Total Specialist Maintenance (TSM) is a specialist concrete repair contractor and also offers specialist design and installation of Galvanic and impressed current cathodic protection.
We are experienced in the supply and installation of the following cathodic protection systems.
Frequently asked questions about Total Specialist Maintenance cathodic protection injection for construction, Rail, Water industry, food and drink industry, Commercial, health care, highways, local authorities and infrastructure sectors and technical queries regarding cathodic protection
For any additional information that is not listed please contact our technical team
Cathodic protection works by connecting the reinforcement to another material that is anodic in relation to it. The reinforcement becomes a cathode and its corrosion is substantially reduced. There are two systems: sacrificial anode and impressed current.
The principle of cathodic protection is to connect an external anode to the metal to be protected and to pass a DC current between them so that the metal becomes cathodic and does not corrode.
Such protection should last for 30 years or longer. Onshore, short pipelines are often protected using magnesium anodes. These are cast onto steel cores and connected to the pipeline with cables. In soils of low electrical resistivity, extruded or continuously cast and hot-rolled zinc ribbon is used.
It is used to control the corrosion of a metal surface by transferring the corrosion from the protected structure to a more easily corroded metal. In other words, it controls the corrosion of a metal surface by making it the cathode of an electrochemical cell.
There are two types of cathodic protection: galvanic anode and impressed current cathodic protection. Both provide a cathodic protection current flow from cathodic protection anodes placed within the same electrolyte as the metal to be protected.
A process known as cathodic protection can be used to prevent rust formation. The iron to be protected is attached to another metal such as zinc or magnesium, which give up electrons to oxygen more readily than does iron. The so- called sacrificial cathode will then corrode and the iron will not.
The main difference between the two methods is that the impressed current cathodic protection uses an external power source with inert anodes while the sacrificial anodes cathodic protection uses the naturally occurring electrochemical potential difference between different metallic elements to provide protection
The technique of providing cathodic protection to steel preserves the metal by providing a highly active metal that can act as an anode and provide free electrons. By introducing these free electrons, the active metal sacrifices its ions and keeps the less active steel from corroding.