7. 7) Development of the safety problem of maintenance species in cathodic protection system

6. 6) Aging inspection of pipeline anticorrosion coating

5. 5) Measurement of near-spacing potential along the pipeline

4. 4) Analysis of common faults of cathodic protection system

3. 3) Sacrificial anode maintenance

2. 2) Routine maintenance of cathodic protection station

1. 1) Preparation and acceptance before the cathode protection is put into operation

8. Operation and maintenance of cathodic protection system

7. Current state of the cathodic protection market

6. Principle of cathodic protection

12. 12) What are the main sacrificial anodes?

11. 11) What are the components of a sacrificial anode cathodic protection system?

10. 10) What is the function of the test pile?

9. 9) Why is electrical insulation needed?

8. 8) What controls the reference electrode?

7. 7) What are the types of auxiliary anodes?

6. 6) What is the role of the auxiliary anode?

5. 5) What are the main types of power supply?

4. 4) What is the function of power supply?

3. 3) What are the components of a forced current cathodic protection system?

2. 2) What is a sacrificial anode cathodic protection system?

1. 1) What is a forced current cathodic protection system?

5. Question and answer on cathodic protection technology

4. 4) Criteria for cathodic protection of dissimilar metals:

3. 3) Copper alloy cathodic protection criteria:

2. 2) Criteria for cathodic protection of aluminum alloys:

1. 1) Cathodic protection criteria for ordinary steel

4. Criterion of cathodic protection effect

2. 2) Forced current cathodic protection technology

1. 1) Sacrifice anode cathodic protection technology

directory

Cathodic protection technology is a kind of electrochemical protection technology. Its principle is to apply an impressed current to the surface of the corroded metal structure, and the protected structure becomes the cathode, so that the electron migration of metal erosion can be inhibited and the occurrence of erosion can be avoided or weakened.

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The metals are electrically connected and rely on the current generated by the continuous erosion of the negative metal to protect the other metals. Advantages: A: Low one-time investment cost, and basically no maintenance cost need to be paid in the operation process B: High utilization rate of protection current, no overprotection will occur C: No interference effect on adjacent underground metal measures, suitable for the protection of plant area and long distance pipelines without power supply, as well as small-scale dispersed pipelines D: E: Simple construction technology, usually do not need special professional maintenance management. Disadvantages: A: low driving potential, narrow protection current regulation range, small protection range B: The use range is limited by the soil resistivity, that is, the soil resistivity is greater than 50 ω /m, it is generally not suitable to use the sacrifice anode protection C: In the presence of strong spurt current interference area, especially by AC interference, anode function may reverse D: The effective life of cathodic protection is limited by the life of the sacrificial anode and should be replaced on schedule

Cathodic protection material