Corrosion resistance property of the ceramic coating obtained through microarc oxidation on the AZ31 magnesium alloy surfaces

Effect of additives on structure and corrosion resistance of ceramic coatings on Mg–Li alloy by micro-arc oxidation

“…In our previous study, MAO was applied for the coating of Mg-Li alloy in Na 2 SiO 3 solution system, and it is found that further improvement of the corrosion resistance of the ceramic coating referred to the addition of additives. Indeed, similar results were found by some other researchers [13][14][15] that the coatings doped with glycerol, triethanolamine, Na 2 B 4 O 7 or Na 2 EDTA could improve the corrosion resistance and micro-hardness. Guo and An [16] and Abbasian et al [17] considered that many surfactants could be widely used as dispersing agents, wetting agents or foaming agents to inhibit the defect development or to improve the coating quality, which was in accordance with the interfacial tension modifying concept.…”

The Intersection of Design, Manufacturing, and Surface Engineering

“…186 The technique has been used to create microporous or "spongy" titanium surfaces for biomedical applications, 187 nanoporous "coral-like" titanium dioxide layers for catalytic applications, 188 creation of osseointegrative layers through post ASD exposure to calcium phosphate solutions for tooth implants, 189 barrier layers with high hardness on valve metals, 190 and corrosion-resistant multicomponent coatings for magnesium alloy surfaces. 191 In general, it is possible to achieve thick coatings quickly, with high microhardness, excellent adhesion, and improved wear and corrosion resistance using ASD (and related microarc methods). Problems with the technique can include difficulties in control of phases formed and composition (as the apparent heating would not be uniform), the need to use an aqueous electrochemical cell of some sort (limiting size and geometry), and the relatively high voltages used.…”

Corrosion resistance of Mg–Al-LDH coating on magnesium alloy AZ31

“…Therefore, an improvement in corrosion resistance is of critical importance for magnesium alloys. Numerous surface treatments have been adopted to enhance the corrosion resistance of magnesium alloys, including chemical conversion coatings [1][2][3], polymer coatings [4,5], microarc oxidation (MAO) or plasma electrolyte oxidation (PEO) coatings [6][7][8], and silane coatings [9,10]. Among these surface treatments, chemical conversion coatings have advantages, including lower cost and simplicity of operation [11].…”