The current study investigates the corrosion properties of Micro Arc Oxidized (MAO) AZ31 alloy and its weldments. Autogenous full penetration bead-on-plate GTA welds were made under alternating current mode. Uniform oxide layer was developed on the
Corrosion resistance and mechanism of micro-nano structure super-hydrophobic surface prepared by laser etching combined with coating process Qianqian Zhang, Huichen Zhang. The purpose of this paper is to evaluate the effect of micro-nano mixed super-hydrophobic structure on corrosion resistance and mechanism of magnesium alloys. Corrosion Resistance of Micro-Arc Oxidation/Graphene The wettability of the micro-nano Ni film varied from super-hydrophilicity (water contact angle 5.3°) to super-hydrophobicity (water contact angle 155.7°) by exposing the surface in air at room temp. The corrosion resistance of the super-hydrophobic film was estd. by electrochem. impedance spectroscopy (EIS) and Tafel polarization measurements.
Poor corrosion and wear resistance of magnesium (Mg) alloys restrict their applications. Herein, corrosion and wear-resistant films are formed upon Mg alloy AZ31 through a micro-arc oxidation (MAO) process in silicate electrolyte in the presence of carbon spheres (CS). Surface morphology, chemical composition, corrosion resistance, hardness, and coefficient of friction (CoF) of the MAO Effect of CeO2 on Corrosion Resistance of High-Current The improvement in corrosion resistance can be attributed to the following points:after adding rare-earth elements, the micro-structure of the alloy surface improves, the surface is relatively dense and flat, and the corrosive liquid is insulated from the substrate, which is beneficial to reducing pitting corrosion of the alloy surface and improves the passivation performance of the alloy . Rare-earth elements not
Jan 01, 2019 · Microstructure and Corrosion Resistance of SiC Nanoparticles Reinforced Ceramic Composite Coating on Mg-Li Based Composite by Micro-Arc Oxidation Chen, Zihan Bao, Chonggao Preparation and Biocompatibility of Corrosion-Resistant Jun 06, 2019 · The results showed that the TC4 composite micro-nano structure with NDTF has strong corrosion resistance. At a test voltage of 1.8 V, TC4-NDTF can produce a current intensity of 4.8 A/cm 2; the proliferation rate of mouse osteoblasts was maintained at 80%, and the apoptosis rate of mouse osteoblasts was less than 10%.
Jun 21, 2021 · Both the immersion and electrochemical tests showed the coating formed at 160 mA/cm 2 had the best corrosion resistance with the highest corrosion potential ( 1.16 V), the minimum corrosion current density (1.68 × 10 6 A·cm 2), and the maximum polarization resistance (1.07 × 10 7 ·cm 2).