Corrosion Control
Corrosion is the process where metals are broken down due to exposure to the elements, including water, oxygen, and acids. Corrosion control and prevention are important to keep many types of equipment functioning properly.Passivation
Passivation is important to corrosion control and prevention. Passivation occurs when there is a spontaneous reaction in a metal where the surface forms an extremely thin layer of corrosion which, in turn, prevents any additional corrosion. Metals that can have this type of reaction under the right conditions include aluminum, copper, and stainless steel. Technology has existed since the 18th century to induce the passivation process.
There can still be problems with metals that have been passivated. Pitting is a process where small holes are created in metal. These holes may be small on the surface, yet reach deep into the metal. Problems can also occur during the welding process when using stainless steal, resulting in weld decay.
Surface Treatments
One method of corrosion control and prevention is to coat the surface of the metal with another material that is corrosion resistant. These materials can include other metals, resins, plastics, or paints. Galvanization is included in this category.
Consequences of Corrosion
On a national level, the costs of corrosion are exorbitant. According to a study conducted in 2002 by CC Technologies Laboratories, Inc, industry in the United States chalks up $276 billion a year in costs related to corrosion. Another study conducted by Battelle Columbus Labs states that $100 billion of this amount could be saved using proper corrosion prevention methods.
On a factory level, corrosion can cause the breakdown of a piece of equipment, leading to manufacturing down time and a loss of productivity. Without proper corrosion control and maintenance, an equipment breakdown can wreak havoc in a busy factory's schedule.
Corrosion can also cause other problems at home. You might not readily notice a corroded pipe that has a slight leak. The leak might be small enough that it does not impact your water bills. However, the leak might be large enough that, over time, mold starts to grow. Mold might contribute to family illnesses. And eventually, the pipe will start to leak more water and ultimately fail.
Let us not forget the possible consequences of stepping on a rusty nail…
Corrosion Control
Corrosion control is important both at the workplace and at home. At work, improper corrosion control can lead to costly breakdowns in equipment and loss of productivity. At home, corrosion control is important for everything from lawn furniture to plumbing.