Real-time corrosion monitoring system under in situ conditions of crystalline groundwater

Research output: Contribution to conferenceConference articleScientific

Abstract

An in situ corrosion monitoring system was developed to monitor real-time corrosion rates of two stainless steel grades (EN 1.4301 and EN 1.4404). The corrosion monitoring system relied on linear polarization resistant (LPR) method. Besides the electrochemical coupons, the monitoring system contained gravimetric specimens to confirm the results of electrochemical measurements. The results of this study can be used when evaluating risks of the microbially induced corrosion of metallic materials in the underground radioactive waste repository.
Low and intermediate level radioactive waste (LLW and ILW) is produced during the operation, maintenance and decommissioning of nuclear power plants. The metallic waste includes pipes, valves, filters and tools, the majority of which is made of various stainless steels and carbon steel. In Finland at Olkiluoto nuclear power plant site, the LLW and ILW have been disposed of in a geological repository located at the depth of 60 of 95 m below surface since 1992.
Surprisingly, higher corrosion rates were detected in the molybdenum contained stainless steel type EN 1.4404 compared to the lower alloyed type EN 1.4301. This indicates possible role of microbial activity in corrosion. Microbial community from groundwater has been earlier analyzed and a vast bacterial and archaeal community was discovered. The microbial community involved microbial groups linked frequently to MIC. Here, thick biofilm was detected on surfaces of both steel grades. Results during the exposure of two years are presented and discussed here.
Original languageEnglish
Pages114552
Number of pages9
Publication statusPublished - 2018
MoE publication typeNot Eligible
EventEuropean Corrosion Congress, EUROCORR 2018 - Krakow, Poland
Duration: 9 Sep 201813 Sep 2018

Conference

ConferenceEuropean Corrosion Congress, EUROCORR 2018
Abbreviated titleEUROCORR 2018
CountryPoland
CityKrakow
Period9/09/1813/09/18

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monitoring system
corrosion
steel
groundwater
nuclear power plant
repository
radioactive waste
microbial community
decommissioning
molybdenum
microbial activity
biofilm
in situ
pipe
polarization
filter
carbon
rate

Cite this

Carpen, L., Rajala, P., & Kinnunen, T. (2018). Real-time corrosion monitoring system under in situ conditions of crystalline groundwater. 114552. Paper presented at European Corrosion Congress, EUROCORR 2018, Krakow, Poland.
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title = "Real-time corrosion monitoring system under in situ conditions of crystalline groundwater",
abstract = "An in situ corrosion monitoring system was developed to monitor real-time corrosion rates of two stainless steel grades (EN 1.4301 and EN 1.4404). The corrosion monitoring system relied on linear polarization resistant (LPR) method. Besides the electrochemical coupons, the monitoring system contained gravimetric specimens to confirm the results of electrochemical measurements. The results of this study can be used when evaluating risks of the microbially induced corrosion of metallic materials in the underground radioactive waste repository.Low and intermediate level radioactive waste (LLW and ILW) is produced during the operation, maintenance and decommissioning of nuclear power plants. The metallic waste includes pipes, valves, filters and tools, the majority of which is made of various stainless steels and carbon steel. In Finland at Olkiluoto nuclear power plant site, the LLW and ILW have been disposed of in a geological repository located at the depth of 60 of 95 m below surface since 1992.Surprisingly, higher corrosion rates were detected in the molybdenum contained stainless steel type EN 1.4404 compared to the lower alloyed type EN 1.4301. This indicates possible role of microbial activity in corrosion. Microbial community from groundwater has been earlier analyzed and a vast bacterial and archaeal community was discovered. The microbial community involved microbial groups linked frequently to MIC. Here, thick biofilm was detected on surfaces of both steel grades. Results during the exposure of two years are presented and discussed here.",
author = "Leena Carpen and Pauliina Rajala and Tuomo Kinnunen",
note = "Abstract reviewed? Article ID: 114552; European Corrosion Congress, EUROCORR 2018, EUROCORR 2018 ; Conference date: 09-09-2018 Through 13-09-2018",
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Carpen, L, Rajala, P & Kinnunen, T 2018, 'Real-time corrosion monitoring system under in situ conditions of crystalline groundwater' Paper presented at European Corrosion Congress, EUROCORR 2018, Krakow, Poland, 9/09/18 - 13/09/18, pp. 114552.

Real-time corrosion monitoring system under in situ conditions of crystalline groundwater. / Carpen, Leena; Rajala, Pauliina; Kinnunen, Tuomo.

2018. 114552 Paper presented at European Corrosion Congress, EUROCORR 2018, Krakow, Poland.

Research output: Contribution to conferenceConference articleScientific

TY - CONF

T1 - Real-time corrosion monitoring system under in situ conditions of crystalline groundwater

AU - Carpen, Leena

AU - Rajala, Pauliina

AU - Kinnunen, Tuomo

N1 - Abstract reviewed? Article ID: 114552

PY - 2018

Y1 - 2018

N2 - An in situ corrosion monitoring system was developed to monitor real-time corrosion rates of two stainless steel grades (EN 1.4301 and EN 1.4404). The corrosion monitoring system relied on linear polarization resistant (LPR) method. Besides the electrochemical coupons, the monitoring system contained gravimetric specimens to confirm the results of electrochemical measurements. The results of this study can be used when evaluating risks of the microbially induced corrosion of metallic materials in the underground radioactive waste repository.Low and intermediate level radioactive waste (LLW and ILW) is produced during the operation, maintenance and decommissioning of nuclear power plants. The metallic waste includes pipes, valves, filters and tools, the majority of which is made of various stainless steels and carbon steel. In Finland at Olkiluoto nuclear power plant site, the LLW and ILW have been disposed of in a geological repository located at the depth of 60 of 95 m below surface since 1992.Surprisingly, higher corrosion rates were detected in the molybdenum contained stainless steel type EN 1.4404 compared to the lower alloyed type EN 1.4301. This indicates possible role of microbial activity in corrosion. Microbial community from groundwater has been earlier analyzed and a vast bacterial and archaeal community was discovered. The microbial community involved microbial groups linked frequently to MIC. Here, thick biofilm was detected on surfaces of both steel grades. Results during the exposure of two years are presented and discussed here.

AB - An in situ corrosion monitoring system was developed to monitor real-time corrosion rates of two stainless steel grades (EN 1.4301 and EN 1.4404). The corrosion monitoring system relied on linear polarization resistant (LPR) method. Besides the electrochemical coupons, the monitoring system contained gravimetric specimens to confirm the results of electrochemical measurements. The results of this study can be used when evaluating risks of the microbially induced corrosion of metallic materials in the underground radioactive waste repository.Low and intermediate level radioactive waste (LLW and ILW) is produced during the operation, maintenance and decommissioning of nuclear power plants. The metallic waste includes pipes, valves, filters and tools, the majority of which is made of various stainless steels and carbon steel. In Finland at Olkiluoto nuclear power plant site, the LLW and ILW have been disposed of in a geological repository located at the depth of 60 of 95 m below surface since 1992.Surprisingly, higher corrosion rates were detected in the molybdenum contained stainless steel type EN 1.4404 compared to the lower alloyed type EN 1.4301. This indicates possible role of microbial activity in corrosion. Microbial community from groundwater has been earlier analyzed and a vast bacterial and archaeal community was discovered. The microbial community involved microbial groups linked frequently to MIC. Here, thick biofilm was detected on surfaces of both steel grades. Results during the exposure of two years are presented and discussed here.

M3 - Conference article

SP - 114552

ER -

Carpen L, Rajala P, Kinnunen T. Real-time corrosion monitoring system under in situ conditions of crystalline groundwater. 2018. Paper presented at European Corrosion Congress, EUROCORR 2018, Krakow, Poland.