一步法反应时间对AZ91镁合金表面超疏水涂层耐腐蚀性的影响

doi:10.11896/cldb.22010063

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Abstract One-step method combined hydrothermal etching and modification using stearic acid ethanol and zinc sulfate solution was used to prepare superhydrophobic coatings on the AZ91 magnesium alloys. The effect of reaction times of the one-step method on hydrophobicity and corrosion resistance of superhydrophobic coatings was studied. The phase composition and microstructure of coatings were analyzed by X-ray photoelectron diffractometer (XRD), Fourier transform infrared ray (FTIR), scanning electron microscope (SEM) and EDS spectrum. And the hydrophobicity and corrosion resistance were characterized by contact angle and polarization curve. With the increase of reaction time, the contact angles of the coatings first increased and then decreased. The coating prepared with 7 h of action time had the maximum contact angles of 154.2°, which was a superhydrophobic coating, and the coated sample had the lowest corrosion current density and the biggest impedance, which was 3 orders of magnitude lower and 5 orders of magnitude higher than those of uncoated magnesium alloy matrix, respectively. So, the corrosion resistance of the magnesium alloy was significantly improved.

Key words： AZ91 magnesium alloy superhydrophobic coating one-step process corrosion resistance

Published: 25 September 2023 Online: 2023-09-18

CLC number:

TG178

Fund:Key Laboratory Project of Process Equipment and Control Engineering in Sichuan Universities (GK202011) and College Students' Innovation and Entrepreneurship Project (cx2020176).

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	LI Shaopeng
	WANG Defang
	XIE Wenling
	LI Xiulan
	Li Xuan

Cite this article:

LI Shaopeng,WANG Defang,XIE Wenling, et al. Effect of Reaction Time of One-step on Corrosion Resistance of Superhydrophobic Coatings on AZ91 Magnesium Alloys[J]. Materials Reports, 2023, 37(18): 22010063-6.

URL:

http://www.mater-rep.com/EN/10.11896/cldb.22010063 OR http://www.mater-rep.com/EN/Y2023/V37/I18/22010063

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