Which of the following are the three categories of corrosion?

The three categories of corrosion, as identified in marine environments, are electrochemical, galvanic, and electrolytic corrosion.

Electrochemical corrosion is a fundamental type that occurs due to electrochemical reactions. It involves the transfer of electrons between materials in the presence of an electrolyte, leading to the deterioration of metals.

Galvanic corrosion occurs when two dissimilar metals are in electrical contact in a corrosive environment, where the more active metal (anode) corrodes faster than it would alone, while the less active metal (cathode) is protected.

Electrolytic corrosion is related to the flow of electric current through an electrolyte, which can accelerate corrosion processes, especially where there are differences in conductivity or microenvironments created by electrical potentials.

Recognizing these distinctions is crucial for understanding how various environmental and material factors interact to cause corrosion is pivotal for effective prevention and management strategies in marine applications.