Acid graphite rod as non metal products, as carbon arc gouging cutting process in an essential pre welding cutting supplies, is composed of carbon and graphite with appropriate adhesive, through the extrusion, the temperature of 2200 DEG C after baking rotary plating a layer made from copper, high temperature resistance, good electrical conductivity, not easy to fracture, suitable for metal cutting into required shape.

　　Due to the acid resistant graphite rod using the temperature of high conductivity and good chemical stability. It has been widely used in machinery, metallurgy, national defense, chemical, foundry, non-ferrous alloy, light and other fields, especially the black acid graphite rod, was also used for the field of ceramics, semiconductors, medicine, environmental protection, laboratory analysis, become non metallic materials widely used. When cutting steel, the use of flammable, explosive gas, such as oxygen acetylene flame cutting is not required, the cost is low, operation and use of safety. You can use the method of processing a variety of arc cutting can not use gas cutting processing of metals, such as iron, stainless steel, copper, aluminum, high efficiency, and can obtain the ideal effect.

　　Performance of acid resistant graphite rod:

　　The element is hard and brittle texture, low expansion coefficient, can quench heat, not easy to deformation, good chemical stability, acid resistance is extremely strong, does not react with acid, alkali resistant ability is poor, can decompose rod under high temperature corrosion.

　　The bending strength of the acid proof graphite rod is more and more larger with the increase of the temperature of the component. The resistance value, and is reflected by the resistance, according to the standards stipulated in the 25 meters by micro ohms. The surface load current density of the element is closely related to the raw material formula and the pressing density of the black acid proof graphite bar, and can be arbitrarily adjusted according to the requirement.

　　Acid proof graphite rod:

　　1, acid resistant graphite rod must be kept dry, damp must be dried before use.

　　2, used in the DC power supply of acid resistant graphite rod connected to the positive electrode, the work of the negative electrode.

　　3, compressed air pressure to maintain 0.5-1.6MPa.

　　4, acid resistant graphite rod and the arc distance between the workpiece is about 3mm, acid proof graphite stick out of the clamp is about 100mm.

　　5, acid resistant graphite rod and the workpiece into a 45 degree angle, and along the tangent (or straight line) direction planing.

　　6, acid resistant graphite rod must be well ventilated when used. Operating current operation.

　　Application domain:

　　Graphite and graphite products are widely used in various fields of machinery, electronics, semiconductor, silicon, metallurgy, petroleum, chemical, textile, electrical appliances, motor, electric, transportation, communications, aviation, atomic energy, medicine, food, biological engineering, etc..

　　With the development of railway transportation, the request of the train itself is further improved, especially in the load and speed. With the increased speed, increased load, wear the train wheel flange also intensifies, at the same time, also aggravate the rail wear. The rims of the maintenance, replacement has caused huge waste, and the consumption of maintenance and replacement of rails is more beyond imagination. So, the train locomotive wheel flange lubrication on the imminent problem. The train locomotive flange lubrication refers to the lubrication measures in locomotive wheel and rail contact, the contact surface friction, reduce wear and tear on the train and railway tracks and loss of flange. The train locomotive wheel includes lubricating grease lubrication and dry lubrication used. The grease is spraying lubricating grease in the train to the rim and the rail contact surface, thereby reducing the friction coefficient, friction reduction. Dry lubrication and grease lubrication principle is the same, is to replace the solid lubricant grease. Dry lubrication has many advantages which are not possessed by grease lubrication, and can achieve better lubrication effect. For example: environmental protection, energy saving, etc.. In the control, the use of pneumatic control, making the entire lubrication system is simple and easy to control. And pneumatic system components are using the national standard parts, more suitable for practical application

　　The main difference between dry and wet lubrication is the change of the body. The solid lubricant is mainly based on graphite and other mineral mixture as the base of the lubricating rod. Solid lubricant with the spring machinery device with sliding friction contact surface flange, and maintain a certain pressure. When the locomotive wheel rotates, it Ever fount solid lubricant over the train flange surface, stored in the concave micro uneven, in under the action of shear layer, easy to form a strong adhesion force and load bearing capacity of high polymer as the theme of the multi composite solid lubricating film. The film is formed at the top of the friction surface, and gradually extends to form a continuous solid lubrication film. The film is continuously transferred to the inner surface of the top of the rail with the wheel rotation, and the film is formed on the surface of the film. Solid lubricating film separates the train locomotive wheel and rail friction interface, realize the wheel rail lubrication line. Due to the heavy load, the local solid lubrication film is damaged, and the continuous flow of the lubricating film is added to achieve dynamic balance. The solid lubrication film is the friction between the wheel / rail to maintain at a low level, to reduce the wheel / rail wear rate, improve the relationship between the wheel and rail, extend its service life, improve the economic efficiency of transport purposes.

Graphite electrodes material are characterized by superior compact structure, good electrical and thermal conductivity, high resistance to oxidation and corrosion in high temperature. The regular power graphite electrodes graphite electrodes for heavy industrial arc furnaces, steel mills, foundries, and other applications.

　　There are a lot of selection criteria for graphite electrode material, but the main selection criteria are four.

　　1.Average particle diameter of graphite electrode materials

　　Average particle diameter of graphite electrode materials Direct influence on the discharge of materials。The smaller the average particle size of the graphite electrode material, the more uniform the discharge of the material, the more stable the discharge, the better the quality of the surface.。For the surface machining accuracy of the casting die casting die, recommend the use of coarse particles of material， For the higher accuracy of the processing of the electronic mold, recommended the use of smaller particles of the material, in order to ensure the accuracy of the processing mold, surface finish。The smaller the average particle size, the smaller the loss of the material in the process.。

　　2.Flexural strength of graphite electrode materials

　　The flexural strength of the graphite electrode material is the direct embodiment of the material strength. Show close degree of internal structure

　　3.Shore hardness of graphite electrode materials

　　In the subconscious of the general people, graphite is considered to be a kind of strength of the material, but in the actual measurement data and application show that the strength of graphite, higher than the metal material。

　　4.Intrinsic resistivity of graphite electrode materials

　　If the average particle size of the graphite electrode material is the same, the resistivity of the electrode material is slower than the resistivity of the material. For the same average particle size of the electrode material, the resistivity of the material, its strength and hardness will be corresponding to the resistivity of the graphite electrode material. Discharge speed, loss will be different, so according to the actual application of the need to choose the appropriate material is very important.

　　These four kinds of data represent the main discharge performance of the material, and directly determine the performance of the material.

　　Graphite rod surface by potential cycling. No interference effect of the most common ions such as sodium, potassium, chloride, nitrate, iodide, calcium, zinc, aluminum, sulfate and sorbitol was observed during electrochemical determination of fluoride. The graphite felt was oxidized at a positive electrode potential in sulfuric acid solution. The electrochemical performance of the treated graphite felt served as electrode for vanadium redox battery was investigated with FT-IR, On the other hand, the PAPBA/GR electrode showed not only good sensitivity and selectivity, but also relatively rapid response to changes of analyte concentrations in the range of 20s.

　　The PAPBA-modified graphite rod (PAPBA/GR) electrode prepared in this way was used for potentiometric fluoride determination. The linear calibration range was from 5x10(-4) to 5x10(-2)M with the slope of the linear part of the calibration curve of 42.5mV/logC. SEM, XPS, BET, cyclic voltammetry and testing VRB system, respectively. The results show that the molar ratio of O to C increases from 0.085 to 0.15 due to the increase of —COOH functional groups during electrochemical oxidation treatment, and the GF surface is eroded by electrochemical oxidation, resulting in the surface area increase from 0.33 m2/g to 0.49 m2/g. The VRB with modified GF electrode exhibits excellent performance under a current density of 30 mA/cm2. The average current efficiency reaches 94% and average voltage efficiency reaches 85%. The improvement of electrochemical activity for the electrode is ascribed to the increase of the number of —COOH group and the special surface of GF.