Atmosphere | Characteristics |
Industrial | Emissions from heavy industry, concentrations of chloride, phosphate and nitrate and formation of sulfur dioxide from combustion. |
Urban | The most common pollutants are NOx (NO + NO2) and SOX from combustion of fossil material and product of anthrononenic mobile sources. |
Marine | Existence of high concentrations of chlorides with values above 15 mg/m2-dia NaCl. The corrosivity can be strengthened by the existence of industries in the area, together with temperature, relalive humidity and wind direction. |
Rural | It is the presence of pollutants from fertilizers, as well as decomposition of organic matter, result in a the presence of ammonium ions, nitrates. |