AS/NZS 2728:2007 2728:2007
A S / N Z S 2 7 2 8 : 2 0 0 7
Australian/New Zealand Standard ™ . m o c . l a b o l g i a s . e r o t s o f n i / / : p t t h t a n o i s r e v l l u f e h t s s e c c A . e l p m a s e g a p 6 e e r f a s i s i h T
Prefinished/prepainted sheet metal Prefinished/prepainted products for interior/exterior building applications—Performance requirements
AS/NZS 2728:2007
This Joint Australian/New Zealand Standard was prepared by Joint Technical Committee MT-009, Metal Finishing. It was approved on behalf of the Council of Standards Australia on 8 December 2006 and on behalf of the Council of Standards New Zea lan land d on o n 20 Dec embe r 20 06. This Standard was published on 20 February 2007.
The following are represented on Commit tee MT-009:
. m o c . l a b o l g i a s . e r o t s o f n i / / : p t t h t a n o i s r e v l l u f e h t s s e c c A . e l p m a s e g a p 6 e e r f a s i s i h T
Australasian Institute of Metal Finishing Australian Aluminium Council Australian Chamber of Commerce and Industry Australian Industry Group Australian Paint Manufacturer's Federation Bureau of Steel Manufacturer's of Australia Galvanizers Association of Australia Galvanizing Association of New Zealand Institute of Materials Engineering Australasia Society of Automotive Engineers – Australia Additional Interests: New Zea lan land d Stee S tee l Pacific Coilcoaters
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This Standard was issued in draft form for comment as DR 06305.
AS/NZS 2728:2007 2728:2007
Australian/New Zealand Standard ™ . m o c . l a b o l g i a s . e r o t s o f n i / / : p t t h t a n o i s r e v l l u f e h t s s e c c A . e l p m a s e g a p 6 e e r f a s i s i h T
Prefinished/prepainted sheet metal Prefinished/prepainted products for interior/exterior building applications— applications —Performance requirements
Originated as AS 2728—1984. Previous edition AS/NZS 2728:1997. Third edition 2007.
COPYRIGHT
© Standards Australia/Standards New Zealand All rig hts are res erv ed. No part of thi s wor k may be rep rod uced or cop ied in any for m or by any means, electronic or mechanical, including photocopying, without the written permission of the publisher. Jointly published by Standards Australia, GPO Box 476, Sydney, NSW 2001 and Standards New Zealand, Private Ba g 2439, Wellington 6020
AS/ NZS 2728 :200 7
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PREFACE
This Standard was prepared by the Joint Standards Australia/Standards New Zealand Committee MT-009, Metal Finishing, at the request of industry, to supersede AS/NZS 2728:1997, Pref Prefinis inished/ hed/prep prepaint ainted ed shee sheett meta metall pro product ductss for inte interior rior/ext /exterio eriorr building applications—Performance requirements. requirements . The objective of this Standard is to specify the requirements for prefinished sheet and strip intended for fabrication into products for use in the building industry. The objective of this revision is to specify new testing requirements and procedures for prefinished/prepainted prefinished/prepaint ed sheet metal products. . m o c . l a b o l g i a s . e r o t s o f n i / / : p t t h t a n o i s r e v l l u f e h t s s e c c A . e l p m a s e g a p 6 e e r f a s i s i h T
No int interna ernatio tional nal (IS (ISO) O) Stan Standard dardss are ar e avail a vailable able on this sub subject. ject. The terms ‘normative’ and ‘informative’ have been used in this Standard to define the application of the appendix to which they apply. A ‘normative’ appendix is an integral part of a Standard, whereas an ‘informative’ appendix is only for information and guidance.
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AS/ NZS 2728 :200 7
CONTENTS
Page
SECTION 1 SCOPE AND GENERAL 1.1 SCOPE ............................... ................................................................. ..................................................................... ....................................................... .................... 4 1.2 REFERENCED DOCUMENTS .................................. .................................................................... ................................................ .............. 4 1.3 DEFINITIONS .............................. ................................................................ ..................................................................... ............................................ ......... 6 1.4 SAFETY............................................................................................ SAFETY...................................................................................................................... .......................... 6 1.5 PRODUCT TYPES................... TYPES..................................................... .................................................................... ................................................. ............... 6 1.6 PRODUCT FINISHES .............................. ................................................................ .................................................................. ................................ 7 1.7 SURFACE PROTECTION..................................................... PROTECTION....................................................................................... ..................................... ... 8 . m o c . l a b o l g i a s . e r o t s o f n i / / : p t t h t a n o i s r e v l l u f e h t s s e c c A . e l p m a s e g a p 6 e e r f a s i s i h T
SECTION 2 PERFORMANCE REQUIREMENTS FOR PREFINISHED PREFINISHED METAL METAL PRODUCTS 2.1 SCOPE OF SECTION ............................... ................................................................. .................................................................. ................................ 9 2.2 APPEARANCE APPEARANCE .............................. ................................................................ .................................................................... ........................................... ......... 9 2.3 SPECULAR GLOSS (PRODUCT SPECIFICATI SPECIFICATION) ON) ................................ ................................................ ................ 9 2.4 DRY FILM THICKNESS................................ THICKNESS.................................................................. .......................................................... ........................ 10 2.5 REVERSE IMPACT RESISTANCE OF PREPAINTED PRODUCTS ..................... 10 2.6 ADHESION....................................................................................... ADHESION............................................................................................................... ........................ 11 2.7 SCRATCH RESISTANCE ............................... ................................................................. ......................................................... ....................... 11 2.8 DURABILITY OF THE ORGANIC FILM ................................. ............................................................... .............................. 12 2.9 HUMIDITY RESISTANCE .................................. .................................................................... .................................................... .................. 13 2.10 CORROSION RESISTANCE (APPLICABLE (APPLICABLE TO PRODUCT PRODUCT TYPES 3, 4, 5 AND 6).............................................................................................. 6)...................................................................................................................... ........................ 14
APPENDICES A PURCHASING GUIDELINES....................................................... GUIDELINES.................................................................................. ........................... 16 B MEANS OF DEMONSTR DEMONSTRATING ATING COMPLIANCE WITH THIS STANDARD........ 17 C ATMOSPHERIC ENVIRONMENTS.......... ENVIRONMENTS.............................................. .............................................................. .......................... 19 D SELECTION AND PREPARATION OF TEST PANELS .................................... ........................................ .... 22 E REVERSE IMPACT TEST ................................. ..................................................................... ...................................................... .................. 24 F T-BEND ADHESION TEST ................................... ....................................................................... .................................................. .............. 26 G BALL ADHESION TEST FOR ORGANIC FILM/METAL LAMINATE ................ 29 H PROCEDURES FOR TESTING DURABILITY AND CORROSION RESISTANCE ................................... ....................................................................... ....................................... ... 32 I ACCELERATED CORROSION TESTS................................... TESTS................................................................... ................................ 33 J NEW ZEALAND AND AUSTRALIAN CORROSION TEST SITES ...................... 36 K ADVICE ON WEATHERING PERFORMANCE OF FABRICATED PREPAINTED AND ORGANIC FILM/METAL LAMINATE PRODUCTS ................................ .................................... .... 41 L STORAGE AND HANDLING OF PRODUCTS................................. PRODUCTS....................................................... ...................... 43 M SAFETY GUIDELINES FOR PAINTED COATINGS ................................... ............................................. .......... 44 N PROCEDURES PROCEDURE S FOR TESTING DURABILIT DURABILITY Y AND CORROSION C ORROSION RESISTANCE IN NATURALLY UNWASHED AREAS ................................ ................................................................. ................................. 46 O FOUR YEAR INSTRUMENTAL COLOUR DURABILITY EXPECTATIONS FOR ORGANIC COATING SYSTEMS SYSTEMS EXPOSED EXPOSED AT SUNSHINE SUNSHINE SITES ........... 47
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AS/ NZS 2728 :200 7
STANDARDS AUSTRALIA/STANDARDS NEW ZEALAND
Australian/New Zealand Standard Prefinished/prepainted sheet metal products for interior/exterior building applications—Performance requirements
S E C T I O N 1.1
. m o c . l a b o l g i a s . e r o t s o f n i / / : p t t h t a n o i s r e v l l u f e h t s s e c c A . e l p m a s e g a p 6 e e r f a s i s i h T
1
S C O P E
A N D
G E N E R A L
SCOPE
This Standard specifies performance requirements for prepainted and organic film/metal laminate products in sheet and strip form that are coated on one or both sides, and that are intended for fabrication into products for use in the construction or finishing of buildings. The Standard classifies prefinished/prepainted metal products into six types according to their performance, in respect to durability and aesthetics, in environments of varying severity. NOTE S: 1
Advice and recommendations on information to be supplied supplied by the purchaser at the time of enquiry or order are contained in the purchasing guidelines set out in Appendix A.
2
To demonstrate a means of compliance to this Standard refer to Appendix B.
3
The performance performance of a coating coating will be dependent on the corrosion resistance of the substrate in the particular environment and on climatic influences that directly affect the coating. Such influences include solar radiation and the presence of water vapour (see Appendix C).
4
A guide for the safe application application for paint products products on metallic substrates is shown in Appendix M.
5
Appendix N sets out an interim procedure for the testing durability and and corrosion corrosion resistance in naturally unwashed areas.
1.2
REFERENCED DOCUMENTS
The following documents are referred to in this Standard: AS 1199 1199.0 1199.1
Sampling procedures for inspection by attributes Part 0: Introduction to the ISO 2859 attribute sampling system Part 1: Sampling schemes indexed by acceptance quality limit (AQL) for lot-by-lot inspection
1397
Steel sheet and strip — Hot-dipped Hot-dipped zinc-coated or aluminium/zinc-coated
1580 1580.408.4 1580.481.3
Paints and related materials — Methods Methods of test Method 408.4: Adhesion (cross-cut) Method 481.3: Coatings — Exposed Exposed to weathering — Degree Degree of corrosion of coated metal substrates
1734
Aluminium and aluminium alloys — Flat Flat sheet, coiled sheet and plate
2313
Methods of test for single sided and double sided pressure-sensitive adhesive tape
2313.1.1
Method 1.1:
2331
Methods of test for metallic and related coatings
Adhesion — Peel Peel adhesion
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. m o c . l a b o l g i a s . e r o t s o f n i / / : p t t h t a n o i s r e v l l u f e h t s s e c c A . e l p m a s e g a p 6 e e r f a s i s i h T
AS/NZS 2728:2007, Prefinished/prepainted sheet metal products for interior/exterior building applications - Performance requirements
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