Uniform corrosion of titanium in alkaline hydrogen peroxide conditions

Influence of transition metals and inhibitors calcium and silicate

Jaakko Rämö, Kari Saarinen, M. Sillanpää

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

Abstract

Uniform corrosion of titanium was studied in alkaline hydrogen peroxide environments simulating pulp bleaching conditions.
Corrosion rates of unalloyed Grade 2 and alloyed Grade 5 were determined as a function of hydrogen peroxide anion (HOO−) concentration. Influences of calcium and silicate inhibitors and iron and manganese were investigated.
Without inhibition titanium corroded at HOO− content of 200 mg/l: Grade 2 0.4 mm/y and Grade 5 1.4 mm/y. Addition of calcium (Ca2+) and silicate (SiO32−) diminished the corrosion of Grade 2 to critical anion level 400 mg/l, but could not protect Grade 5 even at the HOO− concentration of 300 mg/l.
Presence of iron and manganese raised the critical levels of the both grades. High HOO− anion level was observed as a notable potential difference between titanium and platinum.
Original languageEnglish
Pages (from-to)898-901
JournalMaterials and Corrosion
Volume53
Issue number12
DOIs
Publication statusPublished - 2002
MoE publication typeA1 Journal article-refereed

Fingerprint

transition element
Corrosion inhibitors
Titanium
Hydrogen peroxide
hydrogen peroxide
Hydrogen Peroxide
titanium
Silicates
Transition metals
Anions
anion
corrosion
inhibitor
Calcium
Negative ions
silicate
calcium
Corrosion
Manganese
manganese

Keywords

  • pulp bleaching

Cite this

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abstract = "Uniform corrosion of titanium was studied in alkaline hydrogen peroxide environments simulating pulp bleaching conditions. Corrosion rates of unalloyed Grade 2 and alloyed Grade 5 were determined as a function of hydrogen peroxide anion (HOO−) concentration. Influences of calcium and silicate inhibitors and iron and manganese were investigated. Without inhibition titanium corroded at HOO− content of 200 mg/l: Grade 2 0.4 mm/y and Grade 5 1.4 mm/y. Addition of calcium (Ca2+) and silicate (SiO32−) diminished the corrosion of Grade 2 to critical anion level 400 mg/l, but could not protect Grade 5 even at the HOO− concentration of 300 mg/l. Presence of iron and manganese raised the critical levels of the both grades. High HOO− anion level was observed as a notable potential difference between titanium and platinum.",
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Uniform corrosion of titanium in alkaline hydrogen peroxide conditions : Influence of transition metals and inhibitors calcium and silicate. / Rämö, Jaakko; Saarinen, Kari; Sillanpää, M.

In: Materials and Corrosion, Vol. 53, No. 12, 2002, p. 898-901.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Uniform corrosion of titanium in alkaline hydrogen peroxide conditions

T2 - Influence of transition metals and inhibitors calcium and silicate

AU - Rämö, Jaakko

AU - Saarinen, Kari

AU - Sillanpää, M.

PY - 2002

Y1 - 2002

N2 - Uniform corrosion of titanium was studied in alkaline hydrogen peroxide environments simulating pulp bleaching conditions. Corrosion rates of unalloyed Grade 2 and alloyed Grade 5 were determined as a function of hydrogen peroxide anion (HOO−) concentration. Influences of calcium and silicate inhibitors and iron and manganese were investigated. Without inhibition titanium corroded at HOO− content of 200 mg/l: Grade 2 0.4 mm/y and Grade 5 1.4 mm/y. Addition of calcium (Ca2+) and silicate (SiO32−) diminished the corrosion of Grade 2 to critical anion level 400 mg/l, but could not protect Grade 5 even at the HOO− concentration of 300 mg/l. Presence of iron and manganese raised the critical levels of the both grades. High HOO− anion level was observed as a notable potential difference between titanium and platinum.

AB - Uniform corrosion of titanium was studied in alkaline hydrogen peroxide environments simulating pulp bleaching conditions. Corrosion rates of unalloyed Grade 2 and alloyed Grade 5 were determined as a function of hydrogen peroxide anion (HOO−) concentration. Influences of calcium and silicate inhibitors and iron and manganese were investigated. Without inhibition titanium corroded at HOO− content of 200 mg/l: Grade 2 0.4 mm/y and Grade 5 1.4 mm/y. Addition of calcium (Ca2+) and silicate (SiO32−) diminished the corrosion of Grade 2 to critical anion level 400 mg/l, but could not protect Grade 5 even at the HOO− concentration of 300 mg/l. Presence of iron and manganese raised the critical levels of the both grades. High HOO− anion level was observed as a notable potential difference between titanium and platinum.

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U2 - 10.1002/maco.200290003

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