Standard
Track updates
AS 2832.4-2006
[Current]Cathodic protection of metals, Part 4: Internal surfaces
Specifies requirements for the cathodic protection of internal surfaces of pipes and structures including but not limited to heat exchanges, hot water systems, clarifiers, ballast and water storage tanks, cooling conduits and process plants.
Published: 23/10/2006
Pages: 54
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
Foreword
1 Scope and general
1.1 Scope
1.2 Referenced documents
1.3 Definitions
1.4 Competence of personnel
2 Criteria for cathodic protection
2.1 General
2.2 Potential criteria for ferrous vessels
2.3 Potential criteria for mixed metallic structures
2.4 Potential criteria for aluminium structures
2.5 Potential criteria for titanium
2.6 Overprotection
2.6.1 Ferrous structures
2.6.2 Aluminium structures
3 Measurement and equipment
3.1 General
3.2 Potential measurement and equipment
3.2.1 General
3.2.2 Position of monitoring electrodes
4 Design of structures for cathodic protection
4.1 General
4.2 Structure coating
4.3 Interference with foreign structures
4.4 Isolation of structures in contact with the internal electrolyte
4.5 Electrical continuity
4.6 Fittings to support anodes and monitoring equipment
4.7 Venting
5 Design of cathodic protection systems
5.1 General
5.2 Safety precautions
5.2.1 Personal electrical safety
5.2.2 Aquatic electrical safety
5.3 Design requirements
5.4 Design data
5.4.1 General
5.4.2 Structure layout
5.4.3 Cathodic protection current requirements
5.5 Cables
5.5.1 General
5.5.2 Types of cables
5.5.3 Test cables
5.5.3.1 Specification
5.5.3.2 Insulation colours
5.5.4 Impressed current anode cables
5.5.4.1 Specification
5.5.4.2 Cable identification
5.5.5 Galvanic anode cables
5.6 System design documentation
6 Installation of cathodic protection systems
6.1 General
6.2 Materials and equipment acceptance tests
6.2.1 General
6.2.2 Anodes
6.2.3 Cables
6.2.4 Transformer/rectifier equipment
6.3 Installation of galvanic anode systems
6.4 Installation of impressed current systems
6.4.1 Anodes and cabling
6.4.2 Transformer/rectifier
6.5 Reference electrodes
6.6 System design documentation
7 Commissioning of cathodic protection systems
7.1 Scope and general
7.1.1 Scope
7.1.2 General
7.2 Pre-energization testing
7.3 System operation and adjustment
7.4 Post energization tests
7.5 Records
7.6 Commissioning report
7.7 Operation manuals
8 Operation and maintenance of cathodic protection systems
8.1 General
8.2 Measuring techniques
8.3 Cathodic protection potential surveys
8.4 Equipment maintenance checks
8.4.1 Impressed current systems
8.4.2 Galvanic anode installations
8.5 Structure inspections
8.6 Records
Appendix A
A1 Scope
A2 General components of cathodic protection installations
A3 Factors affecting the corrosion of metallic structures
Appendix B
B1 General
B2 Measurement of polarization potential
Appendix C
C1 General
C2 Stabilized zinc reference cells
Appendix D
D1 General
D2 Choice of system—Impressed current or galvanic anodes
D3 Design data
D4 Determination of cathodic protection current requirements
D4.1 Outline of design procedure
D4.2 Determination of immersed surface area
D4.3 Prediction of current requirement
D4.4 Calculation of current capacity
D4.5 Anode layout design
D4.6 Determination of resistance of the anode or anode array to the electrolyte
D4.7 Determination of anode output current
D4.8 Galvanic anode mass requirement
D4.9 Anode Arrangements
D4.9.1 General
D4.9.2 Calculation of appropriate anode to structure separation
D4.9.3 Installation
D4.9.3.1 Installation of galvanic anodes
D4.9.3.2 Installation of impressed current anodes
D4.10 Anode materials, application and operating characteristics
D4.11 Power supply considerations
D4.11.1 Sources of direct current
D4.11.2 Equipment
D4.11.3 Calculation of voltage requirements
Appendix E
E1 General
E2 Coating properties
E2.1 General
E2.2 Application and curing properties
E2.3 Chemical properties
E2.4 Physical properties
E3 Coating choice
Appendix F
Appendix G
Appendix H
Appendix I
Appendix J
Appendix K
K1 Scope and general
K1.1 Scope
K1.2 General
K2 Calibration
K3 Maintenance
Cited references in this standard