Long-service-life electrode boiler electrode bar and preparation method thereof

Abstract

The invention aims to provide a long-service-life electrode boiler electrode bar and a preparation method thereof. The long-service-life electrode boiler electrode bar is remarkably prolonged in service life because of high electrochemical corrosion resistance. The long-service-life electrode boiler electrode bar is composed of, by weight, equal to or smaller than 0.0015% of oxygen, equal to or smaller than 0.05% of carbon, 0.16% to 0.26% of silicon, 0.29% to 0.40% of manganese, 0.018% of phosphorus, 0.0015% of sulfur, 0.001% to 0.002% of aluminum, and the balance iron. The ferritic structurein the long-service-life electrode boiler electrode bar is no smaller than 85%, and the surface smoothness of the long-service-life electrode boiler electrode bar is N5 or higher. The service life ofthe long-service-life electrode boiler electrode bar can be ten years or more. An electrode bar in the prior art is seriously corroded after being used for three years and needs to be replaced. Therefore, the long-service-life electrode boiler electrode bar has the characteristic of being remarkably prolonged in service life because of high electrochemical corrosion resistance.

Description

technical field [0001] The invention relates to a long-life electrode boiler electrode rod and a preparation method thereof. Background technique [0002] In recent years, air pollution has received more and more attention, especially PM2.5, which has always been a hot issue of public concern. There are six important sources of PM2.5, namely soil dust, coal burning, biomass burning, vehicle exhaust and garbage incineration, industrial pollution and secondary inorganic aerosols. Among them, PM2.5 produced by coal burning accounts for about 18%, which has a huge impact on the formation of haze weather. Therefore, the country began to implement the "coal to electricity" policy to replace coal burning with electric boilers to reduce environmental pollution. [0003] At present, electric boilers are widely used in the "coal-to-electricity" project. The new electrode boilers that have been developed are not afraid of dry burning, not affected by high and low voltages, no scale, ...

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Problems solved by technology

[0003] At present, electric boilers are widely used in the "coal-to-electricity" project. The new electrode boilers that have been developed are not afraid of dry burning, not affected by high and low voltages, no scale, fast heating, high electrothermal conversion rate, no noise, The structure is simple and practical, and it is not affected by the external environment. However, the life of the electrode rods used in this type of electric boiler has always been a major problem for manufacturers. When the electrode rods are working, due to the electrochemical reaction of the electrolyte, the electrode rods are severely corroded. , but frequent replacement of electrode rods will increase user costs and affect product quality

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