AS 2345-1992

1 - AS 2345-1992 DEZINCIFICATION RESISTANCE OF COPPER ALLOYS
4 - PREFACE
4 - CONTENTS
5 - FOREWORD
6 - 1 SCOPE
6 - 2 REFERENCED DOCUMENTS
6 - 3 DEFINITIONS
6 - 3.1 Dezincification
6 - 3.2 Dezincification-resistant copper/zinc alloys
6 - 3.3 Test piece
6 - 3.4 Test sample-
6 - 3.5 Test specimen
6 - 3.6 Informative appendix
6 - 3.7 Normative appendix
6 - 4 GENERAL REQUIREMENTS
6 - 4.1 General
6 - 4.2 Acceptance requirements
7 - 4.3 Identification marking
8 - APPENDIX A - PURCHASING GUIDELINES
8 - A1 GENERAL
8 - A2 INFORMATION TO BE SUPPLIED BY THE PURCHASER
9 - APPENDIX B - LISTING OF EXAMPLES OF CATEGORY I ALLOYS
9 - B1 SCOPE
11 - APPENDIX C - TEST METHOD FOR THE ASSESSMENT OF THE SUSCEPTIBILITY TO DEZINCIFICATION OF COPPER ALLOYS CONTAINING ZINC
11 - C1 SCOPE
11 - C2 PRINCIPLE
11 - C3 REAGENTS
11 - C4 APPARATUS
12 - C5 PREPARATION OF TEST PIECES
12 - C5.1 General
12 - C5.2 Selection of test pieces
12 - C5.3 Mounting of test pieces
12 - C6 PROCEDURE
12 - C6.1 Exposure of the test pieces
13 - C6.2 Preparation of exposed test pieces for assessment of dezincification
13 - C6.3 Measurement of dezincification
14 - C7 TEST REPORT
15 - APPENDIX D - GENERAL INFORMATION ON FACTORS WHICH AFFECT THE RESISTANCE OF COPPER ALLOYS TO DEZINCIFICATION
15 - D1 GENERAL
15 - D2 NATURE OF DEZINCIFICATION
15 - D3 MEANS OF ACHIEVING DEZINCIFICATION RESISTANCE
15 - D3.1 General
15 - D3.2 Heat treatment of duplex copper alloys
16 - D4 THE EFFECT OF BRAZING ON DEZINCIFICATION RESISTANCE

Specifies test procedures for determining the resistance of copper-base alloys containing zinc to dezincification. Dezincification resistance is required for alloys used in contact with supply waters and soils. It also specifies acceptance criteria either in terms of acceptable chemical composition or ability to meet specified dezincification test requirements.

This Standard specifies procedures for determining the resistance of copper-base alloys containing zinc to the form of corrosion termed 'dezincification', in two steps as follows: (a) Alloys are categorized into two groups based on their chemical composition which is used to assess their susceptibility to dezincification.(b) Alloys assessed to be resistant to dezincification on the basis of chemical composition do not require testing. Alloys considered to be susceptible can be further evaluated by testing them under accelerated laboratory conditions after the completion of all manufacturing stages. Following this test and where the specified acceptance criteria are met, such alloys can also be regarded as resistant to dezincification.This Standard also specifies the acceptance criteria for the dezincification resistance of copper/zinc alloy components designed for use in contact with potable water or soils.NOTE: Advice and recommendations on information to be supplied by the purchaser at the time of enquiry or order are contained in Appendix A.

First published in part as AS 2345-1980.
MP 52 first published 1988.
Second edition 1990.
MP 52-1990 revised and redesignated in part as AS 3796(Int)-1990.
AS 2345-1980 and AS 3796(Int)-1990 revised and issued as AS 2345-1992.