The forced current cathodic protection system, also known as the impressed current system, embeds an auxiliary anode in the same electrolyte environment around the protected structure, through the DC power supply to assist the anode as the anode, and the protected structure as the cathode to form the power supply loop. To the protected metal, the protected metal is forced into a cathode to perform cathodic protection. 2) What is a sacrificial anode cathodic protection system? Stainless Steal CNC Milling Parts Stainless Steal Cnc Milling Parts,Aluminum Parts Cnc Machining,Metal Cnc Machining,Luninum Cnc Machining JIANGSU TONGDE INTERNATIONAL TRADE CO.LTD. , https://www.tongdetrades.com
The sacrificial anode method is to electrically connect a metal or an alloy whose potential is more negative than the metal to be protected to the metal to be protected, and to protect the other metal by continuously corroding the generated current by the negative metal. method.
3) What is the composition of the forced current cathodic protection system?
The forced current cathodic protection system mainly consists of power supply, control cabinet, auxiliary anode, coke (carbon) filler, cable, control reference electrode, potential test pile , current test pile, protection effect test piece, electrical insulation device, and electrical insulation protection device. .
4) What is the role of the power supply?
The role of the power supply is to provide uninterrupted current to the cathodic protection system. The power supply mainly has a constant current, a constant voltage rectifier, and a potentiostat .
5) What are the main types of power supply?
From the rectification form, there are mainly thyristor, magnetic saturation, and digital high-frequency switch. The thyristor and magnetic saturation potentiostat have large volume, large ripple coefficient, poor control precision, and low efficiency (less than 70%), which is difficult to digitize. In addition to the above-mentioned deficiencies, the magnetic saturation potentiostat cannot control the output with a rated power of 20% or less. The digital high-frequency switching potentiostat has small volume, small ripple coefficient, high control precision and high efficiency (more than 90%).
6) What is the role of the auxiliary anode?
The role of the auxiliary anode is to form an electrical circuit with the medium (such as soil, water), power supply, and pipeline through its own dissolution.
7) What is the type of auxiliary anode?
The auxiliary anode is divided according to the medium. There are scrap steel, ferrosilicon, graphite, mixed oxide anode and flexible anode in the soil. There are mixed oxide anodes, ferrosilicon anodes, lead anodes, etc. in the aqueous medium.
8) What are the control reference electrodes?
The control reference electrode mainly has a long-life saturated copper sulfate reference electrode, a high-purity zinc reference electrode, a silver/ silver chloride reference electrode , and a molybdenum dioxide reference electrode. A saturated copper sulfate reference electrode and a high purity zinc reference electrode can be used in the soil, and a high purity zinc reference electrode and a silver/silver chloride reference electrode are used in the aqueous medium. The molybdenum dioxide reference electrode is mainly used in concrete. The life of a saturated sulfuric acid reference electrode is generally less than 10 years. Other reference electrodes can be designed based on their lifetime.
9) Why do you need electrical insulation?
In cathodic protection technology, it is required that the protected structure needs electrical insulation, mainly because if the insulation current is lost to the unprotected metal structure without insulation, the current demand of the design may be insufficient, and the protection effect is not satisfactory. It will cause interference from stray currents.
10) What is the role of the test pile?
The role of the test pile is mainly used to detect the cathodic protection effect and operating parameters. According to the different effects, there are potential test piles, current test piles, and protective effect test pieces to test piles.
11) What is the composition of the sacrificial anode cathodic protection system?
In the soil, the sacrificial anode cathodic protection system mainly consists of a sacrificial anode, a filling material, a cloth bag, a patch, a cable, and a test pile. The sacrificial anode is directly soldered to the protected structure in a water environment.
12) What are the main sacrificial anodes (http://)?
The sacrificial anode mainly includes a magnesium alloy sacrificial anode , an aluminum alloy sacrificial anode, and a zinc alloy sacrificial anode. Magnesium alloy sacrificial anodes are mainly used in high resistivity soil environments. Aluminum alloys and zinc alloys are mainly used in water environment media. Zinc alloys can also be used in environments where the soil resistivity is less than 5 Ω·m.