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Title: Corrosion properties of Ca65-xMg17.5Zn17.5+x (x = 0, 2.5, 5) alloys
Authors: Babilas, R.
Wojciechowski, P.
Bajorek, Anna
Sakiewicz, P.
Cesarz-Andraczke, K.
Keywords: Ca-based alloys; Corrosion; Hydrogen evaluation; X-ray photoelectron spectroscopy
Issue Date: 2019
Citation: Archives of Metallurgy and Materials, 2019, no. 3, s. 1033-1040
Abstract: The aim of the paper is to study the effect of zinc addition on the corrosion behavior of Ca65–xMg17.5Zn17.5+x (x = 0, 2.5, 5 at.%) alloys in simulated physiological fluids at 37°C. The electrochemical measurements allowed to determine a corrosion potential, which showed a positive shift from –1.60 V for Ca65Mg17.5Zn17.5 alloy to –1.58 V for Ca60Mg17.5Zn22.5 alloy, adequately. The more significant decrease of hydrogen evolution was noticed for Ca60Mg17.5Zn22.5 alloy (22.4 ml/cm2) than for Ca62.5Mg17.5Zn20 and Ca65Mg17.5Zn17.5 samples (29.9 ml/cm2 and 46.4 ml/cm2), consequently. The corrosion products after immersion tests in Ringer’s solution during 1 h were identified by X-ray diffraction and X-ray photoelectron spectroscopy as calcium, magnesium oxides, carbonates, hydroxides and calcium hydrate.
DOI: 10.24425/amm.2019.129492
ISSN: 1733-3490
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