To investigate the impact of different rolling temperatures on the corrosion performance of low-density steel in marine environments,a self-designed Fe-30Mn-10Al-1.57C-0.3Si-0.6Ti low density steel was used as the research object.It was hot-rolled at different temperatures and comparative material of 40Cr was set up.The corro-sion resistance of low-density steel was studied through testing methods such as full immersion weight loss test,po-tentiodynamic polarization curve,SEM and XPS analysis.The results show that as the rolling temperature increa-ses,the weight loss of low-density steel decreases,the Ecorr increases from-0.691 V to-0.392 V,and the Icorr decreases from 10-5.533 A/cm2 to 10-6.780 A/cm2.It indicates that its corrosion resistance increases with the increase of rolling temperature.This is mainly due to the presence of Cr and Al in low-density steel,which leads to the for-mation of an oxide film on sample surface,preventing the corrosion of material matrix by corrosive medium.In addi-tion,the low-density steel sample after hot rolling deformation treatment results in decrease in galvanic reaction due to decrease in ferrite content.This article enriches the relevant research on Fe-Mn-Al-C low density steel and pro-vides theoretical basis for the industrial application of low-density steel.
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