Round Steel Embedded Aluminum Alloy Sacrificial Anode
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- Add:武陟县大虹桥乡安张村中段立博, Zip:
- Contact: 裴迎春
- Tel:18625879268
- Email:941413095
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Pei Yingying 18625879 268
(2) Impressed Current Method Common power sources for the impressed current method include rectifiers, as well as solar cells, thermoelectric generators, wind turbines, etc. Commonly used materials for auxiliary anodes include high-silicon cast iron, graphite, magnetic iron oxide, and scrap steel. The impressed current method is currently the primary protection method for long-distance pipelines.
When selecting a cathodic protection method for a protected structure, the main factors to consider are:
(1) The size of the protection range: impressed current is superior for large ranges, while sacrificial anodes are economical for small ranges;
(2) Limitations of soil resistivity: sacrificial anodes are not suitable if the resistivity is too high;
(3) Nearby metal structures: interference sometimes restricts the use of impressed current;
(4) For surfaces with poor anti-corrosion coatings or exposed metal, sacrificial anodes are not suitable due to the large protection current required;
(5) Availability of power sources;
(6) Economic feasibility.
A comparison of various cathodic protection methods is shown in Table 6-3.
Table 6-3 Comparison of Cathodic Protection Methods
Method | Advantages | Disadvantages | |
Im p r e s s e d C u r r e n t M e t h o d | (1) Output current and voltage are continuously adjustable | (1) Requires an external power source | |
(2) Large protection range | (2) Causes interference to nearby metal structures | ||
(3) Not limited by soil resistivity | (3) High management and maintenance workload | ||
(4) More economical for larger projects | |||
(5) Long service life of protection devices | |||
S a c r i f i c i a l A n o d e M e t h o d | (1) No external power source required | (1) Uneconomical in high-resistivity environments | |
(2) No or minimal interference to nearby metal structures | (2) Not suitable for poor anti-corrosion coatings | ||
(3) Low management workload | (3) Limited output current | ||
(4) Economical for small projects | |||
(5) Uniform protection current with automatic adjustment and high utilization | |||
D r a i n a g e P r o t e c t i o n | P o l a r i t y D r a i n a g e | (1) Utilizes stray current to protect pipelines | (1) Causes interference to other structures |
(2) Economical and practical | (2) Pipeline is unprotected when electric rail is out of operation | ||
(3) Simple and easy method with low management requirements | (3) Difficult to control negative potential | ||
(4) No concerns about stray current drainage | |||
F o r c e d D r a i n a g e | (1) Wide protection range | (1) Causes interference to other structures | |
(2) Voltage and current are continuously adjustable | (2) Requires an external power source | ||
(3) Uses rails as anodes, simple structure | (3) Drainage points prone to overprotection | ||
(4) Pipeline remains protected when electric rail is out of operation | |||
(5) No anode interference | |||
Pei Yingying 1862587 9268
| Industry Category | Minerals-Metallurgy |
|---|---|
| Product Category | |
| Brand: | 立博防腐 |
| Spec: | 800*140*50mm |
| Stock: | 1111 |
| Manufacturer: | |
| Origin: | China / Henan / Jiaozuoshi |
