Effects of sample orientation on the corrosion of zinc in ammonium sulfate and sodium hydroxide solutions

Abayarathna, Dharma; Hale, Edward B.; O’Keefe, Thomas J.; Wang, Y.-M.; Radovic, D.

doi:10.1016/0010-938x(91)90089-8

Cited by 73 publications

(34 citation statements)

References 11 publications

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“…34 A corrosion study on a hcp Zn single crystal showed that the corrosion resistance of the (0001) basal plane is about 1.4 times that of the (1120) and (1010) planes in 1 M (NH 4 ) 2 SO 4 . 35 For polycrystalline pure Mg, the basal plane (0001) was found to be more corrosion resistant than other planes. 36 Further, for the AZ31 alloy, the corrosion resistance of the rolled surface, mainly comprising of (0001) planes, was higher than that of the cross section, which mainly comprised (1120) and (1010) planes.…”

Section: Discussionmentioning

confidence: 98%

Corrosion Behavior of Pure Magnesium with Low Iron Content in 3.5 wt% NaCl Solution

Yang

Zhou

Curioni

et al. 2015

J. Electrochem. Soc.

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The microstructure and corrosion behavior of pure magnesium, with 25 ppm Fe but a high corrosion rate, have been studied in this work. It was found that Fe-rich particles, containing also Si, distribute non-uniformly in the Mg matrix and they are spaced at a distance of 100-1000 μm. Before the initiation of localized corrosion, Fe-rich particles play a key role in determining the overall corrosion behavior by supporting hydrogen evolution. During corrosion propagation, Fe-rich particles could be oxidized once they were detached from the Mg matrix and, consequently, lose their cathodic activation. Once the corrosion has taken place over majority of the surface, the effects of crystallographic orientation of the underlying metal dominate the last stage of corrosion, which propagates parallel to the (0001) Magnesium alloys are of great value for industrial applications due to their low density and high strength-to-weight ratio. However, a major deficiency is their comparatively poor corrosion resistance when exposed to aqueous and humid environments.1,2 Consequently, there is a demand to develop magnesium alloys with improved corrosion resistance. 2,3The equilibrium potential for magnesium oxidation is well below the equilibrium potential for hydrogen evolution over the entire pH range of practical interest. As a consequence, the cathodic reaction of hydrogen evolution largely dominates over oxygen reduction during corrosion in an aqueous environment. For this reason, the presence of elements with low overpotentials (or high exchange current density) for hydrogen evolution is likely to produce detrimental effects on the corrosion resistance due to increase in the hydrogen evolution rate. Hanawalt et al. 4 found that four elements (Fe, Ni, Cu, and Co) had a very profound effect on accelerating the corrosion rate of Mg in chloride-containing aqueous environments even at concentrations below 0.2 wt%. Subsequent studies have confirmed that the most critical factor affecting the corrosion behavior of Mg is the presence of impurities.3

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Section: Discussionmentioning

confidence: 98%

Corrosion Behavior of Pure Magnesium with Low Iron Content in 3.5 wt% NaCl Solution

Yang

Zhou

Curioni

et al. 2015

J. Electrochem. Soc.

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“…with its surface energy (Abayarathna et al, 1991;Ashton and Hepworth, 1968;Buck and Henry, 1957;Konig and Davepon, 2001;Weininger and Breiter, 1963) which is somewhat associated with the atomic density of a given crystal plane. For example, the lowest index plane (0001) has a significantly higher atomic density than (hki0) planes, thus it has the lowest surface energy and as such should be dissolved slower than the other surfaces (Liu et al, 2008) (refer to Fig.…”

Section: Corrosion Of Mg Alloymentioning

confidence: 99%

Corrosion electrochemistry of magnesium (Mg) and its alloys

Song

2011

Corrosion of Magnesium Alloys

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“…The corrosion rate of a metal can, to some extent, be correlated to its surface energy (Ashton and Hepworth, 1968;Abayarathna et al, 1991;Buck and Henry, 1957;Weininger and Breiter, 1963;Konig and Davepon, 2001) which, in turn, is associated with its atomic density. The corrosion rate of a metal can, to some extent, be correlated to its surface energy (Ashton and Hepworth, 1968;Abayarathna et al, 1991;Buck and Henry, 1957;Weininger and Breiter, 1963;Konig and Davepon, 2001) which, in turn, is associated with its atomic density.…”

Section: Corrosion Of Matrix Phasementioning

confidence: 99%

Corrosion behavior of magnesium alloys and protection techniques

Song

2010

Surface Engineering of Light Alloys

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Effects of sample orientation on the corrosion of zinc in ammonium sulfate and sodium hydroxide solutions

Cited by 73 publications

References 11 publications

Corrosion Behavior of Pure Magnesium with Low Iron Content in 3.5 wt% NaCl Solution

Corrosion Behavior of Pure Magnesium with Low Iron Content in 3.5 wt% NaCl Solution

Corrosion electrochemistry of magnesium (Mg) and its alloys

Corrosion behavior of magnesium alloys and protection techniques

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