According to the electrochemical principle to control the corrosion of metals in electrolyte solution is called electrochemical protection, including cathodic protection and anode protection.

　　There are two methods of cathodic protection: sacrificial anode and impressed current Microsoft 70-496 test ① sacrificial anode method is to connect a metal or alloy with more negative electrode potential on the protected metal equipment, so as to prevent or reduce corrosion The advantages of Microsoft 70-503-vb test are simple equipment, convenient installation, no external power supply, no stray current interference, good protection effect and wide application. The requirements for sacrificial anode materials are: the electrode potential of Tiffany Jewelry UK must be negative enough, the anode polarization rate is small; the electricity consumption per unit is large; the self-corrosion is small, the current efficiency is high; the material source is sufficient, the price is cheap, the processing is easy, the installation is convenient, and the environment is not polluted At present, there are three kinds of sacrificial anode materials commonly used at home and abroad: magnesium and its alloy, zinc and its alloy, aluminum and its alloy. ② the impressed current cathodic protection method uses the impressed current to polarize the cathode of the metal to be protected, and the Microsoft 70-506-vb test prevents the corrosion of the micro battery from working, so as to achieve the purpose of protection. The impressed current cathodic protection system consists of three parts: controllable DC power supply, auxiliary anode and reference electrode. Due to the rapid development of electronic industry, impressed current cathodic protection technology has made great progress, and has replaced the sacrificial anode method in many fields. In the protection of ship and underground pipeline corrosion, tiffany jewellery impressed current cathodic protection method has an absolute advantage. In particular, the output potential is automatically adjusted and controlled by the potentiostat. The Microsoft 70-513 test makes the protected equipment always at the best protection potential, and the effect is more significant Anode protection connects the protected metal equipment to the positive pole of the DC power supply, conducts anode polarization through the current, moves the electrode potential to the positive direction, increases to a certain value, the metal will be passivated, thus greatly reducing the corrosion rate. Anode protection can only be used for metals with activation and passivation properties. The new technology of Microsoft 70-516 test has been applied to the production equipment contacting with sulfuric acid, phosphoric acid, organic acid, liquid fertilizer and other media.