Influence of alloyed Nd content on the corrosion of an Al–5Mg alloy

Wang, Yuehui; Gupta, Rajeev; Sukiman, Nazatul Liana; Zhang, Ruifeng; Davies, Chris; Birbilis, Nick

doi:10.1016/j.corsci.2013.03.034

Cited by 64 publications

(28 citation statements)

References 44 publications

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“…Intermetallics with similar corrosion potentials as Al, or those unable to sustain large currents at the mixed potential of the alloy minimise localised corrosion. Intermetallics of Al with Sc [19], Sr [20,21], Nd [22,23], and Zr [3] have minor electrochemical effects in an Al matrix, avoiding severe pitting corrosion. Besides chemical composition, the size of the intermetallics also plays a role in the corrosion process; intermetallics above a critical size results in appreciable localised corrosion [16,17,24].…”

Section: Introductionmentioning

confidence: 99%

Corrosion behaviour and hardness of in situ consolidated nanostructured Al and Al–Cr alloys produced via high-energy ball milling

et al. 2015

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Section: Introductionmentioning

confidence: 99%

Corrosion behaviour and hardness of in situ consolidated nanostructured Al and Al–Cr alloys produced via high-energy ball milling

et al. 2015

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“…Many studies have demonstrated that β phase precipitation and corrosion of Al alloys depend on the chemical composition121314, mechanical processing151617 , and elevated-temperature exposure1819. For example, Zhang et al studied the influence of grain size and grain orientation on the sensitization of Al 5083 processed by rolling, equal channel angular processing and high-pressure torsion17.…”

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confidence: 99%

Improve sensitization and corrosion resistance of an Al-Mg alloy by optimization of grain boundaries

Yan

Heckman

Velasco

et al. 2016

Sci Rep

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The sensitization and subsequent intergranular corrosion of Al-5.3 wt.% Mg alloy has been shown to be an important factor in stress corrosion cracking of Al-Mg alloys. Understanding sensitization requires the review of grain boundary character on the precipitation process which can assist in developing and designing alloys with improved corrosion resistance. This study shows that the degree of precipitation in Al-Mg alloy is dependent on grain boundary misorientation angle, adjacent grain boundary planes and grain boundary types. The results show that the misorientation angle is the most important factor influencing precipitation in grain boundaries of the Al-Mg alloy. Low angle grain boundaries (≤15°) have better immunity to precipitation and grain boundary acid attack. High angle grain boundaries (>15°) are vulnerable to grain boundary acid attack. Grain boundaries with adjacent plane orientations near to {100} have potential for immunity to precipitation and grain boundary acid attack. This work shows that low Σ (Σ ≤ 29) coincident site lattice (CSL) grain boundaries have thinner β precipitates. Modified nitric acid mass loss test and polarization test demonstrated that the global corrosion resistance of sputtered Al-Mg alloy is enhanced. This may be attributed to the increased fractions of low Σ (Σ ≤ 29) CSL grain boundaries after sputtering.

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“…On the other hand, it is believed that arc thermal effects during the thermal spray coating process are almost never influenced on their mechanical properties. The reason is that Al-Mg alloys do not attribute to age hardening, and their strength is from the combination of work hardening and solid solution strengthening [10,12,13]. Figure 2 shows the corrosion potential measurements of SS400 (substrate) as well as the Al and Al-Mg alloy spraycoated specimens for 72 h in a natural seawater solution.…”

Section: Methodsmentioning

confidence: 99%

Electrochemical Characteristics in Seawater for Cold Thermal Spray-Coated Al–Mg Alloy Layer

Park

Kim

2016

Acta Metall. Sin. (Engl. Lett.)

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For corrosion protection of carbon steel in a marine environment, cold arc thermal spray coating was applied to the surface with Al and Al-Mg alloy wires. The surface hardness of Al and Al-Mg thermal spray coatings increased with Mg content. And the various electrochemical experiments were carried out to evaluate corrosion damage characteristics of the thermal spray coating layers. The Al and Al-Mg thermal spray coating layers presented negative potentials compared to carbon steel in corrosion potential measurements. And an anodic polarization experiment revealed a tendency of activation polarization with no passivation. Furthermore, the corrosion damage of the thermal spray coating layer in galvanostatic experiment was observed mainly at the defect area, and the Al-3Mg thermal spray coating layer presented less surface damages than others. In addition, the Al-3Mg thermal spray coating layer showed the lowest corrosion rate while having a sufficient driving voltage for cathodic corrosion protection. Therefore, it is an optimal thermal spray material for sacrificial anode.

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Influence of alloyed Nd content on the corrosion of an Al–5Mg alloy

Cited by 64 publications

References 44 publications

Corrosion behaviour and hardness of in situ consolidated nanostructured Al and Al–Cr alloys produced via high-energy ball milling

Corrosion behaviour and hardness of in situ consolidated nanostructured Al and Al–Cr alloys produced via high-energy ball milling

Improve sensitization and corrosion resistance of an Al-Mg alloy by optimization of grain boundaries

Electrochemical Characteristics in Seawater for Cold Thermal Spray-Coated Al–Mg Alloy Layer

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