In many areas of public life no attention is paid to corrosion – until it causes a dramatic damage event. Only then does corrosion come into focus, although the costs incurred as a consequence of corrosion in industrialized countries add up to three to four percent of the gross domestic product – a multi-billion dollar amount! However, a current study by the World Corrosion Organization (WCO) shows that the resulting damage is not limited to economic loss: corrosion puts public safety at risk, lowers the quality of life and may cause damage to health and the environment. Leaking water pipes are one example, causing the seeping away of large quantities of drinking water. Corrosion may have negative consequences on the safety of bridges, road structures and buildings. Many technologies for regenerative energies such as offshore wind farms or turbines for tidal power plants depend on solutions for the respective corrosion problems being found.


Technically speaking, corrosion (from the Latin corrodere, “decompose, decay, gnaw”) is the reaction of a material with its environment, causing a measurable change to the material and possibly leading to a functional impairment of a component or the system. Chemical corrosion can affect metals (DIN EN ISO
8044; previously DIN 50900).

Carapax-Rost-Illu E

The most commonly known type of corrosion is rusting, the oxidation of iron. The oxidant in this redox reaction is oxygen dissolved in water. The result, rust, is therefore an iron and oxygen compound. The corrosion reaction is significantly accelerated by the impact of stimulants such as chlorides and sulfates.
Type and velocity of the reaction are also dependent upon the location of the building and the ambient conditions.

In geology, corrosion is perceived as the decomposition of rocks from exposure to water. Weathering processes of this kind also affect buildings, thus corrosion not only occurs in steel and iron, but can also be found in concrete, wood, plastics as well as in light and heavy metals. The causes are varied, e. g. humidity (water), oxygen (air), chlorides (maritime atmosphere), sulfates and nitric oxides (industrial atmosphere) as well as bacteria.

The specialized Carapax products are used to tackle all of these challenges, and have been for decades with proven worldwide success.