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Construction of Super-hydrophobic Structure on Surface of Super Ferritic Stainless Steel B44660 and Its Corrosion Resistance |
ZHANG Dalei(), WEI Enze, JING He, YANG Liuyang, DOU Xiaohui, LI Tongyue |
School of Materials Science and Engineering, China University of Petroleum (East China), Qingdao 266580, China |
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Cite this article:
ZHANG Dalei, WEI Enze, JING He, YANG Liuyang, DOU Xiaohui, LI Tongyue. Construction of Super-hydrophobic Structure on Surface of Super Ferritic Stainless Steel B44660 and Its Corrosion Resistance. Chinese Journal of Materials Research, 2021, 35(1): 7-16.
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Abstract A uniform and dense superhydrophobic film on the surface of super ferritic stainless steel B44660 was prepared via spontaneous polymerization of dopamine in the presence of low surface energy substances ODA and PFDT. Then the wettability, surface morphology and chemical structure of the steel with simple- and modified-dopamine coatings were characterized by means of water spray condensation experiment, scanning electron microscope (SEM), X-ray energy spectrum analysis (EDS), impedance spectroscopy and polarization curve tests. The results show that the super ferritic stainless steel with simple dopamine coating is hydrophilic, and however the super ferritic stainless steel surface with super hydrophobic coating has lower corrosion current density and higher coating resistance, the modification treatment can obviously improve the corrosion resistance of the simple dopamine coating on super ferritic stainless steel surface. The super-hydrophobic film formed on the surface of the simple dopamine coating presents large amount of "micro-nano structured air valleys", which prevents the diffusion of strongly corrosive chloride ions between the solution and the solid interface and the electrochemical reaction of the interface. Therefore, the corrosion current density is reduced, correspondingly improving the corrosion resistance of the coating.
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Received: 08 May 2020
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Fund: National Natural Science Foundation of China(51774314);Natural Science Foundation in Shandong Province(ZR2018MEM002);the Fundamental Research Funds for the Central Universities(19CX05001A) |
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