Effect Of Hydrogen Peroxide Concentration On Surface Properties Of Titanium And Co-Cr Alloys

ObjectThe effect of hydrogen peroxide on the surface morphology of pure titanium and cobalt chromium alloy was investigated.Materials and methods1.26 pure titanium and 26 cobalt-chromium alloy castings were randomly selected from the required castings,the castings were divided into four groups,which were composed of Owt%,3.6wt%,10wt%,and 30wt%,respectively,1000 ml of hydrogen peroxide solution.2.The four groups of castings were randomly put into four concentration solutions,surface roughness and surface morphology of titanium and Co-Cr alloys were evaluated by surface profiler and scanning electron microscopy after being immersed in different concentrations of H2O2 for 112 h.Surface corrosion products of titanium and Co-Cr alloys were analyzed by energy dispersive spectrometer after being immersed in 0%and 30%H2O2.3.Data were imported and analyzed by SPSS 19(a =0.05).ResultsThe order of increasing surface roughness of titanium and Co-Cr alloys afterbeing immersed in different concentrations of H2O2 was 0<3.6%<10%<30%.As the concentration of hydrogen peroxide increased,there are different degrees of different diameters and uneven circles on the surface..Among them,the corrosion was most obvious in the 30wt%hydrogen peroxide immersion group.In addition,after immersion of Owt%and 30wt%hydrogen peroxide,pure titanium and cobalt chromium alloy surfaces were detected with metal body elements,and the surface oxides were mainly TiO2 and CoO.Compared with Owt%hydrogen peroxide,the content of Ti and Co elements on pure titanium and cobalt chromium alloy was significantly reduced after soaking in 30wt%hydrogen peroxide.ConclusionsWith the increase of hydrogen peroxide concentration,the surface roughness of pure titanium and Co-Cr alloy increased,the surface morphology had different degrees of corrosion,the surface corrosion product composition changed,and the degree of oxidation decreased.