CORROSION INHIBITORS FOR DESULFURIZATION UNITS

To restrain the sulfide stress corrosion cracking of carbon steel in desulfurization unit,imidazoline and methyldiethanolamine(MDEA) were selected as inhibitors by weight-loess tests and polarization curve measurements.These two inhibitors have made good effects to restrain corrosion and hydrogen blistering,And tensile tests were used to evaluate the performance of the two corrosion inhibitors in H2S saturated water.The results show that the two inhibitors can all decrease the susceptibility to stress corrosion cracking greatly.