The corrosion behaviors of Fe-Cr alloy under three different pH values solutions with C1- and SO42- were investigated by localized electrochemical impedance spectroscopy （LEIS） measurements and the corrosion product...The corrosion behaviors of Fe-Cr alloy under three different pH values solutions with C1- and SO42- were investigated by localized electrochemical impedance spectroscopy （LEIS） measurements and the corrosion products were analyzed by laser Raman spectrometry. The results show that the high corrosion resistance of Fe-Cr Alloy is attributed to a passive film which is formed more easily when the alloy contains a large quantity of Cr element. However, its corrosion resistance varies in the solutions with different pH values, especially in the initial corrosion. The average impedance values in neutral and alkaline solution are much higher than that in acidic solution because the passive film is more likely to dissolve in the acidic condition. Moreover, the destructive effect of C1- and SO42 ions on the passive film is also demonstrated in corrosion process through the change of the impedance value with the steeping time.展开更多
The rapid degradation of Mg alloy was reduced by incorporating titanate on a fluorine-based anodized layer.The coating shows(i)excellent biomineralization ability,(ii)improved local and periodical corrosion behavior a...The rapid degradation of Mg alloy was reduced by incorporating titanate on a fluorine-based anodized layer.The coating shows(i)excellent biomineralization ability,(ii)improved local and periodical corrosion behavior and(iii)enhanced expression of osteogenic factors(Runx2,Col 1,OCN and OPN)along with(iv)the antibacterial property.The fluoride and magnesium ions dissolution from the anodized layer is responsible for the better expression of osteogenic factors and antibacterial behavior.The preparation of the titanate incorporated anodized Mg alloy(Ti-AMg)is a facile solution to overcome the implant-associated bacterial infections with required biological functions including progression of bone ingrowth and biocompatibility.展开更多
基金National Natural Science Foundation of China (No. 50871021)
文摘The corrosion behaviors of Fe-Cr alloy under three different pH values solutions with C1- and SO42- were investigated by localized electrochemical impedance spectroscopy （LEIS） measurements and the corrosion products were analyzed by laser Raman spectrometry. The results show that the high corrosion resistance of Fe-Cr Alloy is attributed to a passive film which is formed more easily when the alloy contains a large quantity of Cr element. However, its corrosion resistance varies in the solutions with different pH values, especially in the initial corrosion. The average impedance values in neutral and alkaline solution are much higher than that in acidic solution because the passive film is more likely to dissolve in the acidic condition. Moreover, the destructive effect of C1- and SO42 ions on the passive film is also demonstrated in corrosion process through the change of the impedance value with the steeping time.
基金Project(52164021) supported by the National Natural Science Foundation of ChinaProject(2019FB078) supported by the Natural Science Foundation of Yunnan Province,ChinaProject(CCC21321119A) supported by the Faculty of Land Resource Engineering,China。
基金One of the authors K.Saranya is thankful to the Department of Science and Technology(DST),New Delhi,India for financial assistance under women scientist scheme(WOS-A)(Ref.No:SR/WOS-A/ET-17/2017).
文摘The rapid degradation of Mg alloy was reduced by incorporating titanate on a fluorine-based anodized layer.The coating shows(i)excellent biomineralization ability,(ii)improved local and periodical corrosion behavior and(iii)enhanced expression of osteogenic factors(Runx2,Col 1,OCN and OPN)along with(iv)the antibacterial property.The fluoride and magnesium ions dissolution from the anodized layer is responsible for the better expression of osteogenic factors and antibacterial behavior.The preparation of the titanate incorporated anodized Mg alloy(Ti-AMg)is a facile solution to overcome the implant-associated bacterial infections with required biological functions including progression of bone ingrowth and biocompatibility.
