納米晶Cu-50Ag合金在酸性溶液中腐蝕行為研究
發(fā)布時(shí)間：2018-11-19 13:55
【摘要】：與粉末冶金法(PM)制備的常規(guī)尺寸合金對(duì)比,研究了通過(guò)熱壓液相還原法(LPR)和機(jī)械合金化法(MA)合成的Cu-50Ag合金粉末制備的塊體納米晶Cu-50Ag合金在酸性溶液中的腐蝕行為。結(jié)果表明:在Na_2SO_4溶液中加入H_2SO_4后,3種合金的腐蝕速度均加快。隨著H_2SO_4濃度的增加,PMCu-50Ag和LPRCu-50Ag合金的腐蝕速度均未發(fā)生明顯變化,而MACu-50Ag合金的腐蝕速度則加快。在Na_2SO_4溶液中,3種合金均未出現(xiàn)鈍化現(xiàn)象,隨著H_2SO_4的加入,合金出現(xiàn)了鈍化現(xiàn)象。3種合金的腐蝕速率按PMCu-50Ag,LPRCu-50Ag和MACu-50Ag合金的順序增加,其中LPRCu-50Ag合金的腐蝕速度略大于PMCu-50Ag合金,但明顯小于MACu-50Ag合金。
[Abstract]:Compared with conventional size alloys prepared by powder metallurgy (PM), The corrosion behavior of bulk nanocrystalline Cu-50Ag alloy prepared by hot pressure liquid phase reduction method (LPR) and mechanical alloying method (MA) in acidic solution was studied. The results show that the corrosion rate of the three alloys accelerates with the addition of H_2SO_4 in Na_2SO_4 solution. With the increase of H_2SO_4 concentration, the corrosion rates of PMCu-50Ag and LPRCu-50Ag alloys did not change obviously, while the corrosion rates of MACu-50Ag alloys increased. In Na_2SO_4 solution, there was no passivation of the three alloys. With the addition of H_2SO_4, the passivation of the three alloys was observed. The corrosion rates of the three alloys increased in the order of PMCu-50Ag,LPRCu-50Ag and MACu-50Ag alloys. The corrosion rate of LPRCu-50Ag alloy is slightly higher than that of PMCu-50Ag alloy, but obviously smaller than that of MACu-50Ag alloy.
【作者單位】： 沈陽(yáng)師范大學(xué);
【基金】：國(guó)家自然科學(xué)基金(51271127) 遼寧省高等學(xué)校優(yōu)秀人才支持計(jì)劃(LR2011032)
【分類號(hào)】：TG146.11
本文編號(hào)：2342507
[Abstract]:Compared with conventional size alloys prepared by powder metallurgy (PM), The corrosion behavior of bulk nanocrystalline Cu-50Ag alloy prepared by hot pressure liquid phase reduction method (LPR) and mechanical alloying method (MA) in acidic solution was studied. The results show that the corrosion rate of the three alloys accelerates with the addition of H_2SO_4 in Na_2SO_4 solution. With the increase of H_2SO_4 concentration, the corrosion rates of PMCu-50Ag and LPRCu-50Ag alloys did not change obviously, while the corrosion rates of MACu-50Ag alloys increased. In Na_2SO_4 solution, there was no passivation of the three alloys. With the addition of H_2SO_4, the passivation of the three alloys was observed. The corrosion rates of the three alloys increased in the order of PMCu-50Ag,LPRCu-50Ag and MACu-50Ag alloys. The corrosion rate of LPRCu-50Ag alloy is slightly higher than that of PMCu-50Ag alloy, but obviously smaller than that of MACu-50Ag alloy.
【作者單位】： 沈陽(yáng)師范大學(xué);
【基金】：國(guó)家自然科學(xué)基金(51271127) 遼寧省高等學(xué)校優(yōu)秀人才支持計(jì)劃(LR2011032)
【分類號(hào)】：TG146.11
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