Development of On-Line Analysis System for Concentration of Chromic Acid in Chromate Treatment Process

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  • クロメート処理浴中クロム酸濃度の自動分析システムの開発
  • クロメート ショリヨクチュウ クロムサン ノウド ノ ジドウ ブンセキ システ

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Abstract

An application of electric conductivity method was investigated in order to develop an on-line analysis system of the concentration of chromic acid in three kinds of chromate treatment baths of the galvernizing process. As the results, it was found that the additions such as colloidal silica, amine, and stynated polymer gave little influence to electric conductivity, which varied however by temperature in the chromate treatment bath. Reasonable correlation was recognized between the concentration of CrO3 and electric conductivity for the process operation data by correcting the effect of temperature. An example of automatic control system suitable to apply to practical process was proposed. The proposed system consists of electric conductivity meter, liquid-level meter, electromagnetic vales and so on.

Journal

  • Tetsu-to-Hagane

    Tetsu-to-Hagane 65 (10), 1614-1619, 1979

    The Iron and Steel Institute of Japan

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