Influence of structural form of elements on corrosion of metal structures
| Autor: | S. N. Gushchin |
|---|---|
| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | IOP Conference Series: Materials Science and Engineering. 919:022047 |
| ISSN: | 1757-899X 1757-8981 |
| Popis: | The article considers the influence of the structural form of elements on the corrosion of metal structures. Corrosion is the spontaneous destruction of metals and alloys as a result of chemical, electrochemical or physical-chemical interaction with the environment. Usually, local corrosion is the result of the concentration of the anode reaction of metal ionization on certain small areas of the metal surface, while the rest of the surface is mainly cathodic reactions. The most typical example of local corrosion due to structural features of metal is intergranular corrosion of stainless steels and aluminum alloys. A high rate of metal ionization along the boundaries of grains or intermetallic compounds leads to the predominant dissolution of these sites, which weakens the bond between individual crystals. When designing the equipment, it is not necessary to cover individual parts of the device with insulating materials, and it is also necessary to exclude the possibility of solid precipitation and scale. The latter is partially achieved by the correct choice of the electrolyte speed and continuous mechanical removal of precipitation. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|