Regulations on cathodic protection of underwater structures
TIME£º2020-8-21 8:37:12
Due to the frequent changes of underwater conditions such as salinity, flow rate and temperature, in order to maintain the normal cathodic protection, it is necessary to adjust the corresponding cathodic protection system, determine the performance changes of the cathodic protection system, and conduct regular testing and inspection.
Wind and wave also have some influence on the cathodic protection of underwater structures. Generally speaking, more comprehensive tests and reviews are carried out after a major storm.
Before the cathodic protection system is put into operation, a comprehensive potential test is required, which is the material for future management testing. After startup, monitor whether the system meets the applicable standards and operation reliability, and confirm that the underwater metal structure has been protected.
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.
Management trials are conducted at least once a year to ensure that all locations of underwater structures are within the protected area. The cathodic protection power supply shall be checked every two months. Common detection items include current, voltage output, power loss and ideal protection potential of structure / water.
The forced current cathodic protection equipment should be maintained once a year to reduce the failure in operation and maintenance items. All tools and instruments used for electrical test shall be kept in good working condition. Every year, the instrument team should be organized to check the pollution degree of reference electrode, the reliability of electrical connection, and the damage of conductor insulation skin, so as to prevent the introduction of inappropriate test error in the test. If necessary, temporary divers should be employed to assist other underwater inspections to ensure the effectiveness of the cathodic protection system. Underwater inspection items include: underwater observation (or photography) corrosion, potential of key components, cathodic corrosion degree and mechanical reliability.
For the problems found in regular measurement and inspection, remedial measures should be taken in time, mainly including:
1. Repair, replace or adjust the components of cathodic protection system;
2. Add anode properly to protect cathode;
3. Repair insulation and electrical continuity connector.
