Popular science fiction of the early 20th century depicted Venus as some kind of wonderland of pleasantly warm temperatures, forests, swamps and even dinosaurs. In 1950, the Hayden Planetarium at the American Natural History ...
Space Exploration
Oct 16, 2018
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In a world where annual economic losses from corrosion surpass 2.5 trillion US Dollars, the quest for corrosion-resistant alloys and protective coatings is unbroken. Artificial intelligence (AI) is playing an increasingly ...
Materials Science
Aug 11, 2023
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Like a hidden enemy, pitting corrosion attacks metal surfaces, making it difficult to detect and control. This type of corrosion, primarily caused by prolonged contact with seawater in nature, is especially problematic for ...
Analytical Chemistry
Mar 19, 2024
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In a multidisciplinary project, researchers at the Georgia Institute of Technology and Georgia Tech-Lorraine used terahertz imaging and signal processing techniques to look beneath the corroded surface of a 16th-century lead ...
Archaeology
Apr 25, 2022
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Nickel is one of the most abundant elements on earth. It is hard, yet malleable, magnetic at room temperature, and a relatively good conductor of electricity and heat. Most notably, nickel is highly corrosion resistant, which ...
Materials Science
Aug 6, 2019
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Do two promising structural materials corrode at very high temperatures when in contact with "liquid metal fuel breeders" in fusion reactors? Researchers of Tokyo Institute of Technology (Tokyo Tech), National Institutes ...
Plasma Physics
Mar 3, 2022
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(PhysOrg.com) -- Concrete accounts for about 5% of all human-related CO2 emissions. The fact that we use so much cement in building could mean that the issue becomes even more pronounced in the future. But what if there was ...
New research has established the "miracle material" called graphene as the world's thinnest known coating for protecting metals against corrosion. Their study on this potential new use of graphene appears in ACS Nano.
Nanomaterials
Feb 22, 2012
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People think of corrosion as rust on cars or oxidation that blackens silver, but it also harms critical electronics and connections in solar panels, lowering the amount of electricity produced.
Energy & Green Tech
Feb 2, 2017
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Glass, by definition, is amorphous; its atoms lack order and are arranged every which way. But when scientists squeezed tiny samples of a metallic glass under high pressure, they got a surprise: The atoms lined up in a regular ...
Condensed Matter
Jun 16, 2011
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Corrosion is the disintegration of an engineered material into its constituent atoms due to chemical reactions with its surroundings. In the most common use of the word, this means electrochemical oxidation of metals in reaction with an oxidant such as oxygen. Formation of an oxide of iron due to oxidation of the iron atoms in solid solution is a well-known example of electrochemical corrosion, commonly known as rusting. This type of damage typically produces oxide(s) and/or salt(s) of the original metal. Corrosion can also occur in materials other than metals, such as ceramics or polymers, although in this context, the term degradation is more common.
In other words, corrosion is the wearing away of metals due to a chemical reaction.
Many structural alloys corrode merely from exposure to moisture in the air, but the process can be strongly affected by exposure to certain substances (see below). 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. Because corrosion is a diffusion controlled process, it occurs on exposed surfaces. As a result, methods to reduce the activity of the exposed surface, such as passivation and chromate-conversion, can increase a material's corrosion resistance. However, some corrosion mechanisms are less visible and less predictable.
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