Effect of NaF and CaO/SiO2 on the Hydrogen Dissolution in the CaO–SiO2–FeOt Based Flux System
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概要
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The compositional effect of NaF and CaO/SiO2 on the hydrogen solubility in the NaF–CaO–SiO2–FeOt welding flux system at 1823 K is presented. At a CaO/SiO2 of 1.3, higher NaF decreased the hydrogen solubility and at a CaO/SiO2 of 1.5, higher NaF had relatively little effect on the hydrogen solubility in the flux. The hydrogen solubility with CaO/SiO2 showed a parabolic behavior showing a minimum near unit basicity and increasing with higher basicity. FTIR (Fourier transform infra red) and Raman spectroscopy of as-quenched flux samples showed the addition of NaF and higher CaO/SiO2 depolymerized the flux structure. At low and intermediate basicities from 0.9 to 1.3, higher NaF decreased the incorporated hydroxyl sites of Si(OH) and FeO(OH), which correlates well to lower hydrogen values.
著者
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Chang Woong-seong
Research Institute Of Industrial Science & Technology(rist)
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Sohn Il
Department Of Materials Science And Engineering Yonsei University
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Chung Sung
Department Of Anesthesiology And Pain Medicine
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Park Jun-Yong
Department of Materials Science and Engineering, Yonsei University
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Park Seo-Jung
Research Institute of Industrial Science and Technology
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