The Devastating Effects of Corrosion
Many industries fear the word corrosion, as it a devastating and costly problem to try and contain. Without advancements like galvanizing and protective sealing or coating, entire factories find themselves shut down and out of operation. Some applications rely on more continuous protection, such as the inclusion of deaerator systems in boiler tanks. If corrosion is left unchecked, irreparable harm could be the result.
What is Corrosion?
Rust and corrosion are similar in that it is a negative reaction between an element and its environment, which creates the decay of metals. There are several forms of decay, and corrosion can be broken down into ten categories.
1. General attack. This form is also known as uniform attack corrosion and it is the most common type of corrosion. It is caused by an electrochemical or chemical reaction that destroys the exposed surface of the metal. This is predictable form of corrosion and can be managed and prevented.
2. Localized corrosion. This type only affects specific areas on a metal structure. It can create pitting, crevice corrosion, or filiform corrosion. By stopping these areas before they spread, you can avoid structural weakness.
3. Dissimilar metal corrosion. This occurs when a galvanic couple bonds between two metals that are in electrical contact. One is an anode and the other a cathode. The anode will deteriorate more quickly, and the cathode more slowly.
4. Environmental cracking. This corrosion process occurs when environmental conditions affect the metal substance. Things like temperatures, chemicals, and stress-related condition can impact environmental corrosion.
5. Selective leaching. With this corrosion, a singular element of the allow begins to corrode. When brass experiences de-zincification a deteriorated copper is the result.
6. Flow-assisted corrosion. When the protective layer on a metal is dissolved by water or wind, the underlying metal is exposed to the elements and corrosion occurs.
Corrosion can be prevented in many situations and managed in others. By protecting metals from corrosion, you protect the industries keeping the economy alive as well as the environment.