Nitrate Effect on Degradation Processes of α,(α+β)-brasses in Moroccan Azrou Soil Medium

Usually, nitrates are found naturally in low concentrations in water, but they can also have an artificial origin due to their use as crop fertilizer (mineral and organic fertilizers, animal manure). Excess not absorbed by plants are leached by rain and remains in the soil. In this paper we are going to study the effect of nitrates (NO3-) existence in soil on metal degradation of two series of brass (α and αβ) used as a support fittings which are suitable for connecting domestic service lines. This work aims at specifying the best alloys which are recommended to be used in Moroccan Azrou soil medium. This research paper was applied by using electrochemical impedance spectroscopy (EIS) methods and polarization curves. It was found that EC6 is the most resistant alloy between all brasses in this soil which containing 2 g/L of NO3-. Moreover, we have studied the role and effects of various additional elements which exist in different brasses and they are responsible for increasing the corrosion resistance.