Corrosion degrades the useful properties of materials and structures including strength, appearance and permeability to liquids and gases. Many structural alloys corrode merely from exposure to moisture in air, but the process can be strongly affected by exposure to certain substances. Corrosion can be concentrated locally to form a pit or crack, or it can extend across a wide area more or less uniformly corroding the surface.
foe. 1. a person who feels enmity, hatred, or malice toward another; enemy: a bitter foe. 2. a military enemy. 3. an opponent in a game or contest; adversary: a political foe. 4. a person who is opposed in feeling, principle, etc., to something: a foe to progress. 5. a thing that is harmful to or destructive of something.
Antagonist Definition. In literature, an antagonist is a character or a group of characters which stand in opposition to the protagonist or the main character.The term antagonist comes from Greek word â antagonistÄs â that means opponent, competitor or rival.onflict is a basic element of any plot. The presence of an antagonist alongside a protagonist is vital for the typical formula of a plot. The antagonist opposes the protagonist in his endeavors and thus the conflict ensues.