Corrosion is the process of destruction of metal during its physical and chemical and chemical interaction with the environment. - in case of rain, snowfall, changes temperature, a water film forms on the external and internal surfaces of the body (condensate).If it is contaminated with acids and alkalis contained in the air, or salt sprinkled on roads in winter produces an electrolyte; - in metal after stamping and welding, areas with a changed structure appear. Heterogeneity, as well as micro-inclusions of slag and small defects provoke the occurrence of galvanic steam, that is, electrochemical corrosion in steel body parts. She especially intense at relative air humidity of more than 60% and in large cities with polluted atmosphere.
