Behavior of pure gallium in water and various saline solutions

Dental Materials Journal
N HorasawaT Okabe

Abstract

This study investigated the chemical stability of pure gallium in water and saline solutions in order to obtain fundamental knowledge about the corrosion mechanism of gallium-based alloys. A pure gallium plate (99.999%) was suspended in 50 mL of deionized water, 0.01%, 0.1% or 1% NaCl solution at 24 +/- 2 degrees C for 1, 7, or 28 days. The amounts of gallium released into the solutions were determined by atomic absorption spectrophotometry. The surfaces of the specimens were examined after immersion by x-ray diffractometry (XRD) and x-ray photoelectron spectroscopy (XPS). In the solutions containing 0.1% or more NaCl, the release of gallium ions into the solution was lowered when compared to deionized water after 28-day immersion. Gallium oxide monohydroxide was found by XRD on the specimens immersed in deionized water after 28-day immersion. XPS indicated the formation of gallium oxide/hydroxide on the specimens immersed in water or 0.01% NaCl solution. The chemical stability of pure solid gallium was strongly affected by the presence of Cl- ions in the aqueous solution.

Citations

Mar 26, 2015·ACS Applied Materials & Interfaces·Sung Hun JinJohn A Rogers
Oct 17, 1998·Australian Dental Journal·G C TownsendP M Bartold
Jun 6, 2017·Chemical Science·Yiliang LinMichael D Dickey
Oct 23, 2020·Langmuir : the ACS Journal of Surfaces and Colloids·Megan A CreightonChristopher E Tabor
Aug 14, 2019·Langmuir : the ACS Journal of Surfaces and Colloids·Alan R JacobLilian C Hsiao

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