TY - JOUR
T1 - Corrosion behavior of ca6nm in simulated geothermal brine highlighted by electrochemical impedance spectroscopy (Eis)
AU - Nikitasari, Arini
AU - Mabruri, Efendi
AU - Riastuti, Rini
N1 - Funding Information:
All authors contributed equally to this work. All authors discussed the results and implications and commented on the manuscript at all stages. Gratitude is expressed to the Research Center for Metallurgy and Materials, Indonesian Institute of Sciences for financial support during this project in the fiscal year 2020.
Publisher Copyright:
© 2021, Paulus Editora. All rights reserved.
PY - 2021
Y1 - 2021
N2 - Martensitic stainless steel CA6NM has the potential to be utilized as a turbine blade material for geothermal power plants because of its superior mechanical properties. However, the turbine blade material for geothermal power plants must have not only superior mechanical properties but also excellent corrosion resistance. Therefore, in this study, CA6NM was modified by varying its molybdenum (Mo) and nitrogen (N) contents to improve its corrosion resistance in the geothermal environment. The Mo and N contents of CA6NM were modified as follows: CA6NM1 with 1% Mo, CA6NM2 with 2% Mo, and CA6NM3 with 2% Mo and 0.1% N. Two temperature parameters, i.e., room temperature and 60°C, and two CO2 gas parameters, i.e., presence and absence of CO2 gas, were utilized in this study. To understand the corrosion behavior of modified CA6NM in geothermal brine, the electrochemical impedance spectroscopy (EIS) test was performed in simulated geothermal brine. The results of the EIS test showed that both Mo and N can increase the corrosion resistance of CA6NM in simulated geothermal brine at 60°C.
AB - Martensitic stainless steel CA6NM has the potential to be utilized as a turbine blade material for geothermal power plants because of its superior mechanical properties. However, the turbine blade material for geothermal power plants must have not only superior mechanical properties but also excellent corrosion resistance. Therefore, in this study, CA6NM was modified by varying its molybdenum (Mo) and nitrogen (N) contents to improve its corrosion resistance in the geothermal environment. The Mo and N contents of CA6NM were modified as follows: CA6NM1 with 1% Mo, CA6NM2 with 2% Mo, and CA6NM3 with 2% Mo and 0.1% N. Two temperature parameters, i.e., room temperature and 60°C, and two CO2 gas parameters, i.e., presence and absence of CO2 gas, were utilized in this study. To understand the corrosion behavior of modified CA6NM in geothermal brine, the electrochemical impedance spectroscopy (EIS) test was performed in simulated geothermal brine. The results of the EIS test showed that both Mo and N can increase the corrosion resistance of CA6NM in simulated geothermal brine at 60°C.
KW - CA6NM
KW - EIS
KW - Geothermal
KW - Molybdenum
KW - Turbine blade
UR - http://www.scopus.com/inward/record.url?scp=85108996723&partnerID=8YFLogxK
U2 - 10.14456/easr.2021.38
DO - 10.14456/easr.2021.38
M3 - Article
AN - SCOPUS:85108996723
SN - 2539-6161
VL - 48
SP - 359
EP - 367
JO - Engineering and Applied Science Research
JF - Engineering and Applied Science Research
IS - 4
ER -
