Corrosion Behaviours of Additively Manufactured Nitrided 17-4 PH Steels in Different Environments

In this research work, the corrosion behaviours of additively manufactured nitrided 17-4 PH steels in different environments were experimentally investigated. The influence of nitriding on corrosion resistance of 3.5 wt.% of sodium chloride (NaCl) and 0.5 M of sodium sulphate (Na2SO4) environments was investigated. Results exhibit that the as-built specimens affected more on corrosion in form of pits in both environments. The nitrided 17-4 PH at 580 degrees C produced the best/optimum corrosion resistance property in both environmental conditions. The improved corrosion resistance was obtained due to the presence of homogenous distribution of chromium and iron in the form of nitrides (CrN and Fe3-4N) on the surface along with other compounds.

Automated summary

The corrosion behaviors of additively manufactured nitrided 17-4 PH steels in different environments were studied. The influence of nitriding on corrosion resistance in 3.5 wt.% sodium chloride (NaCl) and 0.5 M sodium sulphate (Na2SO4) environments was investigated. The nitrided 17-4 PH at 580 degrees C showed the best corrosion resistance due to the homogeneous distribution of chromium and iron in the form of nitrides (CrN and Fe3-4N) on the surface along with other compounds.