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Why should you choose cathodic protection technology? What benefits does it bring? Let's listen to the detailed introduction of industry experts.
Cathodic protection technology is a kind of electrochemical protection technology, the principle of which is to apply an impressed current to the surface of the corroded metal structure, and the protected structure becomes the cathode, so that the electron migration of metal corrosion can be inhibited, and the occurrence of corrosion can be avoided or weakened. The surface of a metallic material exposed to the electrolyte has multiple microscopic anode and cathode positions. Cathodic protection manufacturers point out that when the electronegativity of the anode is stronger than that of the cathode, there will be a potential difference between them, and corrosion will occur.
The purpose of cathodic protection is to reduce the potential difference between the cathode and anode to a negligible value. This reduction in potential difference is mainly due to the polarization of the cathode, which can be mitigated according to Ohm's law. Cathodic protection can be achieved by applying an impressed current to the surface of the corroded metal structure.
The reason for the formation of corrosive batteries is mainly due to the adsorption of moisture in the air on the metal surface, forming a layer of water film, so that CO and other gases in the air are dissolved in this layer of water film to form an electrolyte solution, and the metal soaked in this layer of solution is always impure, such as industrial steel, which is actually an alloy material, that is, in addition to iron, it also contains graphite, cementite and some other metals and impurities, most of which are not as active as iron.
In this way, the anode of the corroded battery is iron, and the cathode is impurities, and because the iron is in close contact with the impurities, the corrosion is continuous. The ease with which a metal material can corrode depends on factors such as the grain structure of the metal, the composition of the alloy, and the temperature at which the metal surface is subjected to during manufacturing and whether it is deformed.
In most cases, when the metal is placed in an aqueous solution or in a humid atmosphere, a micro-cell will form on the surface of the metal, sometimes called a corrosive battery (its electrodes are generally referred to as cathodes and anodes). Cathodic protection manufacturers undergo oxidation reaction on the anode, so that the anode dissolves, and on the cathode, a reduction reaction occurs, which generally only plays the role of electron transfer.
The performance and practical effect of the magnesium anode products developed by Suzhou Bogao Sacrificial Anode Manufacturing Co., Ltd. are particularly outstanding. In addition, the company not only has a very rich experience in the professional research and development and production of various types of sacrificial anodes, especially zinc blocks or zinc anode products, but also has high quality products, performance and actual utility are also very prominent, and plays an irreplaceable role in the actual industrial anti-corrosion field, so it is well received by the industry, and because of this, the company can become the most reliable supplier of sacrificial anode products in the region.
