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
'der Rost' and 'die Korrosion' both have to do with the destruction of metal through chemical reactions. 'Rost' is the visible reddish-brown layer on iron or steel. The word is very natural in everyday language, for example when talking about an old bicycle or car. 'Korrosion' is the more general and more technical term for the whole process in which a material is slowly attacked. Corrosion can also affect other metals or materials. Learners may confuse the words because rust is a well-known example of corrosion. In everyday language, people usually say 'Rost'; in technology, construction, or science, 'Korrosion' fits better.
Durch Salz und Feuchtigkeit wurde die Korrosion an der Brücke schneller.
Salt and moisture made the corrosion on the bridge progress faster.
Am alten Fahrrad ist viel Rost an der Kette zu sehen.
There is a lot of rust visible on the chain of the old bicycle.