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( Rust)
Ferrite (a-iron, d-iron; soft)
Austenite (?-iron; harder)
Spheroidite
Pearlite (88% ferrite, 12% cementite)
Bainite
Martensite
Ledeburite (ferrite-cementite eutectic, 4.3% carbon)
Cementite (iron carbide, Fe3C; hardest) When in contact with water and oxygen, or other strong oxidant or acids, iron will rust. If salt is present, for example, in salt water, the metal rusts more quickly. Iron metal is relatively unaffected by pure water or by dry oxygen. As with other metals, a tightly adhering oxide coating, a passivation layer, protects the bulk iron from further oxidation. Thus, the conversion of the passivating iron oxide layer to rust results from the combined action of two agents, usually oxygen and water. Other degrading solutions are sulfur dioxide in water and carbon dioxide in water. Under these corrosive conditions, iron(III) species are formed. Unlike iron(II) oxides, iron(III) oxides are not passivating because these materials do not adhere to the bulk metal. As these iron(III) compounds form and flake off from the surface, fresh iron is exposed, and the corrosion process continues until all of the iron(0) is either consumed or all of the oxygen, water, carbon dioxide, or sulfur dioxide in the system are removed or consumed. [2] The rusting of iron is an electrochemical process that begins with the transfer of electrons from iron to oxygen.[3] The rate of corrosion is affected by water and accelerated by electrolytes, as illustrated by the effects of road salt (calcium chloride) on the corrosion of automobiles. The key reaction is the reduction of oxygen Because it forms hydroxide ions, this process is strongly affected by the presence of acid. Indeed, the corrosion of most metals by oxygen is accelerated at low pH. Providing the electrons for the above reaction is the oxidation of iron that may be described as follows
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Rust Subcategories
Rust Articles
Oily Skin Care: A Frustrating Problem with a Simple Solution by Therese Higgins
You might disagree, but hear me out on this. If you have oily skin, you really are lucky. The tell-tale signs of aging won't show up on your face as early as they will on the rest of us dry and normal-skinned people. This is because the oil works t...
Here is Why Your Last Diet Didn't Work !!! by Frank T Renner
Are you tired yet of trying out every diet only to find out that it doesn't work? Have you spent a great deal of time and money coming to this realization? Well the truth is that Most Diets Don't Work!
Hello there frustrated dieter ! ...
Organic Companies Give a Man Skin Care He Can Trust by Sally Tyler
Let's face it, many companies give a man skin care that he can not really use. Many products cause dryness and are damaging to the skin, and the results range anywhere from ineffective to worse than before the product was used. I want to talk a bit...
Basic Steps to Avoid Thrush Formation by Robert Melkonyan
Thrush is a form infection that is most common amongst newborns and older adults; this is a type of yeast that tends to develop in the mouth, the tongue and even the throat. While it is common on newborns and elderly people is not completely a rare ...
Who Should Diabetics Trust: Their Own Doctors or Natural Cures Author, TV Pitchman Kevin Trudeau? by Robert Tracy
Type 2 diabetics are desperate to find a solution for their debilitating, degenerative illness. Increasingly, diabetes sufferers are choosing treatment advice from a TV pitchman instead of their own physician.
Once upon a time, people had tot...
Entrust your dental care to a competent dentist New York by Erzana Jones
A slight toothache is usually ignored by most of us, and that is exactly what I had done in the beginning. Now that I have just emerged from the dentist's office with a painful extraction of my tooth, I have realized my mistake of having ignored mino...
A Diabetic Asks: How Do I Find Out If I can Trust This All-Natural Supplement? by Robert Tracy
Chicago, Illinois January 19, 2008 8 Tips to find out if the latest Diabetes Supplement “REALLY WORKS” and is it a Safe, All-Natural, Herbal Nutraceutical that will help to Normalize Your Blood Sugar and Weight...or NOT.
I spend a huge am...
Fitness And Exercise: How To Stop Battling Frustration To Lose Weight by Amy Lundberg
Women who battle frustration and silently scream from failed weight loss attempts, poor health, and lack of will power are not alone. It's not all about exercise and diet. If your spirit isn't with the program, even the best discipline might just lea...
Detoxification Diets: Should They Be Trusted? by Emma Wickham
You've probably come across a few detoxification diets in your search for a real answer to a number of health problems. Such programs are commonly associated with weight loss but there are many other times that call for detoxification diets. Followin...
Weight Loss Frustration - Why We Hate Diets by Paul L. Clark
Why We Hate Diets
By: Paul Clark
Over the years I’ve made many observations of thin people, overweight people and the entire “diet culture” that we have here in America. It seems that overweight people never reach their goals of becom...
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