Elemental Analysis Protocol Estabilishment Of High Aluminum Zinc-Based Alloy

Material science and technology development puts forward higher demands on the efficiency and accuracy of elemental analysis. Pulsar metal analyzer A30, a new kind of metal analyzers, was developed by scientists to meet the demands. The innovation of the equipment lies on the fact that a novel solid-state atomization technique is adopted. This innovative approach well combined with technologies of glow discharge and catholic spray realizes the direct analysis of solid samples. Compared with the other spectrophotometers, it possesses the advantages of fast analytical speed and high accuracy. During the practical analysis, according to the kind of analyzed alloys, the corresponding analyticalprotocol-- a set of individualized and optimized parameters, isrequired to obtain accurate analytical results.In order to make this analytical approach better meet the demands of scientific research and production, the thesis chooses the high aluminum zinc- based alloy as the research object. A series of the testing standard samples of high aluminum zinc-based alloy are prepared by the melting-casting method with high frequency induction centrifugal furnace.Chemical analysis method, differential scanning caloriety(DSC), and metallographic microstructure comparison are applied to test their homogeneity and uniformity. Chemical analysis method is used to determine the concentrations of Al and Cu of the testing standard samples while the concentration of base element Zn is calculated by the normalization method. The concentration range of Al, Cu and Zn are 24.720 ~ 31.113% , 1.340 ~ 5.710%, and 67.070 ~ 69.570% respectively.The main parameters of analytical protocols include the time and atomization ones. Concretely speaking, time parameter contains Preburn time, Set, and Data acquisition(DAQ) time. Atomization parameter consists of Power control and Vacuum control. Theoretically and practically, the thesis analyzes the effects of Set, Power control and Vacuum control to absorbance, summarizes the general principle of the parameters set, observes and discovers the microstructure picture of samples after solid-state atomization, establishes the protocol-developing procedure, and presents criterions of assessing analytical protocols for the first time. Test analysis shows the efficient ways to decrease the absorbance values of the analyzed elements such as prolonging the time of Set, reducing Voltage control at Power control, and increasing Vacuum control.