We explain what corrosion is and what types of corrosion exist. Examples and how to avoid it. Also, relationship between corrosion and oxidation.
Corrosion is the process of degradation of certain materials, as a consequence of an electrochemical reaction , that is, of oxide-reduction , from their environment.
It is a natural , spontaneous phenomenon that affects mainly (but not exclusively) metals . The speed of the reaction depends on the temperature at which it occurs, as well as the properties of the elements involved, especially their salinity.
Corrosion is a chemical process in which three factors usually intervene: the corroded element, the environment and generally water . However, there are also corrosive substances, that is, capable of causing corrosion of the materials with which they come into direct contact.
For its part, the metallurgical industry studies corrosion as an important enemy to overcome by its products, especially those exposed to the environment, in architectural or construction pieces. In fact, it is estimated that approximately five tons of steel are lost every few seconds worldwide due to corrosion.
Broadly speaking, there are two types of corrosion: chemical and electrochemical, depending on the type of materials and reactions involved:
Chemical corrosion . It occurs when a material reacts in a corrosive liquid or gas, until completely dissolved or saturated. This can happen in different ways, such as:
Electrochemical corrosion . It generally occurs in metals, when their atoms lose electrons and become ions , and can occur in different ways, such as:
Some examples of corrosion extracted from everyday life are:
The fight against corrosion is part of the metal industries, which have various mechanisms to avoid, or at least slow down, these metal disintegrating processes, such as:
Although it is often not named that way, oxidation is a reaction of corrosion , since in every act of oxidation an electronic exchange occurs, classifiable as electrochemical corrosion.
For this reason, metals left out in the open or submerged in water corrode, as they react with oxygen in the air or water and form oxide layers on their surface, which prevent the chemical reaction from advancing.
However, this oxide layer is mechanically removed and the deeper layers of the metal are exposed to oxygen again, resulting in complete destruction of the material. This process is particularly fast in saline environments, since sodium chloride acts as a catalyst for the reaction, speeding it up.
Cryptocurrency has captivated the world since Bitcoin's mysterious arrival in 2009. It began as a…
Hello, Guys Welcome to our Website. Today we will give you information about a Famous…
Alkenes are chemical elements with double bonds or carbon double bonds. Its general formula is…
Logical semantics is a branch of logic that focuses on studying the meaning of statements…
The Game Boy Advance (GBA) was a popular handheld gaming system developed using the Game…
Soft Puzzle - Drop The Slime APK - Simple and Easy! But that's why this…