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Definition: corrosion from Dictionary of Energy

Materials. the degradation of metals or alloys due to chemical reactions with their environment, accelerated by the presence of acids or bases; for example, the rusting of metal surfaces exposed to moist air or to impure water. Thus, corrosive.


corrosion

From The Columbia Encyclopedia
atmospheric oxidation of metals (see oxidation and reduction ). By far the most important form of corrosion is the rusting of iron . Rusting is essentially a process of oxidation in which iron combines with water and oxygen to form rust, the reddish-brown crust that forms on the surface of the iron. Rust, a chemical compound, is a hydrated ferric oxide Fe 2 O 3 · n H 2 O, where n is usually 1 1/2. The chemical mechanism of rusting is not fully known, but is thought to involve oxidation of metallic iron to ferrous ion (Fe ++ ) and reaction of the ferrous ion with oxygen and water to form rust. The reaction is catalyzed by water, acids, and metals (e.g., copper and tin) below iron in the electromotive series . Because iron is so widely used, e.g., in building construction and in tools, its protection against rusting is important. Although metals (e.g., aluminum, chromium, and zinc) above iron in the electromotive series corrode more readily than iron, their oxides form a tenuous coating…
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Full text Article corrosion

From Hawley's Condensed Chemical Dictionary
(1) The electrochemical degradation of metals or alloys caused by reaction with their environment, which is accelerated by the presence of acids or bases. In general, the corrodability of a metal or alloy depends on its position in the activity series. Corrosion products often take the form of…
| 197 words
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Full text Article corrosion

From The Columbia Encyclopedia
atmospheric oxidation of metals (see oxidation and reduction ). By far the most important form of corrosion is the rusting of iron . Rusting is essentially a process of oxidation in which iron combines with water and oxygen to form rust, the reddish-brown crust that forms on the surface of the iron. …
| 383 words
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Full text Article Corrosion, Microbial

From Encyclopedia of Microbiology
A scanning electron micrograph showing a...
000 Abstract Corrosion of metals is a natural phenomenon involving the generation and consumption of electrons and, microorganisms actively participate in the corrosion process through the utilization and release of electrons. Anaerobic sulfate-reducing bacteria (SRBs) are known to be especially…
| 8,128 words , 4 images

Full text Article corrosion

From The Hutchinson Unabridged Encyclopedia with Atlas and Weather Guide
Eating away and eventual destruction of metals and alloys by chemical attack. The rusting of ordinary iron and steel is the most common form of corrosion. Rusting takes place in moist air, when the iron combines with oxygen and water to form a brown-orange deposit of rust (hydrated iron oxide). The…
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Nomograph for calculation of...
Section reviewed by John Farraro The corrosion problems and mitigation techniques related to oil and gas production operations are discussed here. The production environments that were discussed in the Chapter on “Drilling and Well Completion Corrosion” are still pertinent to corrosion in production…
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Full text Article Corrosion and its Prevention

From The Hutchinson Unabridged Encyclopedia with Atlas and Weather Guide
Introduction The corrosion of metals takes place all around us. Corrosion is usually the reaction of metals with oxygen and/or water to form an oxidation product. In fact most of the metals we take for granted in our everyday life have probably been obtained from their oxidation product – usually by…
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Electrochemical corrosion of metals.
Section reviewed by John Farraro Corrosion is a naturally occurring phenomenon where materials interact with the environment resulting in chemical change. This chemical change is a degradation in structure with a few exceptions such as batteries. When this corrosion reaction with metal continues…
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Full text Article corrosion

From Britannica Concise Encyclopedia
| 86 words
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Full text Article corrosion

From The American Heritage(R) Dictionary of the English Language
| 60 words
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Full text Article corrosion

From The Macquarie Dictionary
| 33 words
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