Influence of long-term aqueous exposure on surface properties of plasma-sprayed oxides Cr2O3 and Cr2O3-25 wt% TiO2

Mika Harju; Mikael Järn; Per Dahlsten; Juha Pekka Nikkanen; Jarl B. Rosenholm; Tapio Mäntylä

doi:10.1016/j.jcis.2008.06.010

Influence of long-term aqueous exposure on surface properties of plasma-sprayed oxides Cr2O3 and Cr2O3-25 wt% TiO2

Mika Harju, Mikael Järn, Per Dahlsten, Juha Pekka Nikkanen, Jarl B. Rosenholm, Tapio Mäntylä

Laboratory of Molecular Science and Engineering

Research output: Contribution to journal › Article › Scientific › peer-review

13 Citations (Scopus)

Abstract

The influence of water exposure on the surface properties of plasma-sprayed Cr2O3 and Cr2O3-25 wt% TiO2 was studied. It was shown that both plasma-sprayed materials contained Cr(VI) hydrous oxide phases, which dissolved rapidly at the beginning of water exposure. The dissolution continued slowly during the whole water exposure time. The Cr(VI) dissolution was accompanied by a rapid increase in surface IEP value. Both Cr2O3 and Cr2O3-25 wt% TiO2 showed similar dissolution, zeta potential, and surface oxidation states. Thus the addition of TiO2 did not influence the surface properties of the plasma-sprayed Cr2O3. © 2008 Elsevier Inc. All rights reserved.

Original language	English
Pages (from-to)	403-410
Number of pages	8
Journal	Journal of Colloid and Interface Science
Volume	326
Issue number	2
DOIs	https://doi.org/10.1016/j.jcis.2008.06.010
Publication status	Published - 2008
MoE publication type	A1 Journal article-refereed

Keywords

Chromia
Dissolution
IEP
Plasma spraying
Surface state
Zeta potential

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10.1016/j.jcis.2008.06.010

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title = "Influence of long-term aqueous exposure on surface properties of plasma-sprayed oxides Cr2O3 and Cr2O3-25 wt% TiO2",

abstract = "The influence of water exposure on the surface properties of plasma-sprayed Cr2O3 and Cr2O3-25 wt% TiO2 was studied. It was shown that both plasma-sprayed materials contained Cr(VI) hydrous oxide phases, which dissolved rapidly at the beginning of water exposure. The dissolution continued slowly during the whole water exposure time. The Cr(VI) dissolution was accompanied by a rapid increase in surface IEP value. Both Cr2O3 and Cr2O3-25 wt% TiO2 showed similar dissolution, zeta potential, and surface oxidation states. Thus the addition of TiO2 did not influence the surface properties of the plasma-sprayed Cr2O3. {\textcopyright} 2008 Elsevier Inc. All rights reserved.",

keywords = "Chromia, Dissolution, IEP, Plasma spraying, Surface state, Zeta potential",

author = "Mika Harju and Mikael J{\"a}rn and Per Dahlsten and Nikkanen, {Juha Pekka} and Rosenholm, {Jarl B.} and Tapio M{\"a}ntyl{\"a}",

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doi = "10.1016/j.jcis.2008.06.010",

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T1 - Influence of long-term aqueous exposure on surface properties of plasma-sprayed oxides Cr2O3 and Cr2O3-25 wt% TiO2

AU - Harju, Mika

AU - Järn, Mikael

AU - Dahlsten, Per

AU - Nikkanen, Juha Pekka

AU - Rosenholm, Jarl B.

AU - Mäntylä, Tapio

PY - 2008

Y1 - 2008

N2 - The influence of water exposure on the surface properties of plasma-sprayed Cr2O3 and Cr2O3-25 wt% TiO2 was studied. It was shown that both plasma-sprayed materials contained Cr(VI) hydrous oxide phases, which dissolved rapidly at the beginning of water exposure. The dissolution continued slowly during the whole water exposure time. The Cr(VI) dissolution was accompanied by a rapid increase in surface IEP value. Both Cr2O3 and Cr2O3-25 wt% TiO2 showed similar dissolution, zeta potential, and surface oxidation states. Thus the addition of TiO2 did not influence the surface properties of the plasma-sprayed Cr2O3. © 2008 Elsevier Inc. All rights reserved.

AB - The influence of water exposure on the surface properties of plasma-sprayed Cr2O3 and Cr2O3-25 wt% TiO2 was studied. It was shown that both plasma-sprayed materials contained Cr(VI) hydrous oxide phases, which dissolved rapidly at the beginning of water exposure. The dissolution continued slowly during the whole water exposure time. The Cr(VI) dissolution was accompanied by a rapid increase in surface IEP value. Both Cr2O3 and Cr2O3-25 wt% TiO2 showed similar dissolution, zeta potential, and surface oxidation states. Thus the addition of TiO2 did not influence the surface properties of the plasma-sprayed Cr2O3. © 2008 Elsevier Inc. All rights reserved.

KW - Chromia

KW - Dissolution

KW - IEP

KW - Plasma spraying

KW - Surface state

KW - Zeta potential

UR - https://www.mendeley.com/catalogue/29b9f9b5-aead-3147-a5d0-039a08926b47/

U2 - 10.1016/j.jcis.2008.06.010

DO - 10.1016/j.jcis.2008.06.010

M3 - Article

SN - 0021-9797

VL - 326

SP - 403

EP - 410

JO - Journal of Colloid and Interface Science

JF - Journal of Colloid and Interface Science

IS - 2

ER -

Influence of long-term aqueous exposure on surface properties of plasma-sprayed oxides Cr2O3 and Cr2O3-25 wt% TiO2

Abstract

Keywords

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