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1、AS 3566.22002 Australian Standard Self-drilling screws for the building and construction industries Part 2: Corrosion resistance requirements AS 3566.2 Licensed to Mr Exa Fast on 18 February 2009. 1 user personal user licence only. Storage, distribution or use on network prohibited (10009207). This
2、Australian Standard was prepared by Committee ME-029, Fasteners. It was approved on behalf of the Council of Standards Australia on 28 February 2002 and published on 19 March 2002. The following interests are represented on Committee ME-029: Australian Building Codes Board Australian Chamber of Comm
3、erce and Industry Australian Industry Group Bureau of Steel Manufacturers of Australia Electricity Supply Association of Australia Federal Chamber of Automotive Industries Institute of Materials Engineering Australasia Limited Metal Building Products Manufacturers Association Additional interests pa
4、rticipating in the preparation of this Standard: Galvanizers Association of Australia CSIRO, Building, Construction and Engineering Keeping Standards up-to-date Standards are living documents which reflect progress in science, technology and systems. To maintain their currency, all Standards are per
5、iodically reviewed, and new editions are published. Between editions, amendments may be issued. Standards may also be withdrawn. It is important that readers assure themselves they are using a current Standard, which should include any amendments which may have been published since the Standard was
6、purchased. Detailed information about Standards can be found by visiting the Standards Australia web site at .au and looking up the relevant Standard in the on-line catalogue. Alternatively, the printed Catalogue provides information current at 1 January each year, and the monthly magazine, The Aust
7、ralian Standard, has a full listing of revisions and amendments published each month. We also welcome suggestions for improvement in our Standards, and especially encourage readers to notify us immediately of any apparent inaccuracies or ambiguities. Contact us via email at .au, or write to the Chie
8、f Executive, Standards Australia International Ltd, GPO Box 5420, Sydney, NSW 2001. This Standard was issued in draft form for comment as DR 99515. Licensed to Mr Exa Fast on 18 February 2009. 1 user personal user licence only. Storage, distribution or use on network prohibited (10009207). AS 3566.2
9、2002 Australian Standard Self-drilling screws for the building and construction industries Part 2: Corrosion resistance requirements Originated as AS 35661988. Revised and redesignated in part as AS 3566.22002. COPYRIGHT Standards Australia International All rights are reserved. No part of this work
10、 may be reproduced or copied in any form or by any means, electronic or mechanical, including photocopying, without the written permission of the publisher. Published by Standards Australia International Ltd GPO Box 5420, Sydney, NSW 2001, Australia ISBN 0 7337 4386 2 Licensed to Mr Exa Fast on 18 F
11、ebruary 2009. 1 user personal user licence only. Storage, distribution or use on network prohibited (10009207). AS 3566.220022 PREFACE This Standard was prepared by the Standards Australia Committee ME-029, Fasteners to supersede (in part) AS 35661988, ScrewsSelf-drillingFor the building and constru
12、ction industries. The objective of this Standard is to provide manufacturers and users with the requirements for the corrosion resistance of self-drilling screws used in the building and construction industries. This Standard is Part 2 of a two-part series dealing with self-drilling screws for the b
13、uilding and construction industries. Part 1 specifies general requirements and the mechanical properties for self-drilling screws. This edition introduces an additional corrosion resistance class intended to meet the requirements for use in coastal areas and specifies a procedure for demonstration o
14、f corrosion resistance by exposure at an outdoor test site. The term normative has been used in this Standard to define the application of the appendix to which it applies. A normative appendix is an integral part of a Standard. Licensed to Mr Exa Fast on 18 February 2009. 1 user personal user licen
15、ce only. Storage, distribution or use on network prohibited (10009207). AS 3566.220023 CONTENTS Page 1SCOPE4 2REFERENCED DOCUMENTS4 3DEFINITIONS5 4CLASSIFICATION AND DESIGNATION5 5REQUIREMENTS FOR CORROSION RESISTANCE6 6ADHESION OF METALLIC COATINGS.9 7POROSITY OF MECHANICALLY PLATED ZINC AND ZINC-T
16、IN COATINGS.9 8COMPATIBILITY9 9MARKING10 APPENDICES APREPARATION OF CORROSION RESISTANT SELF-DRILLING SCREWS FOR ACCELERATED TESTING.12 BPROCEDURE FOR OUTDOOR EXPOSURE TESTING OF CORROSION RESISTANT SELF-DRILLING SCREWS14 CMETHOD FOR DETERMINING THE POROSITY OF MECHANICALLY PLATED ZINC AND ZINC-TIN
17、COATINGS18 DREQUIREMENTS FOR OUTDOOR EXPOSURE TEST SITE20 Licensed to Mr Exa Fast on 18 February 2009. 1 user personal user licence only. Storage, distribution or use on network prohibited (10009207). AS 3566.22002 Standards A.au 4 STANDARDS AUSTRALIA Australian Standard Self-drilling screws for the
18、 building and construction industries Part 2: Corrosion resistance requirements 1 SCOPE This Standard specifies the requirements for corrosion resistance of self-drilling screws used in the building and construction industries. 2 REFERENCED DOCUMENTS The following documents are referred to in this S
19、tandard: AS 1397Steel sheet and stripHot-dripped zinc-coated or aluminium/zinc- coated 1791Chromate conversion coatingsZinc and cadmium 2331Methods of test for metallic and related coatings 2331.1.1Method 1.1:Local thickness testsMicrographic examination of cross-sections 2331.1.3Method 1.3:Local th
20、ickness testsMagnetic method 2331.1.4Method 1.4:Local thickness testsMagnetic induction and eddy current methods 2331.3.1Method 3.1:Corrosion and related property testsNeutral salt spray (NSS) test HB 18Guidelines for third-party certification and accreditation HB 18.22Guide 22:Information on manufa
21、cturers declaration of conformity with Standards or other technical specifications AS/NZS 1580Paints and related materialsMethods of test 1580.408.2Method 408.2:AdhesionKnife test 1580.481.1.7Method 481.1.7:CoatingsExposed to weatheringDegree of checking 1580.481.1.8Method 481.1.8:CoatingsExposed to
22、 weatheringDegree of cracking 1580.481.1.9Method 481.1.9:CoatingsExposed to weatheringDegree of blistering 1580.481.1.10Method 481.1.10:CoatingsExposed to weatheringDegree of flaking and peeling 1748TimberStress-gradedProduct requirements for mechanically stress-graded timber 2312Guide to the protec
23、tion of iron and steel against exterior atmospheric corrosion Licensed to Mr Exa Fast on 18 February 2009. 1 user personal user licence only. Storage, distribution or use on network prohibited (10009207). AS 3566.22002 .au Standards Australia 5 ISO 8407Corrosion of metals and alloysRemoval of corros
24、ion products from corrosion test specimens 9223Corrosion of metals and alloysCorrosivity of atmospheres Classification 9226Corrosion of metals and alloysCorrosivity of atmospheres Determination of corrosion rate of standard specimens for the evaluation of corrosivity ASTM D2247Standard practice for
25、testing water resistance of coatings in 100% relative humidity G92Standard practice for characterization of atmospheric test sites G154Standard practice for operation flourescent light apparatus for UV exposure of nonmetallic materials DIN 50018Sulfur dioxide corrosion testing in a saturated atmosph
26、ere 3 DEFINITIONS For the purpose of this Standard, the definitions below apply. 3.1 Local thickness The mean of the coating thickness measurements, of which a specified number is made within a reference area. 3.2 Minimum local thickness The lowest value of the local thickness found on the significa
27、nt surface of a single article. 3.3 Reference area The area within which a specified number of single coating thickness measurements is required to be made. NOTE: For small items the reference area may be the whole of the significant surface. 3.4 Significant surface The part of the article covered o
28、r to be covered by the coating and for which the coating is essential for serviceability or appearance, or both and where the coating is required to meet all the specified requirements. 3.5 Significant surface of screw The head and undriven shank. 4 CLASSIFICATION AND DESIGNATION The corrosion resis
29、tance of self-drilling screws shall be classified by the corrosivity of the atmosphere of intended use and designated in accordance with Table 1. Licensed to Mr Exa Fast on 18 February 2009. 1 user personal user licence only. Storage, distribution or use on network prohibited (10009207). AS 3566.220
30、02 Standards A.au 6 TABLE 1 CLASSIFICATION AND DESIGNATION OF CORROSION RESISTANCE Corrosion resistance class Atmosphere of intended use 1General use in internal application. 2General use in other than external applications but where significant levels of condensation occurs. 3External use in mild,
31、moderate industrial or marine environments. Corrosivity categories C2 and C3 classified in accordance with ISO 9223. 4External use in severe marine environment. Corrosivity category C4 classified in accordance with ISO 9223. NOTE: The specification for self-drilling screws suitable for use in specif
32、ic corrosive atmospheres are subject to agreement between manufacturer and consumer. 5 REQUIREMENTS FOR CORROSION RESISTANCE 5.1 Class 1 Class 1 corrosion resistant screws shall comply with one of the following requirements: (a) Accelerated testing When Class 1 corrosion resistant self-drilling scre
33、ws are prepared in accordance with Appendix A and tested in a neutral salt spray in accordance with AS 2331.3.1 for 72 h red rust shall not be present over more than 5 percent of the significant areas of the screws and there shall be no blistering of the coating. (b) Zinc and zinc-tin coated screws
34、The metallic coating of zinc and zinc-tin coated Class 1 corrosion resistant screws shall be in accordance with Table 2. The local thickness of the metallic coating shall be determined in accordance with AS 2331.1.3 or AS 2331.1.4 and the minimum local coating thickness shall be determined from thre
35、e local thickness measurements made on the reference surface shown in Figure 1. 5.2 Class 2 Class 2 corrosion resistant screws shall comply with one of the following requirements: (a) Accelerated testing When Class 2 corrosion resistant self-drilling screws are prepared in accordance with Appendix A
36、 and tested as follows red rust shall not be present over more than 5 percent of the significant surfaces of the screws and there shall be no blistering of the coating: (i) In a neutral salt spray in accordance with AS 2331.3.1 for 240 h. (ii) In a condensing atmosphere containing sulfur dioxide at
37、level KFW 2.0S in accordance with DIN 50018 for 5 cycles. (iii) The assessment of the level of rusting shall be conducted visually so that no doubt can exist that corrosion of the steel substrate is well established. (b) Zinc and zinc-tin-coated screws The metallic coating of zinc and zinc-tin coate
38、d Class 2 corrosion resistant screws shall be in accordance with Table 2. The local thickness of the metallic coating shall be determined in accordance with AS 2331.1.3 or AS 2331.1.4 and the minimum local coating thickness shall be determined from three local thickness measurements made on the refe
39、rence surface shown in Figure 1. Licensed to Mr Exa Fast on 18 February 2009. 1 user personal user licence only. Storage, distribution or use on network prohibited (10009207). .au AS 3566.22002 7 Standards Australia TABLE 2 REQUIREMENTS FOR ZINC AND TIN-ZINC COATED FASTENERS Corrosion resistant clas
40、s Minimum porosity rating of mechanically plated coatings (see Clause 7) Coating type Coating composition (by mass) Minimum local metallic coating thickness Passivation m 1Electro plated zinc98 percent zinc4AS 1791Type C 2Electro plated zinc98 percent zinc12AS 1791Type C 26Mechanically plated zinc98
41、 percent zinc17AS 1791Type C 26Mechanically plated zinc-tin20-30 percent tin balance zinc 12AS 1791Type C 3Electro plated zinc98 percent zinc30AS 1791Type A, B, C or D 3Hot-dip galvanized98 percent zinc30AS 1791Type A, B, C or D 38Mechanically plated zinc98 percent zinc40AS 1791Type A, B, C or D 38M
42、echanically plated zinc-tin2030 percent tin balance zinc 25AS 1791Type A, B, C or D 4Hot-dip galvanized98 percent zinc50AS 1791Type A, B, C or D 48Mechanically plated zinc-tin25-30 percent tin balance zinc 45AS 1791Type A, B, C or D Licensed to Mr Exa Fast on 18 February 2009. 1 user personal user l
43、icence only. Storage, distribution or use on network prohibited (10009207). AS 3566.22002 Standards A.au 8 5.3 Class 3 The exposed portion of the heads of Class 3 corrosion resistant screws shall comply with one of the following requirements: (a) Accelerated testing Class 3 corrosion resistant self-
44、drilling screws prepared in accordance with Appendix A shall comply with the following requirements as appropriate: (i) When tested in a neutral salt spray in accordance with AS 2331.3.1 for 1000 h red rust shall not be present over more than 5 percent of the significant areas of the screws and ther
45、e shall be no blistering of the coating. (ii) When tested in a condensing atmosphere containing sulfur dioxide at level SFW 2.05 in accordance with DIN 50018 for 15 cycles, red rust shall not be present over more than 5 percent of the significant areas of the screws and there shall be no blistering
46、of the coating. (iii) When non-metallic (organic) coated corrosion resistant self-drilling screws are tested in an atmosphere of 100 percent relative humidity in accordance with ASTM D2247 for 1000 h there shall be no blister size S3 or larger or a blister density of 1 or greater in accordance with
47、AS 1580.481.1.9. (iv) When non-metallic (organic) coated corrosion resistant self-drilling screws are exposed to alternating ultraviolet and water with a test cycle of 4 h ultraviolet radiation of 60C and 4 h condensation at 50C in accordance with ASTM G154 for 2000 h there shall be no checking, cra
48、cking, or flaking and peeling with a rating greater than 0 in accordance with AS 1580.481.1.7, AS 1580.481.1.8 and AS 1580.481.1.10, respectively. (b) Outdoor exposure testing When Class 3 corrosion resistant self-drilling screws are tested at an outdoor test site in accordance with Appendix B there
49、 shall be no red rust present on the significant surfaces of 95 percent of the fasteners tested i.e., 95 of the 100 screws in the test panel. (c) Zinc and zinc-tin coated screws The metallic coating of zinc and zinc-tin coated Class 3 corrosion resistant screws shall be in accordance with Table 2. The local thickness of the metallic coating shall be dete