Dopamine self-polymerized sol-gel coating for corrosion protection of AZ31 Mg Alloy

Anti-corrosion properties of bio-inspired surfaces: a systematic review of recent research developments

“…The mechanical properties of the selfhealing materials were effectively enhanced by using inorganic materials for toughening, carbon materials, and the introduction of a dual network structure. [65][66][67] Natural organisms exhibit remarkable self-healing abilities coupled with extraordinary mechanical strength, prompting researchers to delve into the structure and functions of these organisms. This exploration proves to be a highly rewarding endeavor.…”

Research advances on superhydrophobic coating for metal surfaces via one-step electrodeposition

“…For, instance, anodizing is an electrolytic process useful for a thick and compact oxide film on the metals or alloys, which is regarded as one of the most useful surface treatments on Mg in the past two decades. And electrodeposition (ED) is another process of dissolving metals into a solution, which effected by externally electric field (Li et al , 2023a, 2023b). Zhang et al (2019) fabricated super-hydrophobic surface on AZ91 and WE43 magnesium alloys by laser etching and micro-arc oxidation (MAO), and researched the relationship between corrosion resistance and the surface structure, pretreatment method and so on.…”

“…Zhang et al (2019) fabricated super-hydrophobic surface on AZ91 and WE43 magnesium alloys by laser etching and micro-arc oxidation (MAO), and researched the relationship between corrosion resistance and the surface structure, pretreatment method and so on. In addition to these common coating preparation methods, levodopa (DOPA) coating can be prepared by sol-gel method to modify the surface of magnesium alloy, which can still achieve a good anticorrosion protection effect (Li et al , 2023a, 2023b). These methods have greatly improved the corrosion resistance of magnesium alloys, but these methods still have a series of problems, such as low corrosion resistance and durability and poor mechanical properties.…”

“…AZ91 exhibits the uniform corrosion with the high corrosion rate. Besides, the corrosion product layer on AZ31 has the best compactness and corrosion resistance (Li et al, 2023a(Li et al, , 2023b. Therefore, the key to expanding the application of magnesium alloys is to improve the corrosion resistance of magnesium alloys.…”

Varied corrosion evolution behavior of pure Mg, AZ31 and AZ91 magnesium alloys in phosphate buffer solution

“…To control the CR in a suitable range, researchers have proposed different solutions, such as purification or alloying of Mg substrate (Sezer et al , 2018; Staiger et al , 2006), as well as the application of corrosion inhibitors (Feng et al , 2018) and surface protective coatings (Li et al , 2023; Agarwal et al , 2016; Li et al , 2023). As the impurity in Mg substrate can accelerate its anodic dissolution rate under micro-galvanic corrosion mechanism, the development of pure Mg with a higher purity is of interest recently.…”