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Life of electric heating element of explosion-proof electric heater

Author: Source: Time: 2019-11-28 Category: Industry News
The service life of the explosion-proof electric heater electric heating alloy element depends on the oxidation rate of aluminum in iron-chromium aluminum alloy or chromium in nickel aluminum alloy. When the electric heating alloy element is heated to a high temperature for the first time, a dense oxide film such as alumina or chromium oxide is formed on its surface, thereby greatly delaying the oxidation rate of the electric heating alloy element of the explosion-proof electric heater.
The service life of the explosion-proof electric heater electric heating alloy element depends on the oxidation rate of aluminum in iron-chromium aluminum alloy or chromium in nickel aluminum alloy. When the electric heating alloy element is heated to a high temperature for the first time, a dense oxide film such as alumina or chromium oxide is formed on its surface, thereby greatly delaying the oxidation rate of the electric heating alloy element of the explosion-proof electric heater . As the service time continues, the surface oxide layer may be under-etched or peeled off, causing the surface layer of the electrothermal alloy material to suffer losses, reducing the diameter of the electric heating wire, and increasing the resistance value. Generally, when the resistance value of an electrothermal alloy element increases by 15-20%, its life ends. obviously. The service life of the electric heating alloy wire is related to the cross-sectional area of the explosion-proof electric heater material. The electric heating alloy wire with a large cross-sectional area is durable.

In actual use, for the open type electric heating alloy wire, the ambient atmosphere also affects its service life.