test as perDIN EN ISO 20567-1, method B c)

- No spots, no haze, degree of blistering 0 (S0),degree of rusting Ri 0- Loss of adhesion d ≤ 2 mm, corrosion c ≤ 2 mm- After 30 min at room temperature: Cross-cut test as perDIN EN ISO 2409: ≤ characteristic value 1

4 Resistance to temperature change

4.1 Heat aging in recirculated airfor 240 h at (+90 ±2) °C and subsequentconditioning for 30 min in ISO 554 stand‐ard climate – 23 °C/50% rel. humidity

The requirements in section 3.2 and table 2, consec. no. 2 must befulfilled.

4.2 Low-temperature aging after 24 h at(-40 ±3) °C and subsequent conditioningfor 30 min in ISO 554 standard climate – 23 °C/50% rel. humidity.The specimens from table 2, con‐sec. no. 4.1 are used. Only for compo‐nents with stone-impact stress caused bystones thrown up by the vehicle or othervehicles

The requirements in section 3.2 and table 2, consec. no. 2 must befulfilled.

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No. Property Requirement

4.3 Impact test with the specimens from ta‐ble 2, consec. no. 4.2 at (-40 ±3) °C e).Only for components with stone-impactstress caused by stones thrown up by thevehicle or other vehicles, in consultationwith the appropriate department

No flaking or cracks in the paintwork

4.4 50 cycles of the environmental cycle testas per PV 2005A andsubsequent conditioning for 24 h inISO 554 standard climate – 23 °C/50%rel. humidity

The requirements in section 3.2, table 2, consec. no. 1, andtable 2, consec. no. 2 must be fulfilled.

5 Resistance to chemicals

5.1 Pertinent agents:Following consultation with the appropriate department, the scope may be restricted to agents that are pertinentfor the application. The agreement must be documented in the drawing or Performance Specification.The following applies to Porsche AG: Requirements as per table 2, consec. no. 5.12

5.2 FAM test fuel as per DIN 51604-2 andDIN EN ISO 2812-4, method A, 10 min atroom temperature

Evaluation aftera) 1 h at room temperature;if changes occur, perform b)b) 2 h 60 °C reflow aging;no visible changes are permissible after b)

5.3 E10 gasoline as per DIN EN 228 (blendof super unleaded gasoline as perDIN EN 228 with 10 volume percent etha‐nol p.a.) and DIN EN ISO 2812-4, meth‐od A, 10 min at room temperature

5.4 B7 diesel fuel as per TL 788-B andDIN EN ISO 2812-4, method A, 10 min atroom temperature

5.5 Isopropanol as perDIN EN ISO 2812-4, method A, 10 min atroom temperature

5.6 5% sodium hydroxide solution (weightpercent) as perDIN EN ISO 2812-4, method A, 1 h atroom temperature

5.7 10% sulfuric acid (weight percent) as perDIN EN ISO 2812-4, method A, 1 h atroom temperature

5.8 10% hydrochloric acid (weight percent) asper DIN EN ISO 2812-4, method A, 1 h atroom temperature

5.9 Water (quality grade 3 as perDIN ISO 3696) as perDIN EN ISO 2812-4, method A, 1 h at80 °C

5.10 Tree resin as perDIN EN ISO 2812-4, appendix A.4.1,method A, 30 min at 45 °C

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No. Property Requirement

5.11 Bird feces substitute as perDIN EN ISO 2812-4, appendix A.4.5,method A, 30 min at 45 °C

5.12 The following applies to Porsche AG:Replacement test for table 2, con‐sec. no. 5.1 to 5.11Resistance to agents:Testing as per DIN EN ISO 2812-3,Test fluids as per VW 96041 (PN 710)Depending on the area of application, thetest fluids to be used must be agreedupon with the Porsche AG Materials Engi‐neering department.Evaluation as per DIN EN ISO 4628-1

Damage to the anti-corrosion coating, swellings, changes in color orglossRequirement: characteristic value ≤1The evaluation must be performed immediately after the end of load‐ing.If the requirements are not fulfilled, further evaluations must be per‐formed after 1 h and after 24 h.

6 Lightfastness and weather resistance (short-term tests)

6.1 Weathering in damp heat as per PV 3930(Florida test), 1 year cycle (YC) f)

For component surfaces that have an angle of ≥60° to the horizontalin the as-installed position and are not painted in body color.

6.2 Weathering in dry heat as per PV 3929(Kalahari test), 1 year cycle f)

No cracks, no color or gloss changes, visual properties after visualevaluation as per Table 2, consec. no. 1.3:Characteristic value <1 (very small difference, in other words scarce‐ly perceptible difference)Colorimetric characteristic values must be documented after weath‐ering (DIN EN ISO 11664-4, DIN EN ISO 11664-3 "Colorimetry –Part 3: CIE Tristimulus Values", DIN 5033-7 Measuring geometry45/0 or 0/45).Adhesion as per Table 2, consec. no. 2 is mandatory.

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No. Property Requirement

6.3 Weathering in damp heat as per PV 3930(Florida test), 2 year cycles f)

For component surfaces that are visible from a bird's-eye view andhave an angle of <60° to the horizontal in the as-installed positionand/or are painted in body color:

No cracks, no color or gloss changes, visual properties after visualevaluation as per table 2, consec. no. 1.3:Characteristic value<1 (very small difference, in other words scarcelyperceptible difference)Colorimetric characteristic values must be documented after weath‐ering (DIN EN ISO 11664-4, DIN EN ISO 11664-3 "Colorimetry –Part 3: CIE Tristimulus Values", DIN 5033-7 Measuring geometry45/0 or 0/45).Adhesion as per table 2, consec. no. 2 is mandatory.

6.4 Weathering in dry heat as per PV 3929(Kalahari test), 2 year cycles f)

6.5 Resistance of high-gloss clear coats a) toultraviolet radiation as per PV 1502,2 000 h

No visible formation of cracks on the clear coat

7 Resistance to open-air weathering

7.1 Open-air weathering in a damp/hot cli‐mate (Florida), as per DIN EN ISO 2810Am,deviating at an angle of 5° to the horizon‐tal. Duration: 2 years f)

No cracks, no color or gloss changes, visual properties after visualevaluation as per table 2, consec. no. 1.3:Characteristic value <1 (very small difference, in other words scarce‐ly perceptible difference)Colorimetric characteristic values must be documented after weath‐ering (DIN EN ISO 11664-4, DIN EN ISO 11664-3 "Colorimetry –Part 3: CIE Tristimulus Values", DIN 5033-7 Measuring geometry45/0 or 0/45).Adhesion as per table 2, consec. no. 2 is mandatory.

7.2 Open-air weathering in a hot/dry climate(Kalahari), as per DIN EN ISO 2810 Bwh,deviating at an angle of 5° to the horizon‐tal. Duration: 2 years f)

8 Car wash resistance

8.1 Scratch resistance as per PV 3.3.3 forhigh-gloss paintwork a) g)

VE ≥ 1VR ≥ 1 after reflow

9 Hardness test

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No. Property Requirement

9.1 The following applies to Porsche AG andwhere specified in a drawing requirement:The hardness test must be performed us‐ing a hardness test pencil (Erichsentype 318):- Diameter of engraving tip: 1,0 mm- Testing force: 8 N

Evaluation as per German Association of the Automotive Indus‐try (VDA) volume 16 "Quality Management in the Automotive Indus‐try; Decorative Surfaces of External Fittings and Functional Parts inthe Internal and Externals of Automobiles";The testing force required to produce a visible indentation must bespecified in the first-sample test report.

10 Resistance totransit coating filmThe transit coating film intended for theapplication is applied to the paintworkwith air bubbles remaining beneath thefilm and then aged for 8 cycles as perPV 1200.

Marks in the transition to the non-taped area and under the film areimpermissible. Reversible swellings (after 24 h at room temperature)are permissible. There must be no adhesive residues after the transitcoating film is removed.

a) Top coats with a reflectometer value of ≥70 at 60° as per DIN EN ISO 2813 are defined as high-gloss paints.b) In the case of cross-cut test characteristic values >1, the result must be verified by means of further adhesion tests (e.g., stone-

impact test).c) Tesa 4657 must be used as the adhesive tape.d) Deviating from this, wiper arms are evaluated as per TL 934.e) Impact test as per DIN ISO 4532, however, with a specified testing force of 90 N on a rigid base plate.f) High-gloss coatings must be cleaned with a paint cleaning agent before the evaluation; matte coatings must be cleaned with an

aqueous solution containing tensides.g) For high-gloss paintwork: Reference clear coat ALD 069 050, made by BASF; reference sheets are available from Volks‐

wagen PMP-L/C2.

Applicable documents

The following documents cited in this standard are necessary to its application.Some of the cited documents are translations from the German original. The translations of Ger‐man terms in such documents may differ from those used in this standard, resulting in terminologi‐cal inconsistency.Standards whose titles are given in German may be available only in German. Editions in otherlanguages may be available from the institution issuing the standard.

PV 1065 Chrome-Plated Surfaces; Determination of Potential Differences andLayer Thicknesses of Nickel Coatings

PV 1200 Vehicle Parts; Testing of Resistance to Environmental Cycle Test(+80/-40) °C

PV 1210 Body and Add-on Parts; Corrosion TestPV 1502 Clear Coat for Dual-Layer Metallic Paint Coatings; Testing for Resist‐

ance to CrackingPV 1503 Paint Coating of Metallic and Non-Metallic Materials; Pressure Washer

TestPV 2005 Vehicle Parts; Testing of Resistance to Environmental Cycle TestPV 3.3.3 Paints and Varnishes; Scratch Resistance Testing of Clear CoatsPV 3929 Non-Metallic Materials; Weathering in Dry, Hot Climate

4

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PV 3930 Non-Metallic Materials; Weathering in Moist, Hot ClimateTL 260 Paint Coating of Metal Surfaces; Requirements for Surface ProtectionTL 788 Diesel Fuel; Fuel RequirementsTL 934 Wiper Systems; Function and Material RequirementsVW 01088 Workpiece Edges; Definitions, Drawing SpecificationsVW 01155 Vehicle Parts; Approval of First Supply and ChangesVW 13750 Surface Protection of Metal Parts; Surface Protection Types, CodesVW 50185 Vehicle Parts; Resistance to Open-Air WeatheringVW 50195 Colorimetric Evaluation of Automobile Paint CoatingsVW 91101 Environmental Standard for Vehicles; Vehicle Parts, Materials, Operat‐

ing Fluids; Avoidance of Hazardous SubstancesVW 96023-2 PN 11019-2 - Karosserie/Elektrik; Korrosionsanforderungen; Teil 2: nach

modifizierter KlimawechselprüfungVW 96041 PN 710 - Gesamtfahrzeug; Prüfmedien - WerkstoffverträglichkeitVW 96075 PN 11011 - Oberflächenschutz für Teile aus Metall; Grundlagen und

ÜbersichtVW 96185-1 Paintwork; Evaluating Surface Flaws on Painted Body Parts and Add-On

Parts; Part 1: BasicsVW 96207 PTL 7518 - Oberflächenschutz; Lackierung / Pulverbeschichtung metalli‐

scher Fahrzeugteile (Oberflächen x301, x601, x602, x603, x604, x651);Anforderungen und Prüfungen

VW 96379 Exterior; Testing of Add-on Parts; Climatic TestVW 96380 Surface Protection; Corrosion Test - Modified Environmental Cycle TestVW 96386 PPV 4025 - Exterieur, Lackierung; Farbtonkontrolle; lackierte Karosser‐

ie- und AnbauteileDIN 5033-7 Colorimetry; measuring conditions for object coloursDIN 51604-2 Methanolic FAM testing fluid for polymer materials; composition and re‐

quirementsDIN EN 228 Automotive fuels - Unleaded petrol - Requirements and test methodsDIN EN 3665 Aerospace series - Test methods for paints and varnishes - Filiform cor‐

rosion resistance test on aluminium alloysDIN EN ISO 11664-3 Colorimetry - Part 3: CIE tristimulus valuesDIN EN ISO 11664-4 Colorimetry - Part 4: CIE 1976 L*a*b*Colour spaceDIN EN ISO 1463 Metallic and oxide coatings - Measurement of coating thickness - Micro‐

scopical methodDIN EN ISO 20567-1 Paints and varnishes - Determination of stone-chip resistance of coat‐

ings - Part 1: Multi-impact testingDIN EN ISO 2409 Paints and varnishes - Cross-cut test

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DIN EN ISO 2810 Paints and varnishes - Natural weathering of coatings - Exposure andassessment

DIN EN ISO 2812-3 Paints and varnishes - Determination of resistance to liquids - Part 3:Method using an absorbent medium

DIN EN ISO 2812-4 Paints and varnishes - Determination of resistance to liquids - Part 4:Spotting methods

DIN EN ISO 2813 Paints and varnishes - Determination of specular gloss of non-metallicpaint films at 20°, 60° und 85°

DIN EN ISO 4623-2 Paints and varnishes - Determination of resistance to filiform corrosion -Part 2: Aluminium substrates

DIN EN ISO 4628-1 Paints and varnishes - Evaluation of degradation of coatings - Designa‐tion of quantity and size of defects, and of intensity of uniform changesin appearance - Part 1: General introduction and designation system

DIN EN ISO 4628-8 Paints and varnishes - Evaluation of degradation of coatings - Designa‐tion of quantity and size of defects, and of intensity of uniform changesin appearance - Part 8: Assessment of degree of delamination and cor‐rosion around a scribe or other artificial defect

DIN EN ISO 6270-2 Paints and varnishes - Determination of resistance to humidity - Part 2:Procedure for exposing test specimens in condensation-water atmos‐pheres

DIN EN ISO 9227 Corrosion tests in artificial atmospheres - Salt spray testsDIN ISO 3696 Water for analytical laboratory use; specification and test methodsDIN ISO 4532 Vitreous and porcelain enamels - Determination of the resistance of

enamelled articles to impact - Pistol testGerman Association ofthe AutomotiveIndustry (VDA)volume 16

Quality Management in the Automotive Industry; Decorative Surfaces ofExternal Fittings and Functional Parts in the Internal and Externals ofAutomobiles

ISO 554 Standard atmospheres for conditioning and/or testing; Specifications

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Supplier details on the specimen part

1. Part designations and numbers2. Blank manufacturer3. Base material (manufacturer, manufacturer designation and VDA designation)4. Cleaning and pretreatment methods5. Paint shop, painting location, painting plant6. Painting datePaint structure and painting procedure for all layers. See table A.1 for sample details for a primercoat.

Table A.1

Primer coat Paint manufacturer Trade name (product number), product datasheet

Water/solvent; one-component/two-component,powder

Binder base For two-component paint systems, specifica‐tions for hardener

- Manufacturer - Manufacturer designation, product data sheetif any

- Chemical basis - Ratio of master paint to hardener Baking temperature Baking duration Desired coat thickness Application method

Appendix A (informative)

A.1