|
|
|
Nasa's Vomit Comet
September 29, 2005
The Vomit Comet is the nickname for Nasa's C-9 airplane used to simulate weightlessness for astronaut training. The C-9 replaced two KC-135's previously used for this function. The Vomit Comet engages in a flight lasting almost...
Start here...first principles (A)
Start here…first principles (A) Terry Dashner……..Faith Fellowship Church PO Box 1586 Broken Arrow, OK 74013 Mortimer J. Adler said, “The fundamentals of logic should be as transcultural as the mathematics with which the principles of logic are...
The FR ( Flawed Reason ) Theory
FR ( Flawed Reason ) theory is a theory that reason itself is ultimately flawed. That is, at some point Reason breaks down. It is not just a matter of human reason but Reason itself. FR theory, at least at this stage, does not say that it is...
The Joan of Arc Complex
Sometimes I think that I have a mental health problem and that at any minute the pharmaceutical companies are going to develop a cute little green star-shaped pill to cure me of my ailment. I call it my Joan of Arc Complex. You see, I hear voices...
Who Are the Key Players in Astrology?
Astrology has evolved over the many centuries of its existence from a fatalistic, even superstitious ritual meant for “kings” and “rulers” to a viable “art form” incorporating changes through the centuries in the development of our understanding...
|
|
| |
|
|
|
|
|
|
Commotion with Corrosion
This is not another boring science topic that will put you off
to sleep. Trust me, I'll make this as simple and as interesting
read as possible.
Corrosion's dictionary meaning is synonymous to a list of words
like rusting, corroding, erosion, a chemical process, a chemical
change, a chemical action a natural activity, deterioration of
metals through the process of oxidation or chemical action.
Whew!
To explain it further, corrosion is defined as the wearing away
of materials in a slow blow by blow process. It does not
literally pertain to the destruction of metals and other related
materials.
Corrosion is then followed by reversion to a more subtle and
balanced pairs or combination where metals are known as the most
popular examples. Corrosion, in short, is the opposite of
metallurgy.
Because while metallurgy is the molding and making of metals,
corrosion on the other hand, is the rusting, corroding and
unmaking of metals caused by a chemical reaction between the
metal and its external faculties which makes up its environment.
Corrosion, in its broadest studies are subdivided into a number
of categories with each type processing a different
characteristic from the other.
But for a more comprehensive study and understanding of
corrosion, scientist have specifically classified corrosion into
2 general and most known types and methods in which the process
of unmaking the metals can take place.
The first of which is "typified corrosion" whereby metal iron is
exposed to its external agencies during which the temperature is
high or eleveated. During typified corrosion, the corroding and
rusting of the metal begins as soon as the oxygen in the
atmosphere to produce 'mill scale', a common product formed
whenever oxygen reacts with its surroundings.
Mill scale and magnetite, which plays a vital role in the method
of typified corrosion, contains the same chemical composition
called iron ores.
Other forms of metals behave in the same way when associated to
its external environment, they also produce varieties of oxides
and may have the tendency to behave in the similar manner to
come up with other compounds.
All of these chemical reaction
and activity points to summarize
that the result of direct combination between the given reacting
elements results to products of corrosion, and does not plainly
embody the end product formed through the substitution of or
displacement of an element for or by another element.
However, the second type and method of corrosion is referred to
as "galvanic" corrosion or "electrochemical corrosion".
This method is characterized by the process of displacement of
one given element in one phase (usually in the form of alloy or
metal). And since electric current is the focal point of the
variable displacement of one given element by the other given
element, literally defining the very meaning of galvanic or
electrochemical corrosion.
Furthermore, electrochemical corrosion generally refers to cases
of corrosion in which metal or alloy being rusted is
continuously associated and linked with the corrosion-causing
solution, or another given element that is a dissimilar metal or
may also be some different conducting or solid material.
The term electrochemical corrosion may also be used in cases
when either pure metal, impure metals, or other forms of metal
or alloys are exposed to pure water, aqueous solution of water
soluble materials, or different mixtures of water with other
elements which is both not soluble nor a solvent of water.
Corrosion will not take place in the absence of corrosion cells.
In a more simplified situation, it's like a cheeseburger without
cheese. Before such corrosion cells do their function, some
pre-requisites must be met.
First requirement is for cells to have doors to connect two
points, the metal and the solution, to allow the flow of
electric current to and from each other in the metal surface.
Second, the cell must be capable of electric conductivity. And
lastly, there must be a motivating force or 'push' that will
enable the initiation (first step), and maintenance (second
step) of flow of current all throughout the system.
About the author:
James Monahan is the owner and Senior Editor of CorrosionStop.com and
writes expert articles about corrosion
|
|
|
|
|
| Science/AAAS | Scientific research, news and career information |
| International weekly science journal, published by the American Association for the Advancement of Science (AAAS). |
| www.sciencemag.org |
|
| Science/AAAS | Table of Contents: 1 December 2006; 314 (5804) |
| This Week in Science: Editor summaries of this week's papers. Science 1 December 2006: 1349. ... 2006 American Association for the Advancement of Science. ... |
| www.sciencemag.org |
|
| Science.gov : FirstGov for Science - Government Science Portal |
| Science.gov is a gateway to government science information provided by US Government science agencies, including research and development results. |
| www.science.gov |
|
| ScienceDaily: Your source for the latest research news and science ... |
| ScienceDaily -- the Internet's premier online science magazine and science news web site -- brings you the latest discoveries in science, health & medicine, ... |
| www.sciencedaily.com |
|
| Science News - New York Times |
| Find breaking news, science news & multimedia on biology, space, the environment, health, NASA, weather, drugs, heart disease, cancer, AIDS, mental health ... |
| www.nytimes.com |
|
| Science News Online |
| Weekly magazine offers featured articles from the current issue along with special online-only features. Includes photo collection, archives, ... |
| www.sciencenews.org |
|
| Science in the Yahoo! Directory |
| Explore the fields of astronomy, biology, geology, mathematics, and physics and all of their related disciplines with resources designed for professionals, ... |
| dir.yahoo.com |
|
| Open Directory - Science |
| Agriculture (2454); Anomalies and Alternative Science (525); Astronomy (4208); Biology (20593); Chemistry (4852); Computer Science@ (2358) ... |
| dmoz.org |
|
| BBC - Science & Nature |
| The best of BBC Science and Nature, from TV and radio, to the web and beyond. Take a tour from the smallest atoms, to the largest whales and the most ... |
| www.bbc.co.uk |
|
| Science - Wikipedia, the free encyclopedia |
| Sciences versus Science: the plural of the term is often used but is difficult to ... Science education is also a very vibrant field of study and research. ... |
| en.wikipedia.org |
|
| Popular Science |
| Monthly magazine about current science and technology. |
| www.popsci.com |
|
| Science/AAAS | ScienceNOW: The Latest News Headlines from the ... |
| AAAS web magazine. Some free sample stories, subscription required for full text. |
| sciencenow.sciencemag.org |
|
| ScienceCareers.org | Science Jobs, Funding, Meetings, and Advice ... |
| Searchable database of jobs, sorted by field specialty. Can post resume and curriculum vitae. Includes tips for improving the workplace for employers and ... |
| sciencecareers.sciencemag.org |
|
| American Association for the Advancement of Science |
| Research news, issue papers. Educational programs, science policy (US and international). |
| www.aaas.org |
|
| NASA - Science@NASA |
| News and features about NASA research, aimed at the general public. Includes sections on astronomy, space science, beyond rocketry, living in space, ... |
| science.nasa.gov |
|
| Science NetLinks: Resources for Teaching Science |
| Resources for K-12 science educators. |
| www.sciencenetlinks.com |
|
| Cool Science for Curious Kids |
| Fun and interactive site to help kids appreciate science. Why are snakes like lizards, and monkeys like moose? Find out here. |
| www.hhmi.org |
|
| Welcome to the Science Museum |
| London museum and library of science. Exhibitions cover all areas of science and technology. Includes online exhibits and a learning area. |
| www.sciencemuseum.org.uk |
|
| New Scientist - International News, Ideas, Innovation |
| Weekly science and technology news magazine, considered by some to be the world's best, with diverse subject matter. Articles from current issue and ... |
| www.newscientist.com |
|
| CNN.com - Science and Space |
| Offers news stories related environmental issues, archeology, astronomy, technology, geology and other science topics. |
| www.cnn.com |
|
|