Electrochemical treatment of metals
Are you interested in the characteristics of electrochemical machining of metals, steels and alloys from the supplier company AvecGlob? Here you will find interesting information on this topic.
The essence of technology
Electrochemical treatment is used to form the workpieces of metals and alloys, which are difficult or impossible to process mechanically. This process is based on the classical Faraday electrolysis laws, requiring basically two electrodes, an electrolyte, and a current source.
In a real process of electrochemical processing, the cathode has the form of a tool (a mirror image of the workpiece), and the anode is the blank itself. Between the tool and the working medium, a clearance of 0.05 to 0.7 mm is provided, where an electrolyte flows at a speed of 30−60 m / s. The electrolyte is pumped at high pressure (up to 2 MPa) through the gap and circulates at a speed high enough to conduct a current between the cathode and the anode. Removal of the removed metal is carried out by dissolution.
Process parameters
The electric current is from 50 to 40000 A at a voltage of 5 to 35 V and a current density of 20 to 300 A / cm 2. In the electrolytic circuit, the direction of the current is from the workpiece through the power source to the tool. The process of electrolysis, which occurs on the cathode, releases hydroxyl ions (OH-) and free hydrogen. Hydroxyl ions combine with the ions of the anode metals to form insoluble metal hydroxides, and therefore the material is removed from the anode.
Supplier — AvekGlob Company — offers at affordable prices from the manufacturer various metals and alloys successfully subjected to various electrochemical processing operations, in the quantity and range required by the customer. The supplier guarantees the timely delivery of products to any address specified by the consumer
Requirements for the main components of the process
Usually electrolytes are sodium chloride, sodium nitrate, sodium hydroxide, sodium fluoride, sodium chlorate, potassium chloride and sulfuric acid. These solutions form insoluble compounds in the form of a precipitate.
The main functions of electrolyte:
transfer of current between the tool and the workpiece;
Removal of treatment products;
Dissipation of heat released during surgery.
The main characteristics of the electrolyte are good electrical conductivity, non-toxicity and chemical stability, low viscosity and high specific heat.
General requirements for the tool material: good electrical conductivity, stiffness, chemical inertness, easy handling.
This type of processing can be used to remove metal only from materials with good conductivity. The removal of the material is due to its dissolution which is determined by the Faraday laws.
Advantages and limitations of the process
The accuracy of the electrochemical treatment depends on the voltage, the speed of the electrode electrode, the temperature of the electrolyte and its concentration. The electrode practically does not wear out, therefore it can be used repeatedly with a high degree of accuracy. Electrochemical treatment is suitable for brittle alloys, as well as parts with thin walls and with low stiffness. Disadvantages — high specific energy consumption, the possibility of corrosion of the billet in solution.
Supplier — AvekGlob Company — offers to purchase various metals and alloys subjected to electrochemical processing technologies, in any quantity and range of sizes. Products can be bought at a price formed on the basis of European and world standards of production. Implementation is possible in bulk and retail, for regular customers, a flexible system of discounts operates.