Investigating Corrosion Performance and Corrosive Wear Behavior of Sol–gel/MAO-Coated Mg Alloy

Gu, Yanhong; Zheng, Xusheng; Liu, Qi; Ma, Huijuan; Zhang, Lei; Yang, Dawei

doi:10.1007/s11249-018-1052-8

Cited by 29 publications

(10 citation statements)

References 33 publications

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“…In addition, these micropores will become channels for corrosive media to enter the coating, which will reduce the corrosion resistance of the coating 28 . Research by a large number of scholars 29–32 can find that the corrosion resistance of MAO has been significantly improved after the sealing treatment. Polytetrafluoroethylene (PTFE) and graphite have excellent chemical stability, corrosion resistance, and self‐lubricity, which makes many researchers use them as additives to improve the wear resistance and corrosion resistance of MAO coatings 33–35 …”

Section: Introductionmentioning

confidence: 99%

Study on corrosion resistance of TC4 titanium alloy micro‐arc oxidation/(PTFE + graphite) composite coating

Chen

Zhang

et al. 2021

Int J Applied Ceramic Tech

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Micro-arc oxidation (MAO) coating was prepared on the surface of TC4 titanium alloy and sealed with (polytetrafluoroethylene [PTFE] + graphite) emulsion to obtain MAO/(PTFE + graphite) composite coating. The surface morphology and phase composition of the MAO coating were studied by scanning electron microscope (SEM) and X-ray diffractometer (XRD). The corrosion resistance of the coating was studied by the potentiodynamic polarization curve and the scanning Kelvin probe (SKP) micro-area voltage. The results show that the TiO 2 ceramic oxide coating formed on the surface of the titanium alloy substrate has the characteristics of porous structure, which will become a channel for corrosive media to enter the coating and accelerate the corrosion of the MAO coating. However, the MAO/(PTFE + graphite) composite coating can prevent corrosive media from entering the coating and improve the corrosion resistance of the composite coating. The corrosion potential increased from 0.146 V to 0.241 V, the corrosion current density decreased from 4.31 × 10 -7 A/cm 2 to 7.92 × 10 -8 A/cm 2 , and the self-corrosion current dropped to one fifth of the MAO coating. In addition, the charge transfer resistance has also increased from 5.305 × 10 4 Ω⋅cm 2 to 2.493 × 10 5 Ω⋅cm 2 .

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Section: Introductionmentioning

confidence: 99%

Study on corrosion resistance of TC4 titanium alloy micro‐arc oxidation/(PTFE + graphite) composite coating

Chen

Zhang

et al. 2021

Int J Applied Ceramic Tech

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“…Additionally, GO contains abundant carboxy and carbonyl functional groups, which created strong interfacial bonding via Vander-wall forces with HA molecule and promoted HA attachment resulting in adhesion strength of 40.7 MPa. An alkaline electrolytic solution using Ethylenediaminetetraacetic acid ( EDTA) was prepared by Gu et al [ 144 ] After the MAO coating of AZ31 Mg alloy, the sol-gel dip-coating technique deposited the HA layer. The chelating ability of EDTA resulted in strong and uniform HA deposition with effective sealing of spatial defects, as shown in Fig.…”

Section: Coatings and Their Current Statusmentioning

confidence: 99%

Section: Coatings and Their Current Statusmentioning

confidence: 99%

Progress in bioactive surface coatings on biodegradable Mg alloys: A critical review towards clinical translation

Singh

Batra

Kumar

et al. 2023

Bioactive Materials

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“…31,32 In addition, sealing treatment of the MAO coating can also prevent the intrusion of oxygen medium, so that the oxidation resistance of the coating can be improved. Sol-Gel sealing technology has been paid attention to by many researchers, [33][34][35][36][37] because its method is simple and easy to implement, and it can handle complex shapes well. It can improve the performance of the coating and enhance the corrosion resistance and oxidation resistance of the coating.…”

Section: Introductionmentioning

confidence: 99%

High‐temperature oxidation resistance and antifailure mechanism of MAO‐SG composite coating on TC4 titanium alloy

Chen

Zhang

et al. 2021

Int J Applied Ceramic Tech

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To refine microarc oxidation (MAO) coating surface micropores, and enhance the coating's toughness and oxidation resistance. In the process of MAO, negatively charged CeO 2 particles are adsorbed and deposited into the coating under the action of electrophoresis, and a 6 g/L CeO 2 doped MAO coating is prepared. Then, the Al 2 O 3 -SiO 2 composite sol-gel seal coating was used to obtain the microarc oxidation-sol-gel composite coating (MAO-SG). The TC4 substrate, undoped MAO coating, CeO 2 doped MAO coating, and MAO-SG composite coating were subjected to high-temperature oxidation at 650, 750, and 850 • C, respectively. The results show that the composite coating exhibits excellent hightemperature oxidation resistance at three temperatures. Compared with the undoped MAO coating, the maximum oxidation weight gain per unit area of the MAO-SG coating was reduced by 13.44%, 23.87%, and 38.16%, and the average oxidation rate was reduced by 17.15%, 50.98%, and 69.37%, respectively. The sol-gel layer on the surface of the composite coating will decompose α-Al 2 O 3 at high temperatures, and form a dense protective layer on the surface of the MAO coating and protect the MAO coating, which greatly improves the high-temperature oxidation resistance of the TC4 titanium alloy.

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Investigating Corrosion Performance and Corrosive Wear Behavior of Sol–gel/MAO-Coated Mg Alloy

Cited by 29 publications

References 33 publications

Study on corrosion resistance of TC4 titanium alloy micro‐arc oxidation/(PTFE + graphite) composite coating

Study on corrosion resistance of TC4 titanium alloy micro‐arc oxidation/(PTFE + graphite) composite coating

Progress in bioactive surface coatings on biodegradable Mg alloys: A critical review towards clinical translation

High‐temperature oxidation resistance and antifailure mechanism of MAO‐SG composite coating on TC4 titanium alloy

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