耐熱合金の発光分光分析

概要

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Cobalt-based heat-resisting alloys are spectrochemically analyzed in two ways: ingots are sparked directly by point to plane method and solution-dissolved samples are excited by rotating electrode.<BR>The first method gives rise to large errors due to surface constitution of the metal, but if homoge-neous line pairs are chosen for the analysis and if the excitation condition is such as to make the samples vapourize smoothly, acceptable precision (2-5%) can be expected for some elements.<BR>The second method, the solution method with rotating disk electrode, can be used regardless of the size, shape or history of the sample, besides, it provides ease of standard sample preparation.Anal-ytical results show good agreements with those of chemical analysis, but reproducibillity variss by elements and their concentration: it was 1.22% for Cr and 24.2% for Ni.Main error in this method arises from the spectral intensity being affected by acid concentration and difference of electrode porosity.<BR>The methods dealt with in this paper seem to be applicable to routine analysis of any heat-resiting alloy.
社団法人日本分光学会の論文