Kl ass.-Nr. ass .-Nr. 50 23 4
May 2004
TL 260
Paint Paint Coating Coating of Metal Metal Surfaces . n r e v o g . l l e a t h a r s u n c o c i a s r e e b v o n t a d m e r v e e i l G e e b h s t i s e n i o c i t n a a l s p n e r a r c t s i h d s i l f g o n e E s a e c h n T I
Requirements Requirements for Surface Protection Konzernnorm Descriptors: surface protection, corrosion protection, paint, metal surface
Changes The following changes have been Specification TL 260, 1995-09: Standard restructured ! Referenced standards updated ! Ban on chromium (VI) and lead ! Changed requirements for weak points !
made
as
compared
to
Technical
Supply
Previous issues 1975-08; 1980-06; 1985-05; 1986-12; 1994-02; 1995-09 1
Scope
This standard defines requirements for corrosion protection of black paint coatings on metal surfaces (code letter x in Volkswagen standard VW 137 50), e.g., for body parts. It does not apply to paint coatings on zinc-coated metal surfaces (see TL 227), to decorative protective varnishes (see TL 218) or to paint coatings on chassis parts that may f orm cavities (see TL 262). 2
Designation
m r o N
See VW 137 50, Section 2. 3
Requirements
3.1 3.1
Protection types
The protection types listed in Table T able 1 apply. Table 1 Protection type
3 0 . 1 0 1 4 E F m r o F
Characteristic
Ofl-x010
Commercial paintwork, permissible only after agreement with the Central Laboratory at Volkswagen AG (K-QS-32) and/or the Test Laboratory at Audi AG (I/GQ-32) and the responsible Design Engineering Department; no corrosion protection requirements.
Ofl-x100, Ofl-x300, Ofl-x300, Ofl-x600
Pretreatment not specified specified (not possible possible for manufacturing manufacturing reasons), single-layer liquid paint according to any method, alternatively cathodic dip paint.
Ofl-x130, Ofl-x330
Zinc phosphated, phosphated, Fe or Mn phosphated, phosphated, single-layer liquid paint according to any method, alternatively cathodic dip paint.
Ofl-x630
Zinc phosphated, phosphated, cathodic dip paint. Page 1 of 4
Fachverantwortung/Responsibili Fachverantwortung/Responsibility ty K-QS-32
Koeppen
. e g a s u o t r o i r p e u s s i t n e r r u c r o f d r a d n a t s k c e h C / n e f ü r p t ä t i l a u t k A f u a g n u d n e w n A r o v
Normung/Standards (EZTD, 1733) Tel: -25803
Laudien
Wiesner
Tel: +49-5361-9-29064 +49-5361-9-29064
Sobanski
Page 2 TL 260: 2004-05
Protection type
Characteristic
Ofl-x631
Zinc phosphated, dual layer painted (dip + spray painting)
Ofl-x634
Zinc phosphated, heavy coat cathodic dip paint or cathodic dip paint + conventional dip paint (for very highly stressed parts, e.g., front end, engine compartment)
3.2
General requi rements
Approval of first supply and changes according to VW 011 55. Avoidance of hazardous substances according to VW 911 01. Eight parts or part sections are required for complete testing. The coatings used must be free of compounds containing chromium(VI) or lead. 3.3
Base material
Material according to drawing 3.4
Prot ectio n typ es/appearance
See Table 1. The color is always black unless otherwise specified in the drawing. 3.5
Conditioning
If air-drying coating systems are used and/or no paint system baking process at elevated temperature (> 60 °C) will be carried out, the components shall be conditioned for 24 h at 60 °C before the tests. The specimens are then cooled to room temperature (18 to 28) °C according to DIN 50014. 3.6
Paint coat thic kness
See Table 2. For joining and contact surfaces, paint coat thickness limits may be necessary which are to be specified in the drawing. Table 2 Protection type
Paint c oat thickn ess in µm
Ofl-x100, Ofl-x130, Ofl-x300, Ofl-x330, Ofl-x600 15 to 50 (for liquid paint) > 12 (for cathodic dip paint) Ofl-x630
15 to 35, in cavities ≥ 12
Ofl-x631
40 to 60
Ofl-x634
35 to 60, in cavities ≥ 20
3.7
Adhesion and brit tleness
Crosscut test according to DIN EN ISO 2409. Requirement: characteristic value 0 to 1. 3.8
Resist ance to stone impact
Test according to DIN 55996-1, method B with visual examination. Requirement:
≤ characteristic
value 2.
Page 3 TL 260: 2004-05
3.9
Further characteristics
See Table 3. Table 3 No.
Property
1
Corrosion behavior
Ofl-x100
1.1
After aging in salt spray fog according to DIN 50021-SS
1.1.1 48 h without scribe mark 2)
Ofl-x130
Ofl-x300
Ofl-x330
no blisters, no base metal corrosion
1.1.2 96 h without scribe mark 2)
Ofl-x630
Ofl-x631
Ofl-x634
no blisters, no base metal corrosion
-
no blisters, no base metal corrosion, adhesion loss D ≤ 2.5 mm
1.1.3 240 h with scribe mark 2) -
1.2
Ofl-x600
1)
-
After corrosion cycle test according to Test Specification PV 1210
1.2.1 5 cycles
-
surface, including edges, free of base metal corrosion
1.2.2 30 cycles with scribe mark 2)
-
no blisters, no base metal corrosion, adhesion loss D ≤ 2.5 mm
1.2.3 60 cycles with scribe mark 2)
1.3
no blisters, no base metal corrosion, adhesion loss D ≤ 2.5 mm
-
After aging in moisture condensate constant climate DIN 50017-KK
1.3.1 72 h 3)
no blisters, no base metal corrosion, the requirement according to Section 3.7 must be fulfilled
-
1.3.2 144 h 3)
no blisters, no base metal corrosion, the requirement according to Section 3.7 must be fulfilled
-
1.3.3 240 h 3)
-
-
no blisters, no base metal corrosion, the requirement according to Section 3.7 must be fulfilled
2
Resistance to chemicals acc. to VDA 621-412, test A, evaluation according to DIN EN ISO 4628-1, Table 3, with respect to
2.1
Premium unleaded gasoline acc. to DIN EN 228
-
max. characteristic value 2, but max. characteristic value 1 after 5 h resting period
max. characteristic value 1
2.2
Diesel fuel acc. to DIN EN 590
-
max. characteristic value 2, but max. characteristic value 1 after 5 h resting period
max. characteristic value 1
2.3
Factory-fill engine oil acc. to TL 521 07, 1 h at 23 °C 4)
-
max. characteristic value 2, but max. characteristic value 1 after 5 h resting period
max. characteristic value 1
Central hydraulic system fluid acc. to TL 521 46
-
max. characteristic value 2, but max. characteristic value 1 after 5 h resting period
max. characteristic value 1
Brake fluid acc. to TL 766
-
2.4
2.5 2.6
5)
max. characteristic value 2, but max. characteristic value 1 after 5 h resting period
Coolant acc. to TL 774, type C
2.6.1 1 h at 23 °C 4) 2.6.2 24 h at 80 °C
6)
-
max. characteristic value 2, but max. characteristic value 1 after 5 h resting period
-
characteristic value 0
1) The requirements of the next protection class down apply to surface areas on weld seams and design-related contact surfaces, including an adjacent zone of max. 2.5 mm starting from the weak point (surface/weld seam free of paint). 2) Scribe mark acc. to DIN EN ISO 7253, Section 8.5 and DIN EN ISO 4628-8 3) Then at least 30 min acclimatization at room temperature 4) For engine compartment parts only 5) For brake system parts only 6) For parts carrying coolant only
Page 4 TL 260: 2004-05
4
Referenced stand ards *)
PV 1210
Body and Add-On Parts; Corrosion Test
TL 766
Brake Fluid; Material Requirements
TL 774
Ethylene Glycol-Based Coolant Additive; Material Requirements
TL 521 07
SAE 15W-40 Factory Fill Engine Oil; Lubricant Requirements
TL 521 46
Central Hydraulic System Fluid; Lubricant Requirements
VW 011 55
Vehicle Supply Parts, General; Approval of First Supply and Changes
VW 137 50
Surface Protection of Metal Parts; Degrees of Protection, Codes, Requirements
VW 911 01
Vehicle Environmental Standard; Vehicle Parts, Materials, Operating Fluids; Avoidance of Hazardous Substances
VDA 621-412
Tests for Coating Methods; Resistance to Chemicals of Motor Vehicle Paints (only available in German)
DIN 50014
Climates and Their Technical Application; Standard Atmospheres
DIN 50017
Climates and Their Technical Application; Condensation Water Test Atmospheres
DIN 50021
Spray Tests with Different Sodium Chloride Solutions
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 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: General 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 t his section, terminological inconsistencies may occur as the original titles are used.
