Hydroxyquinoline/nano-graphene oxide composite coating of self-healing functionality on treated Mg alloys AZ31

The polymerized Hydroxyquinoline (HQ) coatings incorporated with corrosion inhibitor nano-Graphene Oxide (GO) particles were fabricated on treated magnesium AZ31 alloy. The effect of surface treatment of AZ31 using either oxidation or phosphating was much more effective than GO embedment on the corr...

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Bibliographic Details
Published in:Surface & coatings technology 2020-03, Vol.385, p.125395, Article 125395
Main Authors: Soliman, Hanaa, Qian, Junyu, Tang, Shuai, xian, Peng, Chen, Yingqi, Makhlouf, Abdel-Salam, Wan, Guojiang
Format: Article
Language:English
Subjects:
Anchoring
Chemical bonds
Coatings
Corrosion
Corrosion inhibitors
Corrosion prevention
Corrosion resistance
Graphene
Graphene oxide
Hydroxyquinoline
Magnesium alloys
Magnesium base alloys
Oxidation
Phosphating (coating)
Self healing materials
Self-healing
Surface treatment
X ray photoelectron spectroscopy
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Summary:The polymerized Hydroxyquinoline (HQ) coatings incorporated with corrosion inhibitor nano-Graphene Oxide (GO) particles were fabricated on treated magnesium AZ31 alloy. The effect of surface treatment of AZ31 using either oxidation or phosphating was much more effective than GO embedment on the corrosion resistance and self-healing functionality. Surface treatment prior to GO/HQ deposition plays a vital role in initiating more anchoring bonds between molecules to fasten any scratch healing. The anticorrosion behavior of the GO/HQ hybrid coating will be discussed in the light of SEM, XRD, XPS and FTIR analysis. [Display omitted] •Embedment of self-healing GO particles into HQ films upon AZ31had been demonstrated•HQ-GO/MgO/AZ31 film presented self-healing functionality plus anti-corrosion ability•AZ31 oxidation initiated anchoring bonds between GO and Mg to fasten scratch healing.•Carbonyl group (CO) and honeycomb-structure morphology are master keys for protection.
ISSN:0257-8972
1879-3347
DOI:10.1016/j.surfcoat.2020.125395