Materials

Forms of corrosion

Biodeterioration of material concerns all sectors of the industry where material are exposed to wet environments.
If corrosion or biocorrosion immediately evokes metallic materials, stainless or carbon steel, cupro-nickel alloys, one must not forget concrete, resin and other composite material

Form of corrosions	Causes	Reasons
Generalised	Electro-chemical corrosion : anodic reaction of oxidation of metal and cathodic reaction of reduction of dissolved oxygen	Oxygène et oxydants Humidité Pollution température
Localised	Local acidification, presence of bacterial, galvanic coupling, localised fracture of protecting film under the effect of local chemistry or deformations	Oxygen and oxidants Biofilm Chlorides Local pH Mechanical constraints Heterogeneity of materials

Example of a corrosion mechanism induced by sulfate reducing bacteria

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