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Corrosion behavior of AZ91 magnesium alloy in dilute NaCl solutions

Wang, Lei / Zhang, Bo-Ping / Shinohara, Tadashi

AbstractThe corrosion behavior of AZ91 magnesium alloy in dilute NaCl solutions was studied using electrochemical measurements, whereby a corrosion map in terms of electrode potential and chloride concentration [Cl⁻] was obtained. AZ91 alloy exhibited the corrosion and passivation zones in dilute NaCl solutions. The passivation zone became narrow with increasing [Cl⁻]. The values of open-circuit potential were in the passivation zone when the [Cl⁻] was less than 0.5mol/L. XRD patterns showed the presence of the Mg(OH)2, Mg5(CO3)4(OH)2·8H2O and MgO phases in the corrosion product, whereas the latter two phases found in the passive film.

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Corrosion behavior of AZ91 magnesium alloy in dilute NaCl solutions

Wang, Lei / Zhang, Bo-Ping / Shinohara, Tadashi

AbstractThe corrosion behavior of AZ91 magnesium alloy in dilute NaCl solutions was studied using electrochemical measurements, whereby a corrosion map in terms of electrode potential and chloride concentration [Cl⁻] was obtained. AZ91 alloy exhibited the corrosion and passivation zones in dilute NaCl solutions. The passivation zone became narrow with increasing [Cl⁻]. The values of open-circuit potential were in the passivation zone when the [Cl⁻] was less than 0.5mol/L. XRD patterns showed the presence of the Mg(OH)2, Mg5(CO3)4(OH)2·8H2O and MgO phases in the corrosion product, whereas the latter two phases found in the passive film.

Corrosion behavior of AZ91 magnesium alloy in dilute NaCl solutions

Wang, Lei / Zhang, Bo-Ping / Shinohara, Tadashi

AbstractThe corrosion behavior of AZ91 magnesium alloy in dilute NaCl solutions was studied using electrochemical measurements, whereby a corrosion map in terms of electrode potential and chloride concentration [Cl⁻] was obtained. AZ91 alloy exhibited the corrosion and passivation zones in dilute NaCl solutions. The passivation zone became narrow with increasing [Cl⁻]. The values of open-circuit potential were in the passivation zone when the [Cl⁻] was less than 0.5mol/L. XRD patterns showed the presence of the Mg(OH)2, Mg5(CO3)4(OH)2·8H2O and MgO phases in the corrosion product, whereas the latter two phases found in the passive film.

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Title:

Corrosion behavior of AZ91 magnesium alloy in dilute NaCl solutions

Contributors:

Wang, Lei (author) / Zhang, Bo-Ping (author) / Shinohara, Tadashi (author)

Publication date:

2009-07-25

Size:

7 pages

ISSN:

DOI:

https://doi.org/10.1016/j.matdes.2009.07.049

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

AZ91 magnesium alloy , Dilute NaCl solutions , Corrosion map

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