Marine Anodic Corrosion

What is galvanic corrosion?

• Galvanic corrosion is a term used to describe the process of metal becoming stronger and more resistant to corrosion over time.

• Galvanic corrosion is a process in which metal is protected from corrosion by a layer of paint or coating.

• Galvanic corrosion is a type of corrosion that occurs when metal is exposed to air and moisture.

• Galvanic corrosion is an electrochemical process in which one metal corrodes when it is in electrical contact with another metal in the presence of an electrolyte.

How do sacrificial anodes protect against corrosion?

• By sacrificing themselves through galvanic corrosion

• By attracting and neutralizing corrosive ions

• By releasing a protective coating on the metal surface

• By creating a barrier between the metal and the environment

What is cathodic protection?

• A technique to control corrosion

• A process to prevent rusting

• A technique to promote oxidation

• A method to accelerate corrosion

Tags

NGSS.HS-ETS1-3

What is the role of electrolyte conductivity in marine anodic corrosion?

• Electrolyte conductivity determines the rate of corrosion

• Electrolyte conductivity determines the color of the corrosion

• Higher electrolyte conductivity leads to slower corrosion

• Electrolyte conductivity has no effect on marine anodic corrosion

What are corrosion inhibitors and how do they work?

• Corrosion inhibitors are substances that only work on certain types of metals.

• Corrosion inhibitors are substances that have no effect on the corrosion of metals.

• Corrosion inhibitors are substances that prevent or reduce the corrosion of metals by forming a protective layer on the metal surface.

• Corrosion inhibitors are substances that accelerate the corrosion of metals by reacting with the metal surface.

Tags

NGSS.HS-ETS1-3

Which metal is commonly used as a sacrificial anode in marine applications?

• aluminum

• copper

• iron

• zinc

What is the purpose of a sacrificial anode?

• To make the metal structures stronger.

• To increase the rate of corrosion.

• To protect metal structures from corrosion.

• To attract more corrosion to the metal structures.

How does cathodic protection prevent corrosion?

• By using a sacrificial anode or impressed current to create a protective electrical current that counteracts the corrosion process.

• By using a chemical solution to dissolve the corrosion.

• By increasing the temperature of the metal surface.

• By applying a layer of paint to the metal surface.

Tags

NGSS.HS-ETS1-3

NGSS.HS-PS2-5

What factors affect the effectiveness of cathodic protection?

• Type and condition of the metal, environment, design and installation, maintenance and monitoring

• Design and installation only

• Environment only

• Type and condition of the metal only

How can electrolyte conductivity be increased in marine environments?

• Increasing the concentration of dissolved salts or ions in the water.

• Lowering the temperature of the water.

• Using distilled water instead of seawater.

• Decreasing the concentration of dissolved salts or ions in the water.