AS 2239-1993

1 - AS 2239-1993 GALVANIC (SACRIFICIAL) ANODES FOR CATHODIC PROTECTION
4 - PREFACE
5 - CONTENTS
6 - SECTION 1 SCOPE AND GENERAL
6 - 1.1 SCOPE
6 - 1.2 REFERENCED DOCUMENTS
6 - 1.3 DEFINITIONS
6 - 1.3.1 Anode backfill
6 - 1.3.2 Anode consumption rate
6 - 1.3.3 Anode core
6 - 1.3.4 Cathodic protection
6 - 1.3.5 Closed circuit potential
6 - 1.3.6 Current capacity
6 - 1.3.7 Current density
6 - 1.3.8 Driving potential
6 - 1.3.9 Galvanic action
6 - 1.3.10 Galvanic anode
6 - 1.3.11 Gross anode mass
6 - 1.3.12 Net anode mass
6 - 1.3.13 Open circuit potential
6 - 1.3.14 Packaged anode
6 - 1.3.15 Reference electrode
6 - 1.3.16 Resistivity
7 - 1.3.17 Test anode
7 - 1.3.18 Test sample
7 - 1.3.19 Test specimen
7 - 1.4 DESIGNATION
7 - 1.4.1 Anodes
7 - 1.4.2 Backfill
7 - 1.5 FREEDOM FROM DEFECTS
7 - 1.6 THICKNESS OF CORE COVER
7 - 1.7 MARKING
7 - 1.8 ROUNDING OF TEST RESULT VALUES
8 - SECTION 2 ANODE AND CORE REQUIREMENTS
8 - 2.1 SCOPE OF SECTION
8 - 2.2 ANODES
8 - 2.2.1 Anode composition
8 - 2.2.2 Anode mass and dimensions
8 - 2.3 CORES
8 - 2.3.1 Placement of anode core
8 - 2.3.2 Finish
8 - 2.3.3 Methods of attachment of cable for buried anodes
9 - 2.3.4 Colour of cable insulation
11 - SECTION 3 PERFORMANCE REQUIREMENTS
11 - 3.1 SCOPE OF SECTION
11 - 3.2 MECHANICAL TEST
11 - 3.3 ELECTRICAL RESISTANCE
11 - 3.4 CONSUMPTION RATE OF ALUMINIUM ANODES IN SEAWATER
11 - 3.5 CLOSED CIRCUIT POTENTIAL OF ALUMINIUM ANODES IN SEAWATER
12 - SECTION 4 BACKFILL FOR BURIED MAGNESIUM AND ZINC GALVANIC ANODES
12 - 4.1 GENERAL
12 - 4.2 BACKFILL COMPOSITION
12 - 4.3 PROPERTIES AND APPLICATION
13 - 4.4 ANODE PACKAGING
14 - APPENDIX A - PURCHASING GUIDELINES
14 - A1 GENERAL
14 - A2 INFORMATION TO BE SUPPLIED BY THE PURCHASER
15 - APPENDIX B - GUIDANCE ON THE APPLICATION OF ANODES
15 - B1 SCOPE
15 - B2 SELECTION OF ANODES
15 - B3 CHARACTERISTICS AND USES OF ANODE TYPES
15 - B3.1 Magnesium anodes
15 - B3.2 Zinc anodes
15 - B3.3 Aluminium anodes
15 - B4 TYPICAL ANODES
15 - B4.1 Magnesium anodes
16 - B4.2 Zinc anodes
16 - B4.3 Aluminium anodes
21 - APPENDIX C - METHOD FOR THE DETERMINATION OF THE ANODE-TO-CORE RESISTANCE OF GALVANIC ANODES
21 - C1 GENERAL
21 - C2 PRINCIPLE
21 - C3 APPARATUS
21 - C4 CIRCUIT
21 - C5 PROCEDURE
21 - C6 REPORT
23 - APPENDIX D - METHOD FOR THE DETERMINATION OF THE CONSUMPTION RATE OF ALUMINIUM ANODE ALLOYS IMMERSED IN SEAWATER
23 - D1 GENERAL
23 - D2 PRINCIPLE
23 - D3 APPARATUS
23 - D4 CIRCUIT
23 - D5 PREPARATION OF TEST ANODES
23 - D6 PROCEDURE
24 - D7 REPORT
25 - APPENDIX E - METHOD FOR THE DETERMINATION OF THE CLOSED-CIRCUIT POTENTIAL OF ALUMINIUM ANODES IMMERSED IN SEAWATER
25 - E1 GENERAL
25 - E2 PRINCIPLE
25 - E3 APPARATUS
25 - E4 CIRCUIT
25 - E5 PREPARATION OF TEST ANODE
25 - E6 PROCEDURE
25 - E7 REPORT

Specifies requirements for chemical composition of zinc, magnesium and aluminium alloys and gives details of design features for some standardized shapes. It includes performance requirements and test methods for anodes and gives details and properties of types of backfill for buried anodes.

This Standard specifies requirements for galvanic (sacrificial) anodes for use in the cathodic protection of metals against corrosion. It specifies the composition of suitable alloys for magnesium, zinc and aluminium anodes and gives details of shapes and design features of some commonly used anodes. It also includes details of backfill compositions and properties, for buried magnesium and zinc anodes.NOTE: Advice and recommendations on information to be supplied by the purchaser at the time of enquiry or order are contained in the purchasing guidelines set out in Appendix A.

First published as AS 2239-1979.
Second edition 1993.