Effects of grain size on the electrochemical corrosion behaviour of electrodeposited nanocrystalline Fe coatings in alkaline solution

Afshari, Vahid; Dehghanian, Changiz

doi:10.1016/j.corsci.2009.05.015

Cited by 97 publications

(34 citation statements)

References 35 publications

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“…33) This is really challenging task, and has been tried with a wide range of grain size that is systematically changed. [33][34][35][36][37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52] Di Schino et al [41][42][43] investigated the effect of grain size on corrosion of several austenitic stainless steels, claiming that the rate of uniform corrosion increase by grain size reduction whereas the rate of intergranular corrosion is opposite. Table 1 lists the selected papers which investigated effect of grain size that spans for conventional range controlled by thermomechanical processing.…”

Section: Introductionmentioning

confidence: 99%

Corrosion of Ultrafine Grained Materials by Severe Plastic Deformation, an Overview

Miyamoto

2016

Mater. Trans.

123

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Corrosion of ultra ne grain (UFG) materials by severe plastic deformation (SPD) is reviewed in light of the existing literature and microstructural change. Fortunately, by holistic survey of the literature, it seems likely that grain re nement by SPD, while enhancing mechanical properties, does not compromise the overall corrosion resistance, and in many case, improve it in comparison with coarse-grained counterparts, although there are some contradictory results within the same materials and same environment. The degree of impact of UFG formation on corrosion is highest in stainless steels followed by aluminum and magnesium alloys whereas it is relatively marginal in pure copper and titanium. The effect of UFG formation by SPD on corrosion is imparted by not only grain re nement, but also other microstructural change occurring commonly in SPD in general and unique to each speci c SPD method. In this review, an attention is paid speci cally to the former case, and this includes shuf ing or redistribution of chemical inhomogeneity into a ner scale, deformation-induced grain boundaries and high internal stress stemming from these grain boundaries. The literature on stress corrosion cracking (SCC) of UFG materials are de nitely insuf cient to nd the general trends, more studies are waited.

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Section: Introductionmentioning

confidence: 99%

Corrosion of Ultrafine Grained Materials by Severe Plastic Deformation, an Overview

Miyamoto

2016

Mater. Trans.

123

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“…Nanocrystalline Zn coatings showed improved corrosion resistance compared to electrogalvanized steel in deaerated 0.5N NaOH solutions [10]. Our studies have also demonstrated that nanocrystalline Fe made by electrodeposition offers superior corrosion resistance in alkaline solution [11]. In contrary, Li and co-workers [12] have shown that the corrosion rate of low-carbon steel in 0.05 M H 2 SO 4 + 0.05 M Na 2 SO 4 aqueous solution decreased with increasing grain size.…”

Section: Introductionmentioning

confidence: 82%

“…The nanocrystalline Fe used in the present study was produced via pulse electrodeposition technique using experimental set up described elsewhere [11]. Coarsegrained specimen was prepared by high-temperature annealing of pure iron (99.99%) at 1050 °C for 3 h in inert atmosphere followed by furnace cooling.…”

Section: Methodsmentioning

confidence: 99%

The Influence of Grain Size of Pure Iron Metal on Corrosion Inhibition in Presence of Sodium Nitrite

Afshari

Dehghanian

2012

Int. J. Mod. Phys. Conf. Ser.

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The effects of grain size reduction on the corrosion inhibition of sodium nitrite were investigated using polarization curves and electrochemical impedance spectroscopy (EIS). Nanocrystalline iron (~ 45 nm) was produced by pulse electrodeposition using citric acid bath. The grain size of a nanocrystalline surface was analyzed by X-ray diffractometry (XRD) and field emission scanning electron microscopy (FESEM). The most intensive first-order peak (211) of the XRD patterns was taken for detailed analysis using a Gaussian fitting curve. The tests were carried out in 25 mg/l NaCl + 57 mg/l Na 2 SO 4 with different concentration of sodium nitrite aqueous solutions. The results revealed that due to the adsorption process which leads to the formation of a protective layer with a greater charge transfer resistance the inhibition effect and corrosion protection of sodium nitrite inhibitor in near-neutral aqueous solutions increased as the grain size decreased from microcrystalline to nanocrystalline. The standard free energy of adsorption (∆G ads ) revealed a strong interaction between inhibitor and nanocrystalline surface. This was attributed to the increased number of the active sites caused by nanocrystalline surface.

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“…For example, Afshari et al [56] have studied the corrosion of iron coatings and the effect of the grain size of electrodeposited iron NC and compared with microcrystalline (MC) samples in alkaline solution. The authors found that a decrease in the grain size slowed down the corrosion rate and explained this behaviour by arguing that OH -ions are adsorbed on the NC surface involving the following chemical-electrochemical-chemicalelectrochemical (CECE) corrosion mechanism:…”

Section: Other Metalsmentioning

confidence: 99%

“…The passive surface is dozens of nano meters thick and restrings the exit of metal ions from the metal surface towards the solution minimizing the corrosion effects. [56] . [56] .…”

Section: Other Metalsmentioning

confidence: 99%

The corrosion behaviour of nanograined metals and alloys

Herrasti¹,

León²,

Walsh³

2012

REVMETAL

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Effects of grain size on the electrochemical corrosion behaviour of electrodeposited nanocrystalline Fe coatings in alkaline solution

Cited by 97 publications

References 35 publications

Corrosion of Ultrafine Grained Materials by Severe Plastic Deformation, an Overview

Corrosion of Ultrafine Grained Materials by Severe Plastic Deformation, an Overview

The Influence of Grain Size of Pure Iron Metal on Corrosion Inhibition in Presence of Sodium Nitrite

The corrosion behaviour of nanograined metals and alloys

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