Journal
SURFACE & COATINGS TECHNOLOGY
Volume 437, Issue -, Pages -Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.surfcoat.2022.128354
Keywords
Magnesium alloys; Graphene oxide; Layered double hydroxides; Corrosion resistance; Wear reduction
Funding
- National Natural Science Foundation of China [52105176, 51709049]
- National Key Research and Development Program of China [2021YFB3400601]
- Program for Guangdong Introducing Innovative and Entrepreneurial Teams [2019TO2Z393]
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Zinc aluminum-layered double hydroxide (ZnAl-LDH) was grown in-situ on the low-pressure cold gas spraying (LPCGS) Al coating by hydrothermal method. The composite coating zinc aluminum-layered double hydroxide-Graphene oxide (LDH-G) was formed by electrostatic adsorption of graphene oxide (GO) and ZnAlLDH. LDH-G coating showed excellent reduction in wear and corrosion resistance, attributed to the good mechanical properties of graphene and the corrosion inhibition effect of ZnAl-LDH.
Zinc aluminum-layered double hydroxide (ZnAl-LDH) was grown in-situ on the low-pressure cold gas spraying (LPCGS) Al coating by hydrothermal method. Then the composite coating zinc aluminum-layered double hydroxide-Graphene oxide (LDH-G) was formed by electrostatic adsorption of graphene oxide (GO) and ZnAlLDH. The structure, morphology, and composition of the coating were studied. A rotational ball-on-disk tribometer (WTM-2E, China) was used to test the tribological properties of the LDH-G coating. The polarization curve and EIS measured the electrochemical properties of the LDH-G coating in 3.5 wt% NaCl solution. Due to the good mechanical properties of graphene and the corrosion inhibition effect of ZnAl-LDH, LDH-G showed an excellent reduction in wear and corrosion resistance.
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