The corrosion behaviour of nanocrystalline nickel

Rofagha, R.; Langer, R.; El-Sherik, A.M.; Erb, U.; Palumbo, G.; Aust, K.T.

doi:10.1016/0956-716x(91)90171-v

Cited by 203 publications

(118 citation statements)

References 13 publications

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“…[11,[120][121][122] So, in simplistic terms, the corrosion rate of a material in nanocrystalline state should be much higher as compared to that in its microcrystalline form. Some experimental evidences have supported this view [10,117,121,122] while majority have shown contradictory behavior. [116,[123][124][125] This section will first list a few of the studies on different alloy systems and then subsequently summarize the common characteristics which govern the corrosion in nanocrystalline materials.…”

Section: Aqueous Corrosionmentioning

confidence: 62%

“…Early fundamental studies on the role of nanostructure in electrochemical corrosion were carried out on Co, [107][108][109] Cu, [107,[110][111][112] Ni, [10,[113][114][115][116] and Ni-based binaries. [9,[117][118][119] Traditionally, it is believed that electrochemical inhomogeneity at the metal surface due to the excess of high energy areas with much greater degree of disorder like grain boundaries and triple junctions (such as those in the case of the nanocrystalline materials), can make these materials more anodic.…”

Section: Aqueous Corrosionmentioning

confidence: 99%

“…However, nanocrystalline metals and alloys have been reported to exhibit different oxidation/corrosion resistance to their microcrystalline counterparts. [8][9][10][11] It is also emphasized that besides the interest in investigating the role of nanocrystalline structure in oxidation/corrosion, another attractive aspect is the possibility of exploiting the enhanced grain boundary diffusion for the purpose of developing oxidation/corrosion resistant alloys with considerably less alloying contents. [8] In this context, developing commercially viable material processing routes for producing and retaining nanocrystalline structure of oxidation/corrosion resistant alloys is a major but non-trivial challenge.…”

Section: Introductionmentioning

confidence: 99%

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Role of Nanostructure in Electrochemical Corrosion and High Temperature Oxidation: A Review

Mahesh

Raman

2014

Metall Mater Trans A

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The extremely fine grain size of nanocrystalline (nc) metallic alloys results in significantly different mechanical, electrochemical and oxidation properties as compared to the coarse-grained alloys of the same composition. Although the synthesis and attractive mechanical properties of nanocrystalline materials have been investigated and reviewed in great depth, the high temperature oxidation and electrochemical corrosion of these materials has received limited attention. The difference in the active dissolution and passivation behavior of nc alloys as compared to their microcrystalline counterparts varies for each alloy system. However, a unified theory explaining these phenomena still eludes us. In this context, this article reviews the progress in the electrochemical corrosion behavior of different nanocrystalline alloys, and hence, develops a better understanding of the effect of grain size, composition, interfacial phenomena and selective dissolution on corrosion of nanocrystalline alloys. This review also presents the role of nanometric grain size and the associated increase in grain boundary diffusion on the high temperature oxidation of nc alloys. The attractive possibility of enhanced oxidation resistance at lower alloying additions as compared to the coarse-grained alloys has been discussed. Although the primary focus of the article is on ferrous alloy systems, however, the lead studies on the role of ultrafine grain size in oxidation/corrosion behavior of other alloys systems have also been reviewed.

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Section: Aqueous Corrosionmentioning

confidence: 62%

Section: Aqueous Corrosionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Role of Nanostructure in Electrochemical Corrosion and High Temperature Oxidation: A Review

Mahesh

Raman

2014

Metall Mater Trans A

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“…It has been suggested that this should allow for easier Ni cation diffusion through a more defective film, thereby leading to higher ipass [20]. The lower tendency for localized grain boundary corrosion in nanocrystalline nickel has also been earlier observed [21]. For JP and JP-T, there is evidence of a significant decrease in the critical pitting potential compared to the BM.…”

Section: Electrochemical Impedance Spectroscopymentioning

confidence: 59%

Effect of Different Welding Processes on Electrochemical and Corrosion Behavior of Pure Nickel in 1 M NaCl Solution

Wang

Zhang

et al. 2017

Metals

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Abstract:A plasma arc welding (PAW)-tungsten inert gas (TIG) hybrid welding process is proposed to weld pure nickel. In PAW-TIG welding, the arc of the PAW was first to be ignited, then TIG was ignited, while in PAW welding, only the PAW arc was launched. This paper investigated the effect of different welding processes on electrochemical and corrosion performance of between a pure nickel joint and a base metal in an aerated 1 M NaCl solution, respectively. The average grain size of the joint fabricated by PAW welding (denoted as J P joint) is 463.57 µm, the joint fabricated by PAW-TIG welding(denoted as J P-T joint) is 547.32 µm, and the base metal (BM) is 47.32 µm. In this work, the passivity behaviors of samples were characterized for two welding processes by electrochemical impedance spectroscopy (EIS), open circuit potential versus immersion time (OCP-t), and the potentiodynamic polarization plots. EIS spectra, attained with different immersion times, were analyzed and fitted by an equivalent electrical circuit. Photomicrographs of BM, J P , and J P-T were also taken with a scanning electron microscope (SEM) to reveal the morphological structure of the pit surfaces. Electrochemical tests show that the sequence of the corrosion resistance is BM > J P > J P-T . The size and quantity of the hemispherical corrosion pits of all samples are different. The corrosion morphology observations found a consistency with the consequence of the electrochemical measurements. The results show that an increase of the grain dimensions due to different heat treatments decreased the pure nickel stability to pitting corrosion.

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“…Further annealing at 400 0 C as well as annealing at 500 0 C and 600 0 C resulted in excessive microstructure coarsening indicated by a decrease in hardness. [30,[42][43][44]. It has been demonstrated that, as far as overall corrosion rate is concerned, the excellent corrosion performance of Ni is not compromised significantly by grain size reduction.…”

Section: Propertiesmentioning

confidence: 99%

Electrodeposited Nanostructured Films and Coatings: Synthesis, Structure, Properties and Applications

Erb

Palumbo²,

Aust

2000

Nanostructured Films and Coatings

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The corrosion behaviour of nanocrystalline nickel

Cited by 203 publications

References 13 publications

Role of Nanostructure in Electrochemical Corrosion and High Temperature Oxidation: A Review

Role of Nanostructure in Electrochemical Corrosion and High Temperature Oxidation: A Review

Effect of Different Welding Processes on Electrochemical and Corrosion Behavior of Pure Nickel in 1 M NaCl Solution

Electrodeposited Nanostructured Films and Coatings: Synthesis, Structure, Properties and Applications

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