Abstract
A particular dual-layer structure of reinforced anti-corrosion magnesium aluminum-layered double hydroxide - Zn-G/Ni coating (LDH-ZGN), grown in situ the magnesium aluminum-layered double hydroxide coating (LDH) on the surface of the magnesium alloy, and a Zn-G/Ni composite coating was deposited on the LDH coating by low-pressure cold gas spraying (LPCGS). The LDH-ZGN was characterized by XRD, XPS, SEM, EDS, etc. The coating's corrosion protection and enhancement effect were explored through the electrochemical test of polarization curve, EIS, and coating immersion test. LDH-ZGN exhibited excellent corrosion resistance, mainly attributed to the synergy between reduced graphene oxide (rGO) and magnesium aluminum-layered double hydroxides (MgAl-LDH) and the enhancement effect of the coating under the particular dual-layer structure. • Build a dual-layer structural coating on the surface of the Mg alloy. • The cooperation of MgAl-LDH and rGO improves corrosion resistance. • rGO and Ni synergistically enhance the protective effect of the LDH-ZGN coating.
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