Achieving an acid resistant surface on magnesium alloy via bio-inspired design

Hao Wu; Zhen Shi; Xuming Zhang; Abdul Mateen Qasim; Shu Xiao; Fan Zhang; Zhongzhen Wu; Guosong Wu; Kejian Ding; Paul K. Chu

doi:10.1016/j.apsusc.2019.01.181

Achieving an acid resistant surface on magnesium alloy via bio-inspired design

Hao Wu, Zhen Shi, Xuming Zhang, Abdul Mateen Qasim, Shu Xiao, Fan Zhang, Zhongzhen Wu, Guosong Wu^*, Kejian Ding, Paul K. Chu^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

80 Citations (Scopus)

Abstract

Developing acid-resistant magnesium alloys is challenging because of the high chemical reactivity of magnesium in acidic media. In this work, a bio-inspired strategy by taking advantage of the super-hydrophobic effects on lotus leaves is described. The self-layered coating consisting of an inner compact layer and outer Mg-Al layered double hydroxide (LDH) microsheet-based layer prepared hydrothermally exhibits enhanced corrosion resistance in saline solutions but cannot resist corrosion in sulfuric acid. After depositing a fluorocarbon polymer film on the microsheets using a polytetrafluoroethylene (PTFE) target by magnetron sputtering, a super-hydrophobic surface is created on the magnesium alloy. Compared to the surface modified hydrothermally, the super-hydrophobic surface provides better corrosion protection in H₂SO₄ due to trapped air pockets in the microsheet array. The dual process offers a promising means to mitigate corrosion of magnesium alloys in acidic media.

Original language	English
Pages (from-to)	150-161
Journal	Applied Surface Science
Volume	478
Online published	22 Jan 2019
DOIs	https://doi.org/10.1016/j.apsusc.2019.01.181
Publication status	Published - 1 Jun 2019

Research Keywords

Corrosion resistance
Hydrothermal treatment
Magnesium alloy
Magnetron sputtering
Super-hydrophobic surface

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@article{39dd402cac144464bb486893d231b835,

title = "Achieving an acid resistant surface on magnesium alloy via bio-inspired design",

abstract = "Developing acid-resistant magnesium alloys is challenging because of the high chemical reactivity of magnesium in acidic media. In this work, a bio-inspired strategy by taking advantage of the super-hydrophobic effects on lotus leaves is described. The self-layered coating consisting of an inner compact layer and outer Mg-Al layered double hydroxide (LDH) microsheet-based layer prepared hydrothermally exhibits enhanced corrosion resistance in saline solutions but cannot resist corrosion in sulfuric acid. After depositing a fluorocarbon polymer film on the microsheets using a polytetrafluoroethylene (PTFE) target by magnetron sputtering, a super-hydrophobic surface is created on the magnesium alloy. Compared to the surface modified hydrothermally, the super-hydrophobic surface provides better corrosion protection in H2SO4 due to trapped air pockets in the microsheet array. The dual process offers a promising means to mitigate corrosion of magnesium alloys in acidic media.",

keywords = "Corrosion resistance, Hydrothermal treatment, Magnesium alloy, Magnetron sputtering, Super-hydrophobic surface",

author = "Hao Wu and Zhen Shi and Xuming Zhang and Qasim, {Abdul Mateen} and Shu Xiao and Fan Zhang and Zhongzhen Wu and Guosong Wu and Kejian Ding and Chu, {Paul K.}",

year = "2019",

month = jun,

day = "1",

doi = "10.1016/j.apsusc.2019.01.181",

language = "English",

volume = "478",

pages = "150--161",

journal = "Applied Surface Science",

issn = "0169-4332",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Achieving an acid resistant surface on magnesium alloy via bio-inspired design

AU - Wu, Hao

AU - Shi, Zhen

AU - Zhang, Xuming

AU - Qasim, Abdul Mateen

AU - Xiao, Shu

AU - Zhang, Fan

AU - Wu, Zhongzhen

AU - Wu, Guosong

AU - Ding, Kejian

AU - Chu, Paul K.

PY - 2019/6/1

Y1 - 2019/6/1

N2 - Developing acid-resistant magnesium alloys is challenging because of the high chemical reactivity of magnesium in acidic media. In this work, a bio-inspired strategy by taking advantage of the super-hydrophobic effects on lotus leaves is described. The self-layered coating consisting of an inner compact layer and outer Mg-Al layered double hydroxide (LDH) microsheet-based layer prepared hydrothermally exhibits enhanced corrosion resistance in saline solutions but cannot resist corrosion in sulfuric acid. After depositing a fluorocarbon polymer film on the microsheets using a polytetrafluoroethylene (PTFE) target by magnetron sputtering, a super-hydrophobic surface is created on the magnesium alloy. Compared to the surface modified hydrothermally, the super-hydrophobic surface provides better corrosion protection in H2SO4 due to trapped air pockets in the microsheet array. The dual process offers a promising means to mitigate corrosion of magnesium alloys in acidic media.

AB - Developing acid-resistant magnesium alloys is challenging because of the high chemical reactivity of magnesium in acidic media. In this work, a bio-inspired strategy by taking advantage of the super-hydrophobic effects on lotus leaves is described. The self-layered coating consisting of an inner compact layer and outer Mg-Al layered double hydroxide (LDH) microsheet-based layer prepared hydrothermally exhibits enhanced corrosion resistance in saline solutions but cannot resist corrosion in sulfuric acid. After depositing a fluorocarbon polymer film on the microsheets using a polytetrafluoroethylene (PTFE) target by magnetron sputtering, a super-hydrophobic surface is created on the magnesium alloy. Compared to the surface modified hydrothermally, the super-hydrophobic surface provides better corrosion protection in H2SO4 due to trapped air pockets in the microsheet array. The dual process offers a promising means to mitigate corrosion of magnesium alloys in acidic media.

KW - Corrosion resistance

KW - Hydrothermal treatment

KW - Magnesium alloy

KW - Magnetron sputtering

KW - Super-hydrophobic surface

UR - http://www.scopus.com/inward/record.url?scp=85060709585&partnerID=8YFLogxK

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85060709585&origin=recordpage

U2 - 10.1016/j.apsusc.2019.01.181

DO - 10.1016/j.apsusc.2019.01.181

M3 - RGC 21 - Publication in refereed journal

SN - 0169-4332

VL - 478

SP - 150

EP - 161

JO - Applied Surface Science

JF - Applied Surface Science

ER -

Achieving an acid resistant surface on magnesium alloy via bio-inspired design

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Achieving an acid resistant surface on magnesium alloy via bio-inspired design

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GRF: Nanostructured Ti-Based and Polymeric Orthopedic Implant Materials with Tailored Mechanobiocidal and Osteogenic Properties

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