| Learning / English Dictionary |
CORROSION
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
Erosion by chemical action
Synonyms:
Classified under:
Nouns denoting natural processes
Hypernyms ("corrosion" is a kind of...):
chemical action; chemical change; chemical process ((chemistry) any process determined by the atomic and molecular composition and structure of the substances involved)
Hyponyms (each of the following is a kind of "corrosion"):
indentation; pitting; roughness (the formation of small pits in a surface as a consequence of corrosion)
rust; rusting (the formation of reddish-brown ferric oxides on iron by low-temperature oxidation in the presence of water)
Derivation:
corrode (become destroyed by water, air, or a corrosive such as an acid)
corrode (cause to deteriorate due to the action of water, air, or an acid)
Sense 2
Meaning:
A state of deterioration in metals caused by oxidation or chemical action
Classified under:
Nouns denoting stable states of affairs
Hypernyms ("corrosion" is a kind of...):
deterioration; impairment (a symptom of reduced quality or strength)
Derivation:
corrode (become destroyed by water, air, or a corrosive such as an acid)
Context examples:
“The present work focused on corrosion inhibition on commercial steel in a marine environment and its application in coatings,” Gopalan says.
(Mango leaf extract can stop ships from rusting, SciDev.Net)
“The anti-corrosion property was owing to the creation of iron-polyphenol, an organometallic compound.”
(Mango leaf extract can stop ships from rusting, SciDev.Net)
He explains that ethanol was used to extract phytochemicals from dried mango leaves and various concentrations tested for maximum corrosion resistance.
(Mango leaf extract can stop ships from rusting, SciDev.Net)
Gopalan tells that the compound, made by using epoxy as a base and incorporating mango leaf extracts in a substrate of amorphous silica, achieved 99 per cent inhibition of corrosion in commercial steel when immersed in a saline medium to mimic seawater.
(Mango leaf extract can stop ships from rusting, SciDev.Net)
A number of synthetic corrosion inhibitors is available but most have the drawback that they are expensive, harmful to the environment and to human health which is why the focus on plant-based alternatives, he says.
(Mango leaf extract can stop ships from rusting, SciDev.Net)
According to Nishanth K. Gopalan, leader of the team from the National Institute for Interdisciplinary Science and Technology, Thiruvananthapuram, mango leaves were selected for their anti-oxidant properties and their abundant content of polyphenols, which are known to resist corrosion.
(Mango leaf extract can stop ships from rusting, SciDev.Net)
Gosvami tells that much more work needs to be done to prove that the new method is superior to widely accepted methods of imparting corrosion resistance to steel such as galvanising with zinc or coating with conventionally used epoxy-based paints.
(Mango leaf extract can stop ships from rusting, SciDev.Net)
