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Thermodynamic studies on HF-HNO3-H2O solutions containing iron, chromium and nickel
Date
1992Type
ThesisDepartment
Mining and Metallurgical Engineering
Degree Level
Master's Degree
Degree Name
Metallurgical Engineering
Abstract
The solubility of pure metals of iron, chromium and nickel and alloys of AISI 316 and 416 stainless steels in HF- HNO3-H2O solutions was studied under different acid concentrations. The chemical analysis of the equilibrium solutions and solid was carried out using atomic absorption spectrophotometer (AA), X-ray diffraction and scanning electron microscope (SEM) methods. All experiments were done at 298 K and one atmosphere. The results showed that the solubilities of iron, chromium and nickel increased with increase in concentration of hydrofluoric and nitric acids. The stable solid phases formed in the solution with stainless steels solution were mainly FeFy 3H20. The theoretical solubility of iron, chromium and nickel have been calculated at 4 molality of HNO3 with an assumption of an ideal solution. An excellent agreement between the experimental data and the theoretical data is observed.
Description
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Permanent link
http://hdl.handle.net/11714/1779Subject
solubilitysolubility of iron
pure metals
iron
solubility of chromium
chromium
nickel
solubility of nickel
alloys
solubility of alloys
stainless steel
solubility of stainless steel
chemical analysis
equilibrium solutions
atomic absorption spectrophotometer X-ray diffraction
scanning electron microscope
hydrofluoric acid
nitric acids
stable solid phases
Mackay Science Project
Additional Information
Committee Member | Smith, Ross W.; Hus, Liang-Chi |
---|---|
Rights | In Copyright(All Rights Reserved) |
Rights Holder | Author(s) |
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