Incorporation of halloysite nanotubes into forsterite surface layer during plasma electrolytic oxidation of AM50 Mg alloy

Mingo, B.; Guo, Yue; Němcová, A.; Gholinia, Ali; Mohedano, M.; Sun, Mengxing; Matthews, A.; Yerokhin, Aleksey

doi:10.1016/j.electacta.2019.01.047

Cited by 48 publications

(15 citation statements)

References 64 publications

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“…The results of integrated HNTS as nanocontainers of chemical active agents in forsterite PEO-obtained coating on an AM50 alloy were presented by Mingo et al [ 88 ]. They indicated that HNTS modification is strongly influenced by the thermodynamic conditions of the surface.…”

Section: Summarizing Papers and Discussionmentioning

confidence: 99%

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Halloysite in Different Ceramic Products: A Review

Lampropoulou

Papoulis

2021

Materials

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The increased demands of our rapidly developing way of life lead to the broadening of the ceramic market among other effects. Due to the advanced ceramic properties of halloysite and its abundance, combined with its good synergistic effect with other materials, it has been investigated for multifarious possible applications to produce traditional and advanced ceramics as well as ceramic composites. In this review, a substantial number of studies by several investigators into halloysite-based ceramics were are summarized. The possibilities and limitations of different halloysite-based ceramic materials for future applications are also discussed in this manuscript and new fields of research are proposed. The summarization of published results indicates a constant scientific interest in halloysite-based traditional ceramics and new potential uses in the future. Additionally, investigations on different novel ceramic composites with low cost halloysite nanotubes (HNTS) have rapidly increased, covering different scientific and technological areas. On the other hand, research into advanced ceramics (SiAlONS) has been pursued due to its highly cost effective technology treatments on a large scale.

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Section: Summarizing Papers and Discussionmentioning

confidence: 99%

“… SEM micrographs of HNT-containing PEO coatings produced at ( a , b ) 100 Hz, ( c , d ) 500 Hz ( e , f ) 1000 Hz and ( g , h ) 5000 Hz frequencies. Yellow circles indicate remaining HNTS [ 88 ]. …”

Section: Figurementioning

confidence: 99%

Halloysite in Different Ceramic Products: A Review

Lampropoulou

Papoulis

2021

Materials

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“…The greater in crease in pH at the grain boundary β phase may be explained by the increased deposition of coating components relative to that at the α matrix. Beneath the deposited layer a thinner Mg-F-O layer can be formed due to the anodic oxidation of magnesium as shown by Brady et al [12].…”

Section: Coating Formation and Morphologiesmentioning

confidence: 96%

“…Trivalent chromium conversion (TCC) coatings with low toxicity and allowable environmental limits are regarded as promising alternative to CCCs [11]. TCC coatings are formed by a simple, brief dipping process, hence requiring no electrical facilities as are necessary for other common conversion treatments of magnesium alloys, such as anodizing or plasma electrolytic oxidation [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Formation of a trivalent chromium conversion coating on AZ91D magnesium alloy

Gong

et al. 2021

Corrosion Science

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“…Furthermore, increasing the duty cycle resulted in lower ignition voltage, the intensity and density of microdischarges, and a greater energy intensity [35,47] that caused a lower thickness and a higher coating porosity [19,44]. Beatriz Mingo et al revealed that increasing the pulsed unipolar current frequency of AM50 alloy resulted in an enhanced corrosion resistance accompanied by coating morphology refinement [48].…”

Section: Introductionmentioning

confidence: 99%

Improving the Corrosion Behavior of Biodegradable AM60 Alloy through Plasma Electrolytic Oxidation

Alateyah

Aljohani

Alawad

et al. 2021

Metals

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Magnesium (Mg) alloys have unique properties. However, their applications are limited in working environments due to their poor corrosion resistance. Plasma electrolytic oxidation (PEO) is one of the most environmentally friendly and cost-effective ways that has been promoted to treat Mg alloys. In this study, we investigated the effect of electrical parameters on the microstructure, as well as the mechanical and corrosion resistance of AM60 alloy coated with PEO. The electrical parameters studied were current mode (unipolar and bipolar), frequency and duty ratio. The microstructure evolution of the coated AM60 substrates was studied using X-ray diffraction and scanning electron microscopy. Subsequently, the mechanical properties were determined using compression tests and microhardness measurements. The potentiodynamic polarization curves indicated that the PEO-coated samples experienced a significant decrease of 99.9% in the corrosion rate compared to the base metal. The electrochemical impedance spectroscopy findings showed that PEO coating increased the corrosion resistance of the AM60 magnesium alloy by 1071870% compared to the base metal. On the other hand, the PEO coated samples showed superior adhesion to the substrate. Moreover, the PEO coating led to an improvement in the hardness value by 114% compared to base metal, coupled with insignificant change in the compressive properties.

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Incorporation of halloysite nanotubes into forsterite surface layer during plasma electrolytic oxidation of AM50 Mg alloy

Cited by 48 publications

References 64 publications

Halloysite in Different Ceramic Products: A Review

Halloysite in Different Ceramic Products: A Review

Formation of a trivalent chromium conversion coating on AZ91D magnesium alloy

Improving the Corrosion Behavior of Biodegradable AM60 Alloy through Plasma Electrolytic Oxidation

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