Cu-30Ni-xRE(x=0–0.213 wt.%) alloy was prepared by adding rare earths(RE) in melted Cu-30Ni alloy using metal mould casting method.The effects of RE on corrosion resistance of the alloy in simulated seawater were inve...Cu-30Ni-xRE(x=0–0.213 wt.%) alloy was prepared by adding rare earths(RE) in melted Cu-30Ni alloy using metal mould casting method.The effects of RE on corrosion resistance of the alloy in simulated seawater were investigated using optical microscope,scanning electronic microscope with energy-dispersive spectrometer and electrochemical measurement system.The results showed that the corrosion resistance of Cu-30Ni alloy was greatly improved by adding proper amount of RE,whereas excess addition of RE worsened ...展开更多
Some azoles were tested such as 3-amino-1,2,4-triazole (ATA), 3-4’-bitriazole -1,2,4 (BiTA)and 2-Mercaptobenzimidazole (MBI) against Cu-30Ni alloy corrosion in 3%NaCl polluted by ammonia using potentiodynamic measure...Some azoles were tested such as 3-amino-1,2,4-triazole (ATA), 3-4’-bitriazole -1,2,4 (BiTA)and 2-Mercaptobenzimidazole (MBI) against Cu-30Ni alloy corrosion in 3%NaCl polluted by ammonia using potentiodynamic measurements and electrochemical impedance spectroscopy and non-electrochemical techniques (scanning Electron Microscopy (SEM)) studied surface morphology has been used to characterize electrode surface. This study permitted to follow the evolution of the inhibitory effect of some azoles, on Cu-30Ni alloy corrosion in 3%NaCl polluted by ammonia and indicate that the tested inhibitors act as a good mixed-type inhibitor retarding the anodic and cathodic reactions. An increase of the inhibitors concentration leads to a decrease of corrosion rate and inhibition efficiency increase.展开更多
After solutionized, 70Cu 30Ni alloy was deformed in different degrees and then exposed both in NaCl solution and in seawater. The results show that with the increase of deformation, the E c and R p -1 ...After solutionized, 70Cu 30Ni alloy was deformed in different degrees and then exposed both in NaCl solution and in seawater. The results show that with the increase of deformation, the E c and R p -1 of 70Cu 30Ni alloy decrease more quickly and fluctuate less when the exposure time increases, and the corrosion product films contain more nickel and less chloride because the distribution of dislocations tends to be homogeneous.展开更多
基金Projects(YKJ201008,KXJ08135)supported by Scientific Research Startup Foundation for Introducing Talents of Nanjing Institute of Technology,ChinaProject(JHB2011-25)supported by the Industrialization of Scientific Research Promotion Projects of Colleges and Universities in Jiangsu Province,ChinaProject(CKJB201206)supported by Innovation Foundation of Nanjing Institute of Technology,China
基金Project Financially supported by Major State Basic Research Development Program of China (2007CB616903)
文摘Cu-30Ni-xRE(x=0–0.213 wt.%) alloy was prepared by adding rare earths(RE) in melted Cu-30Ni alloy using metal mould casting method.The effects of RE on corrosion resistance of the alloy in simulated seawater were investigated using optical microscope,scanning electronic microscope with energy-dispersive spectrometer and electrochemical measurement system.The results showed that the corrosion resistance of Cu-30Ni alloy was greatly improved by adding proper amount of RE,whereas excess addition of RE worsened ...
文摘Some azoles were tested such as 3-amino-1,2,4-triazole (ATA), 3-4’-bitriazole -1,2,4 (BiTA)and 2-Mercaptobenzimidazole (MBI) against Cu-30Ni alloy corrosion in 3%NaCl polluted by ammonia using potentiodynamic measurements and electrochemical impedance spectroscopy and non-electrochemical techniques (scanning Electron Microscopy (SEM)) studied surface morphology has been used to characterize electrode surface. This study permitted to follow the evolution of the inhibitory effect of some azoles, on Cu-30Ni alloy corrosion in 3%NaCl polluted by ammonia and indicate that the tested inhibitors act as a good mixed-type inhibitor retarding the anodic and cathodic reactions. An increase of the inhibitors concentration leads to a decrease of corrosion rate and inhibition efficiency increase.
文摘After solutionized, 70Cu 30Ni alloy was deformed in different degrees and then exposed both in NaCl solution and in seawater. The results show that with the increase of deformation, the E c and R p -1 of 70Cu 30Ni alloy decrease more quickly and fluctuate less when the exposure time increases, and the corrosion product films contain more nickel and less chloride because the distribution of dislocations tends to be homogeneous.
