Microstructure and corrosion behavior of PEO-LDHs-SDS superhydrophobic composite film on magnesium alloy. (November 2022)

• Record Type: Journal Article
• Authors: Wang, Haiyang; Song, Yulai; Chen, Xuegang; Tong, Guodong; Zhang, Linyang
• Is Part Of: Corrosion science. Volume 208(2022)
• Publication Date: 2022-11
• Subjects: Magnesium alloy -- Layered double hydroxides -- PEO -- Composite film -- Corrosion behavior -- Corrosion inhibitor; Corrosion and anti-corrosives -- Periodicals; 620.11223
• DOI: 10.1016/j.corsci.2022.110699
• Languages: English
• ISSNs: 0010-938X

Abstract

Abstract: The MgAl-LDHs film was in situ grown on the PEO film of magnesium alloy by hydrothermal growth method, and the PEO-LDHs-SDS composite film modified by sodium dodecyl sulfate (SDS) was further prepared. The results show that compared with the single-layer PEO film, the PEO-LDHs-SDS composite film exhibits excellent short-term and long-term protection performance, which can be attributed to the blocking effect of the superhydrophobic surface of the composite film, the sealing effect of LDHs on the micropores of the PEO film, and the readsorption and corrosion inhibition of SDS anions. Graphical Abstract: ga1 Highlights: The MgAl-LDHs film was grown in situ on PEO film by hydrothermal growth method. The superhydrophobic PEO-LDHs-SDS composite film was further obtained by SDS modification. The LDHs nanoplates perfectly seal the microporous defects on the PEO film. The PEO-LDHs-SDS composite film exhibits durable hydrophobicity and long-term protective properties.