Corrosion in Cargo Spaces and Ballast Tanks

What is the primary cause of corrosion in ballast tanks?

• Excessive sunlight exposure

• Chemical cleaning

• Seawater contact with steel

• Poor air ventilation

Corrosion is a result of which type of reaction?

• Physical

• Nuclear

• Electrochemical

• Mechanical

Which part of a ship is most vulnerable to corrosion due to constant exposure to seawater?

• Bridge

• Ballast tanks

• Galley

• Accommodation ladder

Which condition does NOT typically promote corrosion in ballast tanks?

• Presence of oxygen

• Seawater

• High temperature

• Dry atmosphere

In cargo spaces, corrosion is often accelerated by:

• Refrigeration units

• Dry cargo residues

• Moisture from cargo and lack of coating maintenance

• Continuous washing

Microbiologically Influenced Corrosion (MIC) in ballast tanks is caused by:

• High voltage electrical fields

• Marine bacteria

• Cargo vibrations

• Ship noise

Which metal is most commonly corroded in marine environments?

• Gold

• Stainless steel

• Mild steel

• Aluminum

What role does pH level play in corrosion?

• Higher pH always prevents corrosion

• Extremely low or high pH can accelerate corrosion

• pH is unrelated to corrosion

• Corrosion only occurs at neutral pH

Which of the following is a visible sign of corrosion?

• Glossy surfaces

• White salt deposits

• Rust formation and pitting

• Clear liquid residue

Pitting corrosion is best described as:

• Widespread rusting

• Localized, deep holes in the metal

• Smooth surface staining

• Flaking of paint only