In modern society, with the rapid development of electricity, transportation, radar stations, and electrified railways, related high-voltage power transmission and distribution and carrier transmission facilities continue to increase. Strong current and electromagnetic wave energy radiate to the air and ground, leading to more current interference. This stray current voltage flows between the stainless steel water pipe channel and the wall, which can easily lead to "current corrosion" in the production of stainless steel water pipes.
This type of corrosion has a fast rate and an increased frequency of occurrence, which requires everyone's attention and more research on prevention and control measures.
1, What is "current corrosion" and "current corrosion", also known as electrochemical corrosion, may occur when there is a significant difference in electrochemical potential energy between two metals. If carbon steel comes into contact with other metals and stainless steel, it is driven by stray currents, causing both metals to generate current circuits, both components will cause electrochemical corrosion.
If the corrosion rate is accelerated under the continuous action of current, the component will be corroded in a short period of time.
2, The causes and analysis of "current corrosion"
1. The generation and definition of stray current: AC stray current mainly comes from the transmission, induction, and feeding of industrial electricity. Substations, radar stations, aircraft carrier launchers, and nearby wired stations will generate strong AC stray currents.
DC stray current mainly consists of electrified railways, DC motor appliances, various grounding and lightning protection devices, etc. The definition of stray current is "the current flowing on an unspecified return path.".
This is defined as stray current as long as there is no current flowing along the desired path.
2. The mechanism of "current corrosion" in stainless steel water pipe parts: due to external variable currents, voltages, and human factors, stray currents are generated in the construction wall.
The installation of stainless steel water pipe channels is not insulated, allowing the stainless steel water pipe to come into contact with the wall (or other pipes) through pipe clamps, brackets, etc., forming a closed loop of current and causing current corrosion.
3, The reason for the current corrosion of stainless steel water pipes is that when two metals with a large potential difference, such as carbon steel and stainless steel, come into contact with the surrounding environment, voltage, and current, electrochemical corrosion will occur.
