Effects of nanocrystallization on the corrosion behavior of 309 stainless steel

Ye, Wei; Liu, Ying; Wang, Fuhui

doi:10.1016/j.electacta.2005.12.034

Cited by 127 publications

(62 citation statements)

References 17 publications

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“…[131] In a similar study, the corrosion resistance of nanocrystalline 309 stainless steel coating developed by DC magnetron sputtering (DCMS) (grain size <50 nm) was compared with bulk 309 stainless steel in 0.25M Na 2 SO 4 + 0.05M H 2 SO 4 ( Figure 9). [133] In the Na 2 SO 4 solution, there was a difference in the active and active-passive transition behavior of the nanocrystalline coating and bulk alloy, but the overall span of the passive region and the transpassive potentials were quite similar. The authors have attributed the improved localized corrosion resistances to the surface homogeneity and finer grain size in case of the nanocrystalline coating, whereas high resistance to breakdown of the passive film by sulfate ion in case of bulk alloy.…”

Section: B Fe-based Alloy Systemsmentioning

confidence: 99%

“…9-Potentiodynamic polarization for 309SS cast alloy and nanocrystalline coating in (a) 0.25M Na 2 SO 4 + 0.05M H 2 SO 4 solution, (b) 0.5M NaCl + 0.05M H 2 SO 4 solution. [133] considerable amount of Fe-Al oxides (over 13 pct) in the nanocrystalline coating. Therefore, it is possible that the decrease in corrosion resistance is not due to the nanocrystalline structure of the coating.…”

Section: B Fe-based Alloy Systemsmentioning

confidence: 99%

“…The claimed role of diffusion in enhancing aqueous corrosion resistance of stainless steel at low temperatures, as suggested in literature [102,130] has received a strong criticism in a very recent report [124] on the basis of the very low diffusivities (i.e., 10 À40 to 10 À43 m 2 /s) at the test temperatures. A few studies [102,[130][131][132][133] have also compared the electrochemical corrosion of nanocrystalline and microcrystalline alloys with high Cr contents (>18 wt pct). Electrochemical corrosion resistance of a nanocrystalline surface of 316 stainless steel developed by surface mechanical attrition treatment (SMAT) was found to be considerably inferior to the microcrystalline unmodified bulk.…”

Section: B Fe-based Alloy Systemsmentioning

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: B Fe-based Alloy Systemsmentioning

confidence: 99%

Section: B Fe-based Alloy Systemsmentioning

confidence: 99%

Section: B Fe-based Alloy Systemsmentioning

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 significant difference in N d for the three specimens reflects a pronounced variation in the number of oxygen vacancies and/or cation interstitials in the passive films. It is commonly accepted that the carrier density (N d or N a ) is closely related to the stability and conductivity of the passive film, which in turn determines the corrosion resistance of the coating material underneath [37,51,71,73]. The higher carrier density is associated with more disordered structure of the passive film, and the lower carrier density signifies a more stable and dielectric passive film.…”

Section: Influence Of Nb Addition On the Electronic Properties Of Pasmentioning

confidence: 99%

“…They found that an outer p-type hydroxide layer contributed predominantly to the non-linear section in the Mott-Schottky plot. The methodology proposed by Jiang et al applies to the bipolar passive films with n-p heterojunction structure, as represented by the passive films formed on the various Fe-Cr alloys [69][70][71]. According to the results of XPS analysis, the passive films formed on the two as-deposited nanocrystalline coatings are a mixture of diverse oxides, such as TiO 2 , Nb 2 O 5 and SiO 2 , all of which are characterized by n-type semiconducting properties.…”

Section: Influence Of Nb Addition On the Electronic Properties Of Pasmentioning

confidence: 99%

Niobium addition enhancing the corrosion resistance of nanocrystalline Ti5Si3 coating in H2SO4 solution

Liu

et al. 2014

Acta Materialia

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nanocrystalline coatings were deposited onto Ti-6Al-4V substrates by a double glow discharge plasma technique. The effects of Nb alloying on the electrochemical behavior of the Ti 5 Si 3 nanocrystalline coatings were systematically investigated in a naturally aerated 5 wt.% H 2 SO 4 solution, for which various electrochemical techniques, including potentiodynamic polarization, electrochemical impedance spectroscopy (EIS), potentiostatic polarization and Mott-Schottky analysis, were employed. Moreover, to evaluate the corrosion performance of the as-deposited coatings over an extended period, their corrosion resistance was analyzed after 7 days' immersion in a 5 wt.% H 2 SO 4 solution by EIS measurements and observations of corroded surface morphologies. The results showed that the Ti 62.5Àx Nb x Si 37.5 (x = 0, 6.3, 12.5) nanocrystalline coatings exhibit superior corrosion resistance compared with Ti-6Al-4V, and their corrosion resistance is enhanced with increasing Nb content, suggesting that Nb alloying is an effective strategy for improving the corrosion protection ability of the Ti 5 Si 3 nanocrystalline coating. The roles of Nb additions in enhancing the corrosion resistance of the Ti 5 Si 3 nanocrystalline coatings can be summarized as: (a) reducing the residual tensile stresses of the as-deposited coatings and (b) tailoring the composition, compactness and electronic structure of the passive films formed. These findings are expected to broaden the application of Ti 5 Si 3 as a highly corrosion-resistant coating for engineering components operating under aggressive conditions.

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Electrochemical Corrosion Behaviour of Nanocrystalline Materials

Elkedim

2008

Nanostructured Materials in Electrochemistry

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Nanocrystalline materials have received much attention as a result of their unique physical, chemical and mechanical properties, and have been the subjects of intensive research activities both in the scientific and industrial communities.Nanocrystalline materials -that is, single or multiphase polycrystalline solids with a characteristic grain size of a few nanometers -represent a promising class of new materials. Owing to the extremely small crystallite dimensions (typically 1 to 100 nm), they are characterized structurally by a large volume fraction of interfaces which may lead to improvements in a variety of properties [1].Current spending on corrosion-related problems accounts for more than 3% of the worlds gross domestic product (GDP), and characterization of the corrosion behavior of nanocrystalline materials is important both for prospective engineering applications and for a better understanding of the above fundamental physicochemical properties [2,3]. In many cases the industrial application of novel materials will ultimately depend on their corrosion resistance over extended periods of service. For this reason, corrosion problems must be considered at an appropriate stage of material development.A limited number of investigations have concentrated on the corrosion of nanocrystalline materials. Rofagha et al. [4,5] studied nanocrystalline Ni and Ni-P produced by an electrodeposition technique, whereupon the observed behaviour was considered to be consistent with substantial contributions to the bulk electrochemical behavior from the intercrystalline regions (i.e., grain boundaries and triple junctions) of these materials.Inturi and Szklarska-Smialowska [6] have observed improved localized corrosion resistance in HCl for sputter-deposited nanocrystalline type 304 stainless steel in comparison with conventional material, and attributed this to the fine grain size and homogeneity of the nanocrystalline materials. Thorpe et al. [7] studied the corrosion behavior of nanocrystalline Fe 32 Ni 36 Cr 14 P 12 B 6 alloy obtained by crystallization of the melt-spun amorphous ribbon. These authors determined that the corrosion resistance of this material was significantly greater than that of its amorphous counterpart, and attributed the improvement to the observed greater Cr enrichment of the electrochemical surface via rapid interphase boundary diffusion [8].It is difficult to predict the electrochemical behavior of nanocrystalline materials from the known properties of their coarse-grained polycrystalline analogues. Thus, several groups have observed that nanocrystalline materials exhibit enhanced oxidation and corrosion resistance compared to their conventional microcrystalline counterparts [9][10][11][12]. In contrast, results obtained in other studies have shown nanocrystalline materials to have higher rates of dissolution and corrosion [13,14].The aim of this chapter is to outline the aqueous corrosion research activities currently being undertaken on nanocrystalline materials, with key results being extrac...

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Effects of nanocrystallization on the corrosion behavior of 309 stainless steel

Cited by 127 publications

References 17 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

Niobium addition enhancing the corrosion resistance of nanocrystalline Ti5Si3 coating in H2SO4 solution

Electrochemical Corrosion Behaviour of Nanocrystalline Materials

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