Effect of NaF and CaO/SiO2 on the hydrogen dissolution in the CaO-SiO2-FeOt based flux system

Sung Hoon Chung; Jun Yong Park; Seo Jung Park; Woong Seong Chang; Il Sohn

doi:10.2355/isijinternational.53.27

Effect of NaF and CaO/SiO₂ on the hydrogen dissolution in the CaO-SiO₂-FeOt based flux system

Sung Hoon Chung, Jun Yong Park, Seo Jung Park, Woong Seong Chang, Il Sohn

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

The compositional effect of NaF and CaO/SiO₂ on the hydrogen solubility in the NaF-CaO-SiO₂-FeOt welding flux system at 1 823 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 asquenched 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.

Original language	English
Pages (from-to)	27-33
Number of pages	7
Journal	ISIJ International
Volume	53
Issue number	1
DOIs	https://doi.org/10.2355/isijinternational.53.27
Publication status	Published - 2013

All Science Journal Classification (ASJC) codes

Mechanics of Materials
Mechanical Engineering
Metals and Alloys
Materials Chemistry

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title = "Effect of NaF and CaO/SiO2 on the hydrogen dissolution in the CaO-SiO2-FeOt based flux system",

abstract = "The compositional effect of NaF and CaO/SiO2 on the hydrogen solubility in the NaF-CaO-SiO2-FeOt welding flux system at 1 823 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 asquenched 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.",

author = "Chung, {Sung Hoon} and Park, {Jun Yong} and Park, {Seo Jung} and Chang, {Woong Seong} and Il Sohn",

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AU - Chung, Sung Hoon

AU - Park, Jun Yong

AU - Park, Seo Jung

AU - Chang, Woong Seong

AU - Sohn, Il

PY - 2013

Y1 - 2013

N2 - The compositional effect of NaF and CaO/SiO2 on the hydrogen solubility in the NaF-CaO-SiO2-FeOt welding flux system at 1 823 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 asquenched 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.

AB - The compositional effect of NaF and CaO/SiO2 on the hydrogen solubility in the NaF-CaO-SiO2-FeOt welding flux system at 1 823 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 asquenched 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.

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Effect of NaF and CaO/SiO₂ on the hydrogen dissolution in the CaO-SiO₂-FeOt based flux system

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