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摘要:以原子比為3﹕1的Fe粉和Si粉球磨20 h后加入一定量的Cu,在(1000±30)℃,20 MPa的壓力下通過熱壓燒結(jié)的方法制備了致密的Fe3Si-Cu復(fù)合材料。通過浸泡腐蝕和電化學(xué)腐蝕兩種方法討論了加入不同質(zhì)量分數(shù)Cu(5%,10%)的Fe3Si-Cu復(fù)合材料在NaOH溶液中的腐蝕行為。結(jié)果表明,加入5%Cu的復(fù)合材料具有更好的耐腐蝕性能。Fe3Si-5%Cu的浸泡腐蝕速率要小,腐蝕的要輕一些;Fe3Si-5%Cu 和Fe3Si-10%Cu兩種材料在不同摩爾濃度的NaOH溶液中的極化曲線都出現(xiàn)了鈍化,有寬泛的鈍化區(qū)域,明顯的鈍化平臺,兩種材料在不同摩爾濃度的NaOH溶液中的腐蝕是一種均勻的全面腐蝕,沒有出現(xiàn)點蝕現(xiàn)象。比較極化曲線的特征值,F(xiàn)e3Si-5%Cu在0.7 mol/l的NaOH溶液中的自腐蝕電位更正,自腐蝕電流小,并且最先進入鈍化區(qū),在鈍化區(qū)域,維鈍電流也小。 關(guān)鍵詞:球磨;熱壓燒結(jié)Fe3Si-Cu;Cu含量;浸泡腐蝕;電化學(xué)腐蝕 |
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以原子比為3﹕1的Fe粉和Si粉球磨20 h后加入一定量的Cu,在(1000±30)℃,20 MPa的壓力下通過熱壓燒結(jié)的方法制備了致密的Fe3Si-Cu復(fù)合材料。 With a Fe to S atomic ratio of 3, the mixture of the powders was ball ground for 20 h before adding a certain amount of Cu. Then dense Fe3Si-Cu composite material was prepared by hot-pressing of the resultant mixture under 20 MPa and (1000±30)℃. |
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abstract: With an atomic ratio of Fe/S=3,the mixture of the powders was ball milled for 20 h before adding some Cu.We have prepared dense Fe3Si-Cu composite material by the method of Hot-pressing Sinter-roasting under 20 MPa and (1000±30)℃.Also we discussed the corrosion behavior of Fe3Si-Cu composite material with different concentrations of Cu(5%,10%)in NaOH solution by two methods of static immersing corrosion and electrochemical corrosion.It turned out that the composite material with 5%Cu had better corrosion resistant.The speed of static immersing corrosion of Fe3Si-5%Cu was less,the extent of corrosion was also less.The polarization curves of Fe3Si-5%Cu and Fe3Si-10%Cu composite material appeared passivation in different molar concentrations of NaOH solution,and there was a broad area of passivation and apparently inactive platform.The corrosion of the two kinds of composite material was evenly rounded corrosion in different molar concentrations of NaOH solution.There was no pitting phenomenon appearing.Compared with characteristic values of the polarization curves,corrosion potential of Fe3Si-5%Cu revised in 0.7 mol/l of NaOH solution,its electric current of corrosion potential is small,and it went to area of passivation first .In area of passivation,maintaining passivity current was also small. keyword:ball mill,F(xiàn)e3Si-Cu by Hot-pressing Sinter-roasting,Cu content,static immersing corrosion,electrochemical corrosion |
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