Self-healing Plasma Electrolytic Oxidation Coatings Doped with Benzotriazole Loaded Halloysite Nanotubes on AM50 Magnesium Alloy

M Sun; Aleksey Yerokhin; M.Ya.  Bychkovac; D.V.  Shtansky; E.A.  Levashov; Allan Matthews

doi:10.1016/j.corsci.2016.06.016

Self-healing Plasma Electrolytic Oxidation Coatings Doped with Benzotriazole Loaded Halloysite Nanotubes on AM50 Magnesium Alloy

M Sun, Aleksey Yerokhin, M.Ya. Bychkovac, D.V. Shtansky, E.A. Levashov, Allan Matthews

The University of Sheffield

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Abstract

Halloysite nanotubes (HNT) and benzotriazole (BTA) loaded HNT were added to a silicate-based electrolyte to produce PEO coatings on AM50 alloy. The coatings were characterised by SEM, EDX and XRD methods. Corrosion behaviour in 3.5 wt.% NaCl was studied by EIS and PDP scans. The HNT increased coating scratch resistance greater than BTA-HNT, although the latter enhanced corrosion resistance due to a self-healing effect. This was triggered by a dense Mg(OH)2 film being formed on corrosion sites following partial coating degradation, preventing pitting corrosion. The single-step process for producing self-healing PEO coatings has good potential in corrosion protection of Mg.

Original language	English
Pages (from-to)	753-769
Number of pages	17
Journal	Corrosion Science
Volume	111
Early online date	15 Jun 2016
DOIs	https://doi.org/10.1016/j.corsci.2016.06.016
Publication status	Published - Oct 2016

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10.1016/j.corsci.2016.06.016

BTA-HNT-PEO AM50 _FinalAccepted author manuscript, 11.1 MB

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title = "Self-healing Plasma Electrolytic Oxidation Coatings Doped with Benzotriazole Loaded Halloysite Nanotubes on AM50 Magnesium Alloy",

abstract = "Halloysite nanotubes (HNT) and benzotriazole (BTA) loaded HNT were added to a silicate-based electrolyte to produce PEO coatings on AM50 alloy. The coatings were characterised by SEM, EDX and XRD methods. Corrosion behaviour in 3.5 wt.% NaCl was studied by EIS and PDP scans. The HNT increased coating scratch resistance greater than BTA-HNT, although the latter enhanced corrosion resistance due to a self-healing effect. This was triggered by a dense Mg(OH)2 film being formed on corrosion sites following partial coating degradation, preventing pitting corrosion. The single-step process for producing self-healing PEO coatings has good potential in corrosion protection of Mg.",

author = "M Sun and Aleksey Yerokhin and M.Ya. Bychkovac and D.V. Shtansky and E.A. Levashov and Allan Matthews",

year = "2016",

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doi = "10.1016/j.corsci.2016.06.016",

language = "English",

volume = "111",

pages = "753--769",

journal = "Corrosion Science",

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T1 - Self-healing Plasma Electrolytic Oxidation Coatings Doped with Benzotriazole Loaded Halloysite Nanotubes on AM50 Magnesium Alloy

AU - Sun, M

AU - Yerokhin, Aleksey

AU - Bychkovac, M.Ya.

AU - Shtansky, D.V.

AU - Levashov, E.A.

AU - Matthews, Allan

PY - 2016/10

Y1 - 2016/10

N2 - Halloysite nanotubes (HNT) and benzotriazole (BTA) loaded HNT were added to a silicate-based electrolyte to produce PEO coatings on AM50 alloy. The coatings were characterised by SEM, EDX and XRD methods. Corrosion behaviour in 3.5 wt.% NaCl was studied by EIS and PDP scans. The HNT increased coating scratch resistance greater than BTA-HNT, although the latter enhanced corrosion resistance due to a self-healing effect. This was triggered by a dense Mg(OH)2 film being formed on corrosion sites following partial coating degradation, preventing pitting corrosion. The single-step process for producing self-healing PEO coatings has good potential in corrosion protection of Mg.

AB - Halloysite nanotubes (HNT) and benzotriazole (BTA) loaded HNT were added to a silicate-based electrolyte to produce PEO coatings on AM50 alloy. The coatings were characterised by SEM, EDX and XRD methods. Corrosion behaviour in 3.5 wt.% NaCl was studied by EIS and PDP scans. The HNT increased coating scratch resistance greater than BTA-HNT, although the latter enhanced corrosion resistance due to a self-healing effect. This was triggered by a dense Mg(OH)2 film being formed on corrosion sites following partial coating degradation, preventing pitting corrosion. The single-step process for producing self-healing PEO coatings has good potential in corrosion protection of Mg.

U2 - 10.1016/j.corsci.2016.06.016

DO - 10.1016/j.corsci.2016.06.016

M3 - Article

SN - 0010-938X

VL - 111

SP - 753

EP - 769

JO - Corrosion Science

JF - Corrosion Science

ER -

Self-healing Plasma Electrolytic Oxidation Coatings Doped with Benzotriazole Loaded Halloysite Nanotubes on AM50 Magnesium Alloy

Abstract

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