2. Biofilm

As described by Haras , the formation of a bacterial biofilm is a complex phenomenon involving the medium, the bacteria and the colonized surfaces. It is the result of the physico-chemical properties existing between the surfaces of the material and the micro-organisms, as well as their response to adhesion and increased cell density.

Any metallic material immersed in a non-sterile environment is more or less rapidly covered by a film of organic and then biological matter.

Biofilm is made up not only of water and bacteria, but also of organic substances (macromolecules: polysaccharides,...