corrosion
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corrosion
The gradual destruction of a material, especially metal, through a chemical or electrochemical reaction with its environment. The best-known example of corrosion is the rusting of iron.
Die Korrosion hatte die alte Eisenbrücke so stark geschwächt, dass sie gesperrt werden musste.
The corrosion had weakened the old iron bridge so badly that it had to be closed.
'Die Korrosion' (corrosion) is the noun that describes the process expressed by the verb 'korrodieren' (to corrode). The ending '-ion' is typical of nouns that refer to a process or a result.
Salzwasser lässt Metall besonders schnell korrodieren.
Salt water makes metal corrode especially quickly.
'Korrosion' (corrosion) is the general scientific and technical term. The best-known example of corrosion is the rusting of iron, for which the word 'Rost' (rust) is usually used in everyday language.
Ingenieure entwickeln neue Legierungen mit hohem Schutz gegen Korrosion.
Engineers are developing new alloys with strong protection against corrosion.
Common formulations are 'Schutz vor Korrosion' (protection against corrosion), 'Korrosion verhindern' (to prevent corrosion), or 'Korrosion an Metallen' (corrosion on metals). The preposition 'durch' (through/by) is often used to indicate the cause, for example 'Korrosion durch Feuchtigkeit' (corrosion caused by moisture).
Das neue Auto hat einen speziellen Schutz vor Korrosion.
The new car has special protection against corrosion.
rust / grate
Rost and Korrosion refer to visible or progressing damage to metal. Rost is the reddish-brown layer that forms especially on iron or steel; Korrosion is the broader term for the destruction of a material by its surroundings. When talking about iron, usually use Rost; otherwise, Korrosion may be appropriate.
An den Metallteilen der Brücke setzte durch die feuchte Luft Korrosion ein.
The damp air caused corrosion to begin on the bridge's metal components.
An der eisernen Brücke bildete sich nach dem feuchten Winter roter Rost.
Red rust formed on the iron bridge after the wet winter.
