TY - JOUR
T1 - Facile fabrication of superhydrophobic zinc coatings with corrosion resistanceviaan electrodeposition process
AU - Hu, Chuanbo
AU - Xie, Xinying
AU - Zheng, Hui
AU - Qing, Yongquan
AU - Ren, Kangning
N1 - Funding information:
The authors would like to acknowledge the financial support from the National Natural Science Foundation of China (No. 51773173), Hong Kong Baptist University (FRG2/17-18/102, RC-IRMS/16-17/03), and the HKBU SKL-CRF (SKLP_1718_P01). The authors are also thankful for the Surface Analysis & Material Characterization Laboratory of HKBU for providing the facilities for the research.
Publisher copyright:
© The Royal Society of Chemistry and the Centre National de la Recherche Scientifique 2020
PY - 2020/6/7
Y1 - 2020/6/7
N2 - In this investigation, we demonstrated a controlled electrodeposition method by varying the current density to generate hierarchical structures of zinc (Zn) on a carbon steel surface, which serves as a hydrophobic and anticorrosion coating when further modified by stearic acid to form a covalently bonded layer that offers low surface energy. The chemical composition, surface morphology and roughness of the modified Zn coatings were analyzedviaX-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), and confocal laser scanning microscopy (CLSM). The water contact angle and wettability tests have shown that the modified Zn coating with a micro/nanostructure displayed a water contact angle of 158.7° and a sliding angle of 6.4°, indicating strong superhydrophobicity. Interestingly, the modified Zn coating with a micro/nanostructure exhibited strong mechanical stability during knife scratching and adhesive tape peeling tests. In addition, the modified superhydrophobic Zn coating showed improved corrosion resistance that provided protection to the carbon steel. The protection mechanism can be attributed to the hierarchical micro/nanostructure of the Zn surface itself and the formation of a hydrophobic zinc stearate complex compound. The superhydrophobic Zn coating has good application prospects in a neutral corrosion environment, where it retards corrosion and reduces the adhesion of water.
AB - In this investigation, we demonstrated a controlled electrodeposition method by varying the current density to generate hierarchical structures of zinc (Zn) on a carbon steel surface, which serves as a hydrophobic and anticorrosion coating when further modified by stearic acid to form a covalently bonded layer that offers low surface energy. The chemical composition, surface morphology and roughness of the modified Zn coatings were analyzedviaX-ray photoelectron spectroscopy (XPS), field emission scanning electron microscopy (FESEM), and confocal laser scanning microscopy (CLSM). The water contact angle and wettability tests have shown that the modified Zn coating with a micro/nanostructure displayed a water contact angle of 158.7° and a sliding angle of 6.4°, indicating strong superhydrophobicity. Interestingly, the modified Zn coating with a micro/nanostructure exhibited strong mechanical stability during knife scratching and adhesive tape peeling tests. In addition, the modified superhydrophobic Zn coating showed improved corrosion resistance that provided protection to the carbon steel. The protection mechanism can be attributed to the hierarchical micro/nanostructure of the Zn surface itself and the formation of a hydrophobic zinc stearate complex compound. The superhydrophobic Zn coating has good application prospects in a neutral corrosion environment, where it retards corrosion and reduces the adhesion of water.
UR - http://www.scopus.com/inward/record.url?scp=85085729695&partnerID=8YFLogxK
U2 - 10.1039/D0NJ00561D
DO - 10.1039/D0NJ00561D
M3 - Journal article
AN - SCOPUS:85085729695
SN - 1144-0546
VL - 44
SP - 8890
EP - 8901
JO - New Journal of Chemistry
JF - New Journal of Chemistry
IS - 21
ER -