HangZhou JinDiao Hoisting Machinery CO.,Ltd.
Address: Dongfeng Village,Daicun Town,Xiaoshan District,Hangzhou,Zhejiang
Main products: chain hoist, lever hoist, electric hoist, lifting chain, hand puller and so on.
Insulation performance of electric hoist
The corrosion protection design of the electric chain hoist is related to the stability, safety and the length of life of the crane. Sacrificial anode protection method is a new anti-corrosion control method. Can effectively control the surface of electric hoist surface oxidation.
Electric chain hoist corrosion control mainly in the following areas:
1) regularly in the chain electric hoist brushing anti-corrosion paint, isolated from the source;
2) to control the working environment of the electric chain hoist to reduce the concentration and humidity of harmful gases in the atmosphere;
3) the use of sacrificial anode protection method of lifting machinery for cathodic protection, the use of this electrochemical anti-corrosion technology, in order to achieve the lifting machinery anti-corrosion control.
Sacrificial anode protection method is the most important anti-corrosion control method. The principle of electrochemical corrosion of electric chain hoist is to form the original battery on the surface of the metal. The original battery is usually composed of the central carbon rod, the peripheral zinc skin and the electrolyte solution between the electrodes. The central carbon rod refers to the positive electrode and the cathode, Peripheral zinc refers to the negative electrode and anode, cathode and anode will react with the electrolyte, so that zinc ionization.
Specifically, the anode zinc skin will occur on the zinc oxidation reaction, the zinc oxidation into the ionic state and produce electrons, the cathode of the central carbon rod occurs on the hydrogen ion reduction reaction, consumption of electrons, the formation of hydrogen.
As the peripheral zinc particles continue to ionize and continue to produce electrons, leading to the occurrence of anodic corrosion phenomenon, from the chemical point of view known as the sacrificial anode.
The electrochemical corrosion is related to the electrical sequence of the metal element. Once the electrochemical corrosion of the lifting device occurs, the cathode of the original cell in the corrosion is a metal with a high standard electrode potential, the anode is a metal with a low standard electrode potential, and zinc is a standard electrode In the electrochemical corrosion, as the anode zinc is often corroded, so we can in the lifting equipment on the use of white iron and zinc to achieve the lifting of the main material of the protection of steel, this method is Sacrifice the protection of the sun.