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In the design of impressed current cathodic protection, for the process design of buried pipeline, according to the process calculation, it needs to increase 10% margin within the protection range, and generally reserve 10% allowance for pipeline protection length. The design of impressed current cathodic protection is generally based on the actual situation of new structure or existing structure. In parameter selection and design calculation, as long as it is consistent with the parameters of the pipeline itself, the design is often successful.
In the design of impressed current cathodic protection, the design life of auxiliary anode should match the protection structure, and the replaceability of auxiliary anode with different structure should be considered. For impressed current cathodic protection of buried pipelines, the design life of auxiliary anode is generally not less than 20 years.
The service life of auxiliary anode is the key to ensure the effective operation of impressed current cathodic protection system. The failure of the auxiliary anode will interrupt the cathodic protection system. For the replaceable auxiliary anode system, there is no need to choose the expensive and long life anode economically.
In the design of impressed current cathodic protection, attention should be paid to the mutual interference between the protection system and the external metal structure, as well as the interference of external electrical signals on the protection system. There are other metal structures around the protected metal structure. For buried pipelines, cathodic protection system is composed of a complete current loop through the ground. In impressed current cathodic protection, the ratio of maximum output voltage to maximum output current should be greater than the total resistance of cathodic protection circuit.
In order to form a complete anode current and distribute current from the anode to the ground, it is necessary to form a current distribution circuit from the anode to the anode. Auxiliary anode is an important part of impressed current cathodic protection, which is an engineering structural unit to ensure the effectiveness of cathodic protection. However, due to the high battery pressure, part of the current discharged from the anode ground bed is affected by stray current.
Shandong Linyi Bosi conductive materials Co., Ltd. is a high-tech enterprise specializing in the production of MMO flexible anode, conductive polymer flexible anode and titanium coated anode, mainly providing cathodic protection technology, engineering design, installation and technical services.