Ni-Zn 合金電気めつき浴濃度のオンライン分析計

概要

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Ni-Zn electroplated steel shows good corrosion resistance. It is important in the production of the electroplated steel to control the concentration of Ni^<2+> and Zn^<2+> in plating bath. An on-line analysis instrument by fluorescent X-ray analysis was developed for the process control. (1) The analyzer consists of sampling-line and X-ray analysis instrument. The plating solution is fed to the X-ray analysis instrument through sampling-line from plating trays. These operations are done fully automatically. (2) Fluorescent X-ray analysis system with energy dispersive method is used. It is necessary to correct the concentration of SO_4^<2-> and Fe^<2+> in determination of the concentration of Ni^<2+> and Zn^<2+>. Measuring of fluorescent X-ray of S is easy in the air by the analysis system. (3) For X-ray source, W target is used for excitation of Ni, Zn, and Fe fluorescent X-ray, and Cr target for S fluorescent X-ray, respectively. (4) The analytical accuracy in on-line analysis was 0.77g/l and 0.48g/l for Ni^<2+> and Zn^<2+>, respectively. The time required for one cycle analysis is eight minutes. (5) This analyzer has been running for about two years without any trouble.
社団法人日本鉄鋼協会の論文
1983-09-01