SANACON can help you tackle problems related to reinforcement corrosion by means of cathodic protection. Therefore, SANACON has a number of employees with a level 3 certification according to the European standard EN ISO 15257: 2017.
You can rely on SANACON for the following aspects:
Cathodic protection (CP) is a form of corrosion control in which steel is protected by joining it with another metal. The technique originated from the corrosion control of steel structures (e.g. steel pipelines), but its application expanded in the 1970s to steel reinforcement of concrete structures. Cathodic protection can be divided into two types of systems: galvanic or by impressed current.
With CP based on galvanic anodes (also called sacrificial anodes), the reinforcing steel is electrically connected to another metal that is less noble than steel, such as zinc, magnesium or aluminum. A galvanic cell is created by the connection of the two metals, whereby the less noble metal dissolves, i.e. corrodes. The less precious metal therefore sacrifices itself to protect the steel.
In the case of CP with impressed current (ICCP), an inert anode (e.g. carbon or titanium) is applied to or in the concrete. A voltage is applied between the anode and the steel by connecting it to an external power supply. By applying a voltage difference, an ion current flows through the concrete, which ensures that the reinforcing steel functions as a cathode, thereby stopping the corrosion process of steel.
Today, a large part of the construction budget is spent on the repair and maintenance of existing concrete structures. Corrosion of reinforcing steel (popularly called 'concrete rot') is responsible for 55% of all sustainability problems. If problems with reinforcement corrosion are not dealt with, this can lead to cracking in the concrete or the release of concrete debris. The problem of corrosion is nowadays often tackled by a traditional concrete repair. However, this is a process where a lot of concrete has to be removed and replaced, which makes the technology very labor-intensive. Moreover, in recent years many cases have emerged where a traditional concrete repair turned out to be unsustainable. Cathodic protection offers a less invasive alternative to traditional concrete repair, whereby the durability of the repair is also guaranteed for a longer timespan.