【Corrosion Technology Edition】Daily Question 20170716: What is wet corrosion?
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Wet corrosion refers to the corrosion of metal materials in the presence of water
Wet corrosion: The corrosion of metals in aqueous solutions is an electrochemical reaction. A corrosion cell is formed on the metal surface, with an anode area separated from a cathode area; the metal loses electrons in the solution and turns into positively charged ions, which is an oxidation process, namely the anodic process. Meanwhile, on the metal surface in contact with the aqueous solution, electrons have many opportunities to be neutralized by a substance present in the solution; the process of neutralizing electrons is a reduction process, that is, a cathodic process. Common cathodic processes include the reduction of oxygen, hydrogen evolution, the reduction of oxidants, and the deposition of precious metals.
Corrosion refers to the process of degradation and damage (of metals and non-metals alike) under the action of surrounding media such as water, air, acids, bases, salts, solvents, etc.
Wet corrosion refers to the corrosion of metals in the presence of water, and it is an electrochemical reaction.
Wet corrosion refers to the corrosion of metals in the presence of water, while dry corrosion refers to corrosion in dry gases in the absence of liquid water.
The corrosion of metals in aqueous solutions is an electrochemical reaction. A corrosion cell is formed on the metal surface, with an anode area separated from a cathode area; the metal loses electrons in the solution and turns into positively charged ions, which is an oxidation process, namely the anodic process. Meanwhile, on the metal surface in contact with the aqueous solution, electrons have many opportunities to be neutralized by a substance present in the solution; the process of neutralizing electrons is a reduction process, that is, a cathodic process. Common cathodic processes include the reduction of oxygen, hydrogen evolution, the reduction of oxidants, and the deposition of precious metals. As the corrosion process progresses, in most cases the cathodic or anodic processes are slowed down due to the diffusion being hindered by corrosion products that block the solution ions; this phenomenon is known as polarization, and the corrosion of the metal slows down as a result of polarization.
The corrosion of metals in aqueous solutions is an electrochemical reaction. A corrosion cell is formed on the metal surface, with an anode area separated from a cathode area; the metal loses electrons in the solution and turns into positively charged ions, which is an oxidation process, namely the anodic process. Meanwhile, on the metal surface in contact with the aqueous solution, electrons have many opportunities to be neutralized by a substance present in the solution; the process of neutralizing electrons is a reduction process, that is, a cathodic process. Common cathodic processes include the reduction of oxygen, hydrogen evolution, the reduction of oxidants, and the deposition of precious metals. As the corrosion process progresses, in most cases the cathodic or anodic processes are slowed down due to the diffusion being hindered by corrosion products that block the solution ions; this phenomenon is known as polarization, and the corrosion of the metal slows down as a result of polarization.
The corrosion of metals in aqueous solutions is an electrochemical reaction. A corrosion cell is formed on the metal surface, with an anode area separated from a cathode area; the metal loses electrons in the solution and turns into positively charged ions, which is an oxidation process, namely the anodic process. Meanwhile, on the metal surface in contact with the aqueous solution, electrons have many opportunities to be neutralized by a substance present in the solution; the process of neutralizing electrons is a reduction process, that is, a cathodic process. Common cathodic processes include the reduction of oxygen, hydrogen evolution, the reduction of oxidants, and the deposition of precious metals. As the corrosion process progresses, in most cases the cathodic or anodic processes are slowed down due to the diffusion being hindered by corrosion products that block the solution ions; this phenomenon is known as polarization, and the corrosion of the metal slows down as a result of polarization.