Effect Of Rare-earth Ce On The Corrosion Resistance And Antibacterial Property Of0Cr17Mo Stainless Steel

0Cr17Mo ferritic stainless steel has been widely used in society because of its highcorrosion resistance and other good performances. But with the development of thetimes, people have new requirements on the performance of the stainless steel, in recentyears, in order to meet people’s need, countries all over the world are studying how toimprove the microstructures and properties of the stainless steel, rare earth has attractedwidespread attention because of it can purify liquid steel, optimize the grain boundaries,improve as-cast microstructures. Because rare earth elements have little poison and haveantibacterial properties, so how to make the stainless steel both have outstandingcorrosion resistance performance and antimicrobial property have come true. So inorder to adapt to the needs of new times, the influences of rare earth elements on theproperties of0Cr17Mo ferritic stainless steel were studied in this paper.In this paper experiments,0Cr17Mo ferritic stainless steel was prepared to0Cr17MoCe stainless steels that with different content of rare earth Ce. The influencesof rare earth elements on the microstructures, corrosion resistance and antibacterialproperty of0Cr17Mo ferritic stainless steel were studied and the action mechanism wasalso analyzed in ferritic stainless steel.The experiment data show that: rare earth Ce can improve the corrosion resistance,purify liquid steel, optimize the grain boundaries, reduce corrosion source, refine grainsize and improve the hardness, and make the inclusions in the steel transform fromirregular shape into axiolith and sphere; But the corrosion resistance of the experimentof steel is not increasing with the increasing of rare earth in this lab, when the solidsolution content of rare earth Ce is0.0021%, the grains are the finest, organizationhardness is the highest and corrosion resistance is the best. But when Ce content is0.24%, the hardness and corrosion resistance of the experiment steel become poor.In this article, the antimicrobial property are determined by the bacteria growthcurve method in the experiment. The results show that when the solid solution contentof rare earth Ce is0.24%, the antimicrobial property is optimal. But when the contentof Ce is over adding, it can cause microstructures, corrosion resistance and processingproperties become worse, so considering the comprehensive performance of steel, thecontent of rare earth Ce should not be more than0.24%.