Application of Linear Polarization Techniques to the Study of Carbon Steel Corrosion in Dilute Ammonium Nitrate Solutions and Irrigation Groundwaters

摘要

Linear polarization measurements were used to predict corrosion rates for low carbon 1018 steel, a material commonly used in irrigation structures and electrical components. Corrosivity was determined as a function of ammonium nitrate which is commonly distributed to fields through irrigation systems. Both dilute ammonium nitrate solutions and corrosive groundwater field samples from wells in central Nebraska were tested. No ammonium nitrate was added to the field samples. Dual potentiostat systems, a PAR system with a Corning test cell for anodic polarization and an Aardvark system with a modified test cell for linear polarization were used. Corrosion rate data were based on 1018 steel weight change as a function of time and ammonium nitrate concentration.