Correlation between Electronic States of the Cathodes and Hydrogen Overpotential for Titanium-based Alloys

Morishita, Masao; Chikuda, Masahiro; Ashida, Yoshio; Morinaga, Masahiko; Yukawa, Natsuo; Adachi, Hirohiko

doi:10.2320/jinstmet1952.55.6_720

Cited by 9 publications

(4 citation statements)

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“…4͒, which is because cathodic reaction, i.e., hydrogen evolution reaction, is catalyzed by noble metals such as Pd, Pt, and Ir of less than 0.1 atom %, as reported in Ti alloys. 20,21 The Ni-containing alloy showed a similar E open to the other alloys, although pure Ni enhances cathodic reaction, which is also indicated in Ti-0.1 atom % Ni alloy. 21 The R p increased with the increase in ͓Zr͔/͓Zr ϩ Al͔ as shown in Fig.…”

Section: Discussionmentioning

confidence: 54%

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Surface Composition and Anodic Polarization Behavior of Zirconium-Based Amorphous Alloys in a Phosphate-Buffered Saline Solution

Hiromoto

Asami

Tsai

et al. 2002

J. Electrochem. Soc.

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5 atom % of zirconium in amorphous Zr65Al7.5Cu27.5 alloy was replaced with various M (Pd, Ni, In, Mn, Cr, Ti, Nb, and Zr), to evaluate the effects of alloying elements, M, on the surface composition and anodic polarization behavior of the alloy. The surface oxide of the Zr-M-Al-Cu alloys generated in a deaerated phosphate-buffered saline solution, PBS(−), was characterized using X-ray photoelectron spectroscopy. Also, the alloy was anodically polarized in deaerated PBS(−) to determine open-circuit potential, Enormalopen, polarization resistance, Rnormalp, and pitting potential, Enormalpit. M was incorporated into the surface oxide film with the increase in the oxygen affinity of M, and the relative concentration of Zr to Al, false[normalZrfalse]/false[normalZr+normalAlfalse], was varied. The Rnormalp at Enormalopen increased and Enormalpit decreased with the increase in false[normalZrfalse]/false[normalZr+normalAlfalse]. Therefore, the high value of Rnormalp with the large ratio of false[normalZrfalse]/false[normalZr+normalAlfalse] seems to be caused by the high resistance of Zr-containing oxide to general corrosion and/or the preferential dissolution of Al. Zr-containing oxide is susceptible to pitting corrosion. Eventually, the Rnormalp values of Pd-, Ni-, and Nb-containing alloys were high. The Enormalpit values of Pd-, and In-, Zr-containing alloys were high. © 2002 The Electrochemical Society. All rights reserved.

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Section: Discussionmentioning

confidence: 54%

“…20,21 The Ni-containing alloy showed a similar E open to the other alloys, although pure Ni enhances cathodic reaction, which is also indicated in Ti-0.1 atom % Ni alloy. 21 The R p increased with the increase in ͓Zr͔/͓Zr ϩ Al͔ as shown in Fig. 5.…”

Section: Discussionmentioning

confidence: 54%

Surface Composition and Anodic Polarization Behavior of Zirconium-Based Amorphous Alloys in a Phosphate-Buffered Saline Solution

Hiromoto

Asami

Tsai

et al. 2002

J. Electrochem. Soc.

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“…The oxide film was retard to hydrogenation due to low hydrogen diffusion rate [14]. From theoretical calculation, the density of states near the Fermi level of solid solution state Pd increased followed by acceleration of oxidation due to formation of cathodic surface [15,16]. In addition the formation of thick oxide film on Ti 0.990 Pd 0.010 was good agreement in enhancement of corrosion resistance [17,18].…”

Section: Resultsmentioning

confidence: 99%

Effect of Tiny Pd Addition to Ti for Their Hydrogenation Properties

Kondo¹,

Takeshita²

2017

Proceedings of the 3rd Annual International Conference on Advanced Material Engineering (AME 2017)

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Abstract. Titanium (Ti) based hydrogen-storage materials can absorb hydrogen under mild conditions. However, the materials could not absorb hydrogen without initial activation, owing to the formation of surface oxide layer. For mitigate the initial activation conditions, addition of Pd to Ti based materials were conducted. In spite of a tiny content of Pd, the addition was effective. In this study, effect of Pd in Ti oxide layer on initial hydrogenation property was investigated. Ti (1-x) Pd x (x=0, 0.002, 0.005, 0.010) alloys were fabricated with an arc-melting machine in an Ar atmosphere. Turnings-like specimens were obtained by milling the ingots with a milling machine for increase of specific surface. Initial hydrogenation properties were carried out with a Sievertstype apparatus. Surface property of Ti 0.990 Pd 0.010 before hydrogenation was carried out by X-ray photoelectron spectroscopy. Pd-added Ti alloys rapidly formed Ti hydride compared with pure Ti. Pd in the oxide film existed as valence state of 0 (Pd 0 ). Because metallic Pd was well-known as catalyst for dissociation of molecular hydrogen, Pd-added Ti alloys can faster absorb hydrogen.

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“…15 The corrosion resistance of Ti depends on the passive film alloys formed on surface. [16][17][18][19][20] In the present study, the corrosion resistance of Ni-Ti, SS 316L, and Thermoactive alloys has been evaluated by electrochemical studies such as polarization study and AC impedance spectroscopy in artificial saliva in presence and absence of coffee.…”

Section: Introductionmentioning

confidence: 99%

Influence of Coffee on the Corrosion Resistance of Orthodontic Wires in Artificial Saliva

Mary¹,

Rajendran²,

Jeyasundari³

2017

ECB

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Correlation between Electronic States of the Cathodes and Hydrogen Overpotential for Titanium-based Alloys

Cited by 9 publications

References 0 publications

Surface Composition and Anodic Polarization Behavior of Zirconium-Based Amorphous Alloys in a Phosphate-Buffered Saline Solution

Surface Composition and Anodic Polarization Behavior of Zirconium-Based Amorphous Alloys in a Phosphate-Buffered Saline Solution

Effect of Tiny Pd Addition to Ti for Their Hydrogenation Properties

Influence of Coffee on the Corrosion Resistance of Orthodontic Wires in Artificial Saliva

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