Carbon electrodes meaning? carbon electrodes for electrolysis of water
By:Yvonne Sep 02, 2020
Carbon electrode is an electrode composed of carbon elements, including natural graphite electrodes, artificial graphite electrodes, carbon electrodes and special carbon electrodes.
Carbon electrodes meaning?
Carbon electrodes have excellent electrical and thermal conductivity, heat resistance, chemical resistance, high mechanical strength, and easy processing and forming. Widely used in metallurgy, chemical industry, electrochemistry and other industries, such as electrodes for electric arc furnaces, electrodes for electrolysis, electrodes for batteries, etc.
Carbon electrodes are made by mixing pitch coke, petroleum coke and adhesives and then carbonized. The degree of graphitization is not high and the conductivity is not as good as graphite electrodes. It can be used for electrolysis electrodes such as aluminum and magnesium, and battery electrodes.
Carbon electrode technical parameters:
Carbon electrodes are used for
Carbon electrode is a conductive material produced with anthracite and metallurgical coke as the main raw materials (sometimes with a small amount of natural graphite or graphitized broken).
The specific resistance of the carbon electrode is 2 to 3 times larger than that of the graphitized electrode, and the compressive strength at room temperature is higher than that of the graphitized electrode, but the thermal conductivity and oxidation resistance are not as good as the graphitized electrode. Since the main raw materials are anthracite and metallurgical coke with high ash content, the ash content of carbon electrodes is generally 6-10%.
Carbon electrodes are suitable for smelting some common electric furnace steels and ferroalloys in medium and small electric furnaces and ferroalloy furnaces. Because the carbon electrode has a relatively high ash content, it is not suitable for smelting high-grade alloy steel.
The raw materials of carbon electrodes are relatively easy to solve, and there is no need to graphitize during production, and the cost of the product is much lower than that of graphitized electrodes.
After the raw materials are roasted, they are processed mechanically. The mechanical processing includes the smooth surface and the threaded joint holes for connecting at both ends, and the joint for connecting two products.
In order to make the two electrodes better connected, several kilograms of carbon paste prepared from graphite powder, syrup and water should be supplied at the same time per ton of finished product, which should be coated in the joint hole when connecting the product.
Carbon electrodes for electrolysis of water
Generally use inert electrodes to electrolyze water, Such as graphite, platinum, Use a carbon electrode to electrolyze water, adding a small amount of sodium hydroxide to the electrolyte can increase the electrolysis speed.
Carbon and graphite have good electrical conductivity and a higher melting point (about 3800-4200°C). The resistance of carbon electrodes is 2 to 3 times larger than that of graphite electrodes, and the ash content is much larger. Therefore, the allowable current density of graphite electrodes is 200-600A/cm2, while carbon electrodes are 100-200A/cm2. The cross-sectional shape of the electrode is generally round, square or flat. The angle of the electrode tip is generally 45. ~70. . The electrode consumes faster when the angle is small, but it can increase the arc stability. When clamping the electrode, the conductive part of the electrode should be as short as possible under the premise of convenient work. If the extension is too long, the oxidation loss of the electrode will be accelerated.
Carbon electrodes for resistance soldering
It uses the arc formed between the carbon electrode or graphite rod and the workpiece as a heat source for welding. The carbon arc temperature is as high as 3670~5000℃.
Carbon arc welding is generally flat welding, vertical welding, and overhead welding more difficult. It can weld steel, cast iron, non-ferrous metals, etc., and can also be used for surface overlay welding. However, due to the poor protection effect, it is only suitable for occasions with low requirements.
Carbon electrodes price
The carbon electrode price market has changed a lot and is for reference only. Please consult the carbon electrode manufacturer for quotation or Amazon store to find it.