1 Scope
This standard specifies the design criteria, design method, installation method, protective result inspection and replacement principle of sacrificial anode cathodic protection (hereinafter referred to as sacrificial anode protection) for steel engineering structures in harbour.
This standard is applicable to the design, installation and application of the sacrificial anode protection of such parts as wharf piling bar, cross-sea bridge piling bar, steel artificial island, steel pontoon, water drum, protection door of cave depot, dock gate and slide that immerge in seawater and sea mud.
2 Normative References
The following normative documents contain provisions which, through reference in this standard, constitute provisions of this standard. For dated reference, subsequent amendments (excluding corrections) to, or revisions of, any of these publications do not apply. However, all parties coming to an agreement according to this standard are encouraged to study whether the latest edition of these documents is applicable. For undated references, the latest editions of the normative documents apply.
GB/T 4948 Sacrificial Anode of Al-Zn-In Series Alloy
GB/T 4950 Sacrificial Anode of Zn-Al-Cd Alloy
GB/T 7387 Technical Requirements for Marine Reference Electrode
GB/T 12466 Terminology for Corrosion and Protection for Ship and Marine Engineering
Contents
Foreword I
1 Scope
2 Normative References
3 Terms and Definitions
4 Design Criteria
5 Design Method
6 Installation Method of Sacrificial Anode
7 Inspection of Protective Result
8 Replacement Principle
Appendix A (Normative) Calculation Method of Anode Resistance and Occurrence Magnitude of Current
Appendix B (Informative) Welding Fixation Method
Appendix C (Informative) Bolt Fixation Method
