Corrosion is a natural phenomenon that happens when minerals react chemically with their surroundings. It may cause significant material and human losses. Seawater is the most challenging and aggresive corrosion-causing medium out of these factors, which also include humidity, temperature, acid rain, etc. In our study, we prepared a medium similar to seawater that contains 3.5% sodium chloride, then we concentrated on how the temperature range of 10 to 45 ºC affected the corrosion mechanism of an iron-manganese alloy (Fe-Mn). The methods employed in this work were Tafel polarization curves and electrochemical impedance spectroscopy (EIS). The surface morphology of the Fe-Mn alloy surface was examined by scanning electron microscope (SEM).The results reveal that the open circuit potential (OCP) of Fe-Mn alloy shifted negatively with increasing temperature, suggesting the start of corrosion processes. The corrosion potential degenerates more quickly at higher temperatures, which is associated to a faster corrosion rate. The EIS indicated that the corrosion resistance of Fe-Mn alloy decreased at high temperatures, and tafel curves demonstrated that the corrosion current density Jcorr increased in high temperatures. The surface of the Fe-Mn alloy was covered by a huge number of the accumulated corrosion products as the temperature climbed, the roughness of the steel increased, and the volume and size of corrosion products dramatically increased.
Citation
Sarra Merabet ,
Cheikh MOKRANI ,
ADMIN Admin ,
,(2023), The influence of temperature on the corrosion of the special alloy Fe-Mn in a saline media,THE 3rd NATIONAL CONFERENCE ON APPLIED PHYSICS & CHEMISTRY,Laghouat
