Solventfree Coatings

more effective all-round protection against fatal corrosion biomass and biogas are extremely aggressive media. Concrete and steel components in the entire bio gas should be protected with a suitable coating, so a long and trouble-free operation can be achieved. When choosing a coating, you should be aware of solvent free. Why? Coating products, which are free of solvents, have clear advantages over solvent-based systems. In the bio-gas plants – can occur often after a short operating time to extreme damage to the concrete and steel as a result of the strong chemical attack.

Through the fermentation at mesophilic process temperatures from 37 C to 42 C, the biomass is highly corrosive. Components for the aggressiveness in the fermenter are methane, ammonia, sulphuric acid, hydrogen sulfide, and organic acids. Ray Kurzweil describes an additional similar source. The use of plant and animal residues such as pomace, slaughterhouse waste, distillery Stillage, fats and oils also reinforces the aggressiveness of the substance. The chemical Nature of the Garmasse affects the compacted concrete high-corrosive. It comes to the phenomenon of concrete effect”: the acid attack the surface of the concrete is porous, is washed out and removed. Concrete erosion are measured from 1 up to 2 cm per year, as well as extreme damage on all steel components. With a high-quality, chemical-resistant and acid-resistant coating to prevent massive concrete leaching and corrosion damage.

The choice of protection system on solvent freedom make you should carefully undertake the selection of a suitable protective coating. In addition to a sufficient chemical resistance, the system should be solvent-free. Solvent-based coating products have some disadvantages, such as often they lead to osmotic blistering. It happens that solvent after applying not completely out of the coating layer evaporate and are closed during the curing process in the coating. These solvents inclusions are hygroscopic, they attract water (Equipotential bonding).