On-line high temperature electrophoresis technique for evaluating stress corrosion cracking risk of stainless steels in cooking process

Heikki Leinonen; Heli Sirén; Pertti Vastamäki; Stella Rovio; Seppo Peltonen; Teemu Työppönen; Jaakko Rämö

On-line high temperature electrophoresis technique for evaluating stress corrosion cracking risk of stainless steels in cooking process

Heikki Leinonen, Heli Sirén, Pertti Vastamäki, Stella Rovio, Seppo Peltonen, Teemu Työppönen, Jaakko Rämö

University of Oulu

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

Abstract

On-line high temperature capillary electrophoresis instrument (HotUCE) was constructed for analysis of corrosive ions at normal pulping process temperatures in synthetic liquors in order to evaluate stress corrosion cracking (SCC) susceptibility of stainless steels. The HotUCE-instrument was on-line coupled to an autoclave, where welded duplex stainless steel samples were immersed 500 h in the simulated high ionic strength hot black, hot white or green liquors at temperatures below 210°C. The results showed that only minor amounts of oxidized sulphur compounds emerged. Amounts of sulphur species correlate with the corrosion potential changes of the duplex stainless steel specimens during the cooking experiments. The increase of sulphite during cooking was higher in hot white than in hot black liquor. The results indicate that SCC risk was enhanced at higher temperatures most probably due to increased formation of thiosulphate.

Original language	English
Title of host publication	Proceedings of a Corrosion Conference and Expo (CORROSION 2007)
Place of Publication	Houston, TX, USA
Publisher	National Association of Corrosion Engineers (NACE)
Number of pages	16
ISBN (Print)	978-1-61567-057-4
Publication status	Published - 2007
MoE publication type	A4 Article in a conference publication
Event	Corrosion Conference and Expo 2007, Corrosion 2007 - Nashville, United States Duration: 11 Mar 2007 → 15 Mar 2007

Conference

Conference	Corrosion Conference and Expo 2007, Corrosion 2007
Abbreviated title	Corrosion 2007
Country/Territory	United States
City	Nashville
Period	11/03/07 → 15/03/07

Keywords

electrophoresis
high temperature
on-line
stress corrosion cracking
stainless steels
welding
hot white liquor
hot black liquour
green liquor
pulp and paper industry

Cite this

Leinonen, H., Sirén, H., Vastamäki, P., Rovio, S., Peltonen, S., Työppönen, T., & Rämö, J. (2007). On-line high temperature electrophoresis technique for evaluating stress corrosion cracking risk of stainless steels in cooking process. In Proceedings of a Corrosion Conference and Expo (CORROSION 2007) Article 07213 National Association of Corrosion Engineers (NACE).

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title = "On-line high temperature electrophoresis technique for evaluating stress corrosion cracking risk of stainless steels in cooking process",

abstract = "On-line high temperature capillary electrophoresis instrument (HotUCE) was constructed for analysis of corrosive ions at normal pulping process temperatures in synthetic liquors in order to evaluate stress corrosion cracking (SCC) susceptibility of stainless steels. The HotUCE-instrument was on-line coupled to an autoclave, where welded duplex stainless steel samples were immersed 500 h in the simulated high ionic strength hot black, hot white or green liquors at temperatures below 210°C. The results showed that only minor amounts of oxidized sulphur compounds emerged. Amounts of sulphur species correlate with the corrosion potential changes of the duplex stainless steel specimens during the cooking experiments. The increase of sulphite during cooking was higher in hot white than in hot black liquor. The results indicate that SCC risk was enhanced at higher temperatures most probably due to increased formation of thiosulphate.",

keywords = "electrophoresis, high temperature, on-line, stress corrosion cracking, stainless steels, welding, hot white liquor, hot black liquour, green liquor, pulp and paper industry",

author = "Heikki Leinonen and Heli Sir{\'e}n and Pertti Vastam{\"a}ki and Stella Rovio and Seppo Peltonen and Teemu Ty{\"o}pp{\"o}nen and Jaakko R{\"a}m{\"o}",

year = "2007",

language = "English",

isbn = "978-1-61567-057-4",

booktitle = "Proceedings of a Corrosion Conference and Expo (CORROSION 2007)",

publisher = "National Association of Corrosion Engineers (NACE)",

address = "United States",

note = "Corrosion Conference and Expo 2007, Corrosion 2007, Corrosion 2007 ; Conference date: 11-03-2007 Through 15-03-2007",

}

Leinonen, H, Sirén, H, Vastamäki, P, Rovio, S, Peltonen, S, Työppönen, T & Rämö, J 2007, On-line high temperature electrophoresis technique for evaluating stress corrosion cracking risk of stainless steels in cooking process. in Proceedings of a Corrosion Conference and Expo (CORROSION 2007)., 07213, National Association of Corrosion Engineers (NACE), Houston, TX, USA, Corrosion Conference and Expo 2007, Corrosion 2007, Nashville, Tennessee, United States, 11/03/07.

On-line high temperature electrophoresis technique for evaluating stress corrosion cracking risk of stainless steels in cooking process. / Leinonen, Heikki; Sirén, Heli; Vastamäki, Pertti et al.
Proceedings of a Corrosion Conference and Expo (CORROSION 2007). Houston, TX, USA: National Association of Corrosion Engineers (NACE), 2007. 07213.

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

T1 - On-line high temperature electrophoresis technique for evaluating stress corrosion cracking risk of stainless steels in cooking process

AU - Leinonen, Heikki

AU - Sirén, Heli

AU - Vastamäki, Pertti

AU - Rovio, Stella

AU - Peltonen, Seppo

AU - Työppönen, Teemu

AU - Rämö, Jaakko

PY - 2007

Y1 - 2007

N2 - On-line high temperature capillary electrophoresis instrument (HotUCE) was constructed for analysis of corrosive ions at normal pulping process temperatures in synthetic liquors in order to evaluate stress corrosion cracking (SCC) susceptibility of stainless steels. The HotUCE-instrument was on-line coupled to an autoclave, where welded duplex stainless steel samples were immersed 500 h in the simulated high ionic strength hot black, hot white or green liquors at temperatures below 210°C. The results showed that only minor amounts of oxidized sulphur compounds emerged. Amounts of sulphur species correlate with the corrosion potential changes of the duplex stainless steel specimens during the cooking experiments. The increase of sulphite during cooking was higher in hot white than in hot black liquor. The results indicate that SCC risk was enhanced at higher temperatures most probably due to increased formation of thiosulphate.

AB - On-line high temperature capillary electrophoresis instrument (HotUCE) was constructed for analysis of corrosive ions at normal pulping process temperatures in synthetic liquors in order to evaluate stress corrosion cracking (SCC) susceptibility of stainless steels. The HotUCE-instrument was on-line coupled to an autoclave, where welded duplex stainless steel samples were immersed 500 h in the simulated high ionic strength hot black, hot white or green liquors at temperatures below 210°C. The results showed that only minor amounts of oxidized sulphur compounds emerged. Amounts of sulphur species correlate with the corrosion potential changes of the duplex stainless steel specimens during the cooking experiments. The increase of sulphite during cooking was higher in hot white than in hot black liquor. The results indicate that SCC risk was enhanced at higher temperatures most probably due to increased formation of thiosulphate.

KW - electrophoresis

KW - high temperature

KW - on-line

KW - stress corrosion cracking

KW - stainless steels

KW - welding

KW - hot white liquor

KW - hot black liquour

KW - green liquor

KW - pulp and paper industry

M3 - Conference article in proceedings

SN - 978-1-61567-057-4

BT - Proceedings of a Corrosion Conference and Expo (CORROSION 2007)

PB - National Association of Corrosion Engineers (NACE)

CY - Houston, TX, USA

T2 - Corrosion Conference and Expo 2007, Corrosion 2007

Y2 - 11 March 2007 through 15 March 2007

ER -

On-line high temperature electrophoresis technique for evaluating stress corrosion cracking risk of stainless steels in cooking process

Abstract

Conference

Keywords

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