Experimental Correlation between Heat Treatment Parameter and Corrosion Behavior of 800 Series Ni-Fe Superalloy in H2SO4 Solution

This experiment was carried out to investigate the correlation between heat treatment parameter and corrosion behavior of incoloy 800 super-alloy in H2SO4 solution. Spark plasma sintering (SPS) was used in producing the samples. The produced samples were heat treated at temperatures of 800°c and 10000c and for of 1 and 2 hours at each temperature. Electrochemical studies were carried out in H2SO4 medium, using potentiodynammic anodic polarization techniques. From the results obtained, the heat-treated alloy showed better corrosion resistance than the untreated alloy. Heat treatment temperature and time have great influences on the corrosion behavior and morphology of the alloy. The sample heat treated at 1000°C for 1hour gave a high protection efficiency of 86.29%. It has been established from the result of the experiment that heat treatment can be used to improve the corrosion resistance of the alloy.