Prosthetic joints are usually fabricated from medical-grade metals, such as titanium and ceramics. However, despite major advances in replacement hip bones made from such materials, there always remains the issue of biocompatibility ...
Nov 10, 2022
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Titanium has many properties that make it a great choice for use in implants. Its low density, high stiffness, high biomechnanical strength-to-weight ratio, and corrosion resistance have led to its use in several types of ...
Oct 22, 2019
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A gas associated with the smell of rotten of eggs is now being proven to have widespread health benefits.
Sep 2, 2013
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(HealthDay)—Having grown up with gadgets galore, young parents aren't as worried about the potentially corrosive effects of too much screen time on their offspring, a new study suggests.
Jun 4, 2013
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House paint containing dangerous concentrations of lead is being sold in Cameroon by an American company – and the company is refusing to remove the paint from store shelves.
Mar 19, 2013
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More than 170 countries Monday adopted what World Health Organisation (WHO) chief Margaret Chan called a "game-changing" global pact to combat the illegal tobacco trade.
Nov 12, 2012
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For decades, overtightening has been blamed for the phenomenon that sometimes causes surgical screws and plates used in bone repair to irreversibly fuse together, a complication that can make subsequent removal difficult ...
Oct 23, 2012
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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.
This text uses material from Wikipedia, licensed under CC BY-SA
