TY - JOUR
T1 - Electrochemical investigations of steels in seawater sea sand concrete environments
AU - Yu, Xiang
AU - Al-Saadi, Saad
AU - Zhao, Xiao-Ling
AU - Raman, R. K.Singh
N1 - Funding Information:
Funding: This research was funded by Australian Research Council (ARC) through an ARC Discovery Project Grant (DP160100739).
Publisher Copyright:
© 2021 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2021/9/30
Y1 - 2021/9/30
N2 - Seawater and sea sand concrete (SWSSC) is an environmentally friendly alternative to ordinary Portland cement concrete for civil construction. However, the detrimental effect of high chloride content of SWSSC on the corrosion resistance of steel reinforcement is a concern. This study undertook the electrochemical corrosion behaviour and surface characterizations of a mild steel and two stainless steels (AISI type 304 and 316) in various simulated concrete environments, including the alkaline + chloride environment (i.e., SWSSC). Open circuit potential (OCP), potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) were employed. Though chloride is detrimental to the corrosion resistance of mild steels, a simultaneous presence of high alkalinity in SWSSC negate the detrimental effect of chloride. In the case of stainless steels, a high level of alkalinity is found to be detrimental, whereas chloride seems to have less detrimental effect on their corrosion resistance.
AB - Seawater and sea sand concrete (SWSSC) is an environmentally friendly alternative to ordinary Portland cement concrete for civil construction. However, the detrimental effect of high chloride content of SWSSC on the corrosion resistance of steel reinforcement is a concern. This study undertook the electrochemical corrosion behaviour and surface characterizations of a mild steel and two stainless steels (AISI type 304 and 316) in various simulated concrete environments, including the alkaline + chloride environment (i.e., SWSSC). Open circuit potential (OCP), potentiodynamic polarization (PDP), electrochemical impedance spectroscopy (EIS) and scanning electron microscopy (SEM) were employed. Though chloride is detrimental to the corrosion resistance of mild steels, a simultaneous presence of high alkalinity in SWSSC negate the detrimental effect of chloride. In the case of stainless steels, a high level of alkalinity is found to be detrimental, whereas chloride seems to have less detrimental effect on their corrosion resistance.
KW - Electrochemical impedance spectroscopy (EIS)
KW - Open circuit potential (OCP)
KW - Potentiodynamic polarization (PDP)
KW - Seawater and sea sand concrete (SWSSC)
UR - https://www.scopus.com/pages/publications/85116088378
U2 - 10.3390/ma14195713
DO - 10.3390/ma14195713
M3 - Article
C2 - 34640111
AN - SCOPUS:85116088378
SN - 1996-1944
VL - 14
JO - Materials
JF - Materials
IS - 19
M1 - 5713
ER -