TY - JOUR
T1 - Galvanic corrosion behavior of hot-dip Al and 55Al–Zn coatings applied to steel bolted joints in atmospheric environments
AU - Gao, Yang
AU - Kainuma, Shigenobu
AU - Yang, Muye
AU - Ishihara, Shuji
AU - Inoue, Daichi
N1 - Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2023/10/19
Y1 - 2023/10/19
N2 - Atmospheric corrosion is one of the most critical issues in steel structures. To improve the structure's durability and reduce its cost, hot-dip coatings are a significant method for steel protection. The corrosion behavior of Al-based hot-dip coatings has been extensively studied. Galvanic corrosion usually occurs when steel members are coated with different hot-dip coatings and placed in direct contact. In this study, galvanic corrosion of an Al coating in contact with a 55Al–Zn coating in an atmospheric environment was investigated through electrochemical and exposure tests. The galvanic corrosion and its mechanism were studied based on open circuit potential (OCP), galvanic current, and X-ray diffraction (XRD) analyses. This study verified the galvanic corrosion of bolt joints in the actual application by the long-term exposure test. The results suggests that 55Al–Zn coating is a good substitute for Zn coating used for bolted joints in contact with Al-coated steel plate.
AB - Atmospheric corrosion is one of the most critical issues in steel structures. To improve the structure's durability and reduce its cost, hot-dip coatings are a significant method for steel protection. The corrosion behavior of Al-based hot-dip coatings has been extensively studied. Galvanic corrosion usually occurs when steel members are coated with different hot-dip coatings and placed in direct contact. In this study, galvanic corrosion of an Al coating in contact with a 55Al–Zn coating in an atmospheric environment was investigated through electrochemical and exposure tests. The galvanic corrosion and its mechanism were studied based on open circuit potential (OCP), galvanic current, and X-ray diffraction (XRD) analyses. This study verified the galvanic corrosion of bolt joints in the actual application by the long-term exposure test. The results suggests that 55Al–Zn coating is a good substitute for Zn coating used for bolted joints in contact with Al-coated steel plate.
UR - http://www.scopus.com/inward/record.url?scp=85167808236&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85167808236&partnerID=8YFLogxK
U2 - 10.1016/j.conbuildmat.2023.132694
DO - 10.1016/j.conbuildmat.2023.132694
M3 - Article
AN - SCOPUS:85167808236
SN - 0950-0618
VL - 401
JO - Construction and Building Materials
JF - Construction and Building Materials
M1 - 132694
ER -