In order to study the effect of intermaetallics on the corrosion behaviour of 7A52 aluminum alloy, the alloy was characterized by means of SEM-EDS and scanning Kelvin probe force microscopy（SKPFM）. The experimental ...In order to study the effect of intermaetallics on the corrosion behaviour of 7A52 aluminum alloy, the alloy was characterized by means of SEM-EDS and scanning Kelvin probe force microscopy（SKPFM）. The experimental results indicate that there are two different intermetallics：A1-Mn-Fe and Mg2Si. Both intermetallics exhibite the negative volta potential relative to the matrix indicating an anodic behaviour. Hereby, they are easy to be dissolved and corroded under the erosive environment, and there become the corrosion initiation sites. The A1-Mn-Fe intermetallics show stronger anodic behaviour than those of Mg2Si intermetalics. It means that A1-Mn-Fe intermetalics are easier to be corroded.展开更多
A direct spectrophotometric method for the determination of micro copper in aluminum alloy using PAN as chromogenic reagent has been proposed. In the presence of CTMAB,a stable red complex between Cu(Ⅱ) and PAN is fo...A direct spectrophotometric method for the determination of micro copper in aluminum alloy using PAN as chromogenic reagent has been proposed. In the presence of CTMAB,a stable red complex between Cu(Ⅱ) and PAN is formed in the buffer solution of pH1.3～4.5.The apparent molar absorptivity is 2.09×10 4L·mol -1 ·cm -1 at 558nm.The RSD is 0.8%(n=4).Beer’s law is obeyed for 0～80μg/25ml of Cu(Ⅱ).The linear correlation coefficient is 0.9998.展开更多
基金Funded by the National Natural Science Foundation of China(No.50801066)
文摘In order to study the effect of intermaetallics on the corrosion behaviour of 7A52 aluminum alloy, the alloy was characterized by means of SEM-EDS and scanning Kelvin probe force microscopy（SKPFM）. The experimental results indicate that there are two different intermetallics：A1-Mn-Fe and Mg2Si. Both intermetallics exhibite the negative volta potential relative to the matrix indicating an anodic behaviour. Hereby, they are easy to be dissolved and corroded under the erosive environment, and there become the corrosion initiation sites. The A1-Mn-Fe intermetallics show stronger anodic behaviour than those of Mg2Si intermetalics. It means that A1-Mn-Fe intermetalics are easier to be corroded.
文摘A direct spectrophotometric method for the determination of micro copper in aluminum alloy using PAN as chromogenic reagent has been proposed. In the presence of CTMAB,a stable red complex between Cu(Ⅱ) and PAN is formed in the buffer solution of pH1.3～4.5.The apparent molar absorptivity is 2.09×10 4L·mol -1 ·cm -1 at 558nm.The RSD is 0.8%(n=4).Beer’s law is obeyed for 0～80μg/25ml of Cu(Ⅱ).The linear correlation coefficient is 0.9998.
