|
News & Info
|
 |
 |
Seller Signup...
Quality Service, Seller or Tradesperson? Sign Up Now!
|
|
Home & Garden Articles
Anti Rust - Corrosion - Corrosion Protection
Tue 29 May 2007 - 14:54
Anti Rust - Corrosion - Corrosion Protection
By Rose Diana
Rust is permeable to air and water which allows for the corrosion of the metal even after a rust surface layer has formed. Aluminium corrosion is not the same as the corrosion of steel or iron. In aluminium corrosion, aluminium oxide is formed on the aluminium surface which forms a protective, corrosion resistant coating. This process is known as passivation.
More modern coatings that is used for anti rust purposes will add aluminium to the coating as zinc-alume, aluminium will migrate to cover scratches and which in turn provides protection for longer.
There are several other methods available to anti corrosion purposes and prevent the formation of rust, colloquially termed rust proofing or anti rust.
* Cathodic protection is one method in which the iron is made as a cathode in a battery formed whenever water contacts the iron and also a sacrificial anode made from something with a more negative electrode potential, commonly zinc or magnesium. The electrode itself doesn't react in water, but only to provide electrons to prevent the iron rusting.
* Bluing is a technique that can provide limited resistance to rusting for small steel items, such as firearms; for it to be successful, water-displacing oil must be rubbed onto the blued steel.
* Corrosion control is done using a coating to isolate the metal from the environment, such as paint. Large structures such as ships and modern automobiles, often have a wax-based product (slushing oil) injected into these sections. This contains rust inhibiting chemicals as well as forming a barrier. Covering steel with concrete provides protection to steel by the high pH environment at the steel-concrete interface. However, if concrete covered steel does corrode, the rust formed can cause the concrete to fall apart. This creates structural problems.
To prevent rust corrosion on automobiles, they should be kept cleaned and waxed. The underbody should be sprayed to make sure it is free of dirt and debris that could trap moisture. After a car is washed, it is best to let it sit in the sun for a few hours to let it air dry. In winter, or in salty conditions, cars should be washed more regularly as salt (sodium chloride) can accelerate the rusting process.
http://www.zerust.com
http://www.mostnic.ru
Article Source: http://EzineArticles.com/?expert=Rose_Diana
http://EzineArticles.com/?Anti-Rust---Corrosion---Corrosion-Protection&id=579126
Looking for information on General Home Improvement, Find a supplier at HomeWise.ie
back to General Home Improvement articles
back to all home & garden articles
|
|