Cathodic Protection 2

What is impressed current cathodic protection?

• A method used to protect metal structures from corrosion by applying a coat of paint to the structure.

• A method used to protect metal structures from corrosion by applying an external electrical current to the structure.

• A method used to protect metal structures from corrosion by applying a layer of rubber to the structure.

• A method used to protect metal structures from corrosion by heating the structure to high temperatures.

How do sacrificial anodes provide cathodic protection?

• Sacrificial anodes provide cathodic protection by attracting more corrosion to the structure.

• Sacrificial anodes provide cathodic protection by creating a barrier that prevents corrosion.

• Sacrificial anodes provide cathodic protection by corroding themselves instead of the structure they are protecting.

• Sacrificial anodes provide cathodic protection by releasing harmful chemicals that stop corrosion.

What are the key parameters to monitor in cathodic protection systems?

• Color, size, and weight

• Temperature, humidity, and pressure

• Voltage, resistance, and capacitance

• Potential, current output, and anode condition

What are the key considerations in designing a cathodic protection system?

• Selecting the most expensive type of cathodic protection

• Understanding the environment and potential corrosion threats, selecting the appropriate type of cathodic protection, determining the proper placement and number of anodes, ensuring proper electrical isolation, and regular monitoring and maintenance.

• Ignoring potential corrosion threats

• Using non-conductive materials for anode placement

What are the common maintenance practices for cathodic protection systems?

• Replacing anodes every 5 years

• Using non-conductive coatings on pipelines

• Ignoring electrical current readings

• Regular inspection of anodes, monitoring of electrical currents, testing for coating integrity, and periodic maintenance of rectifiers.

What are the relevant standards for cathodic protection?

• NACE International standards such as SP0169, SP0285, and SP21400, as well as ASTM International standards such as ASTM G8, G42, and G193.

• ISO standards such as ISO 12944 and ISO 15589

• API standards such as API 651 and API 652

• ASME standards such as ASME B31.4 and ASME B31.8

How does impressed current cathodic protection differ from sacrificial anode cathodic protection?

• Impressed current cathodic protection uses an external power source, while sacrificial anode cathodic protection uses a more reactive metal.

• Impressed current cathodic protection is less effective than sacrificial anode cathodic protection

• Sacrificial anode cathodic protection requires an external power source

• Impressed current cathodic protection uses sacrificial anodes

What are the potential risks of inadequate cathodic protection monitoring?

• Decreased energy consumption

• Improved structural integrity

• Reduced maintenance costs

• The potential risks of inadequate cathodic protection monitoring include corrosion of metal structures, structural damage, safety hazards, and costly repairs.

What are the factors to consider in the selection of cathodic protection materials?

• Type of structure, environment, potential difference, and expected service life

• Weight of the material

• Color of the material

• Cost of the material

How can cathodic protection systems be optimized for long-term effectiveness?

• Using low-quality materials

• Improper design and installation

• Regular monitoring and maintenance, proper design and installation, and use of high-quality materials

• Neglecting monitoring and maintenance