Effect of Zn content on the chemical conversion treatments of AZ91D magnesium alloy

Corrosion Resistance of AZ91 Mg Alloy Modified by High-Current Pulsed Electron Beam

“…The a-Mg dissolves as anodes in such micro-cells. The corrosion process can be expressed by these following equations [12]:…”

“…There are two ways to improve its corrosion resistance: Firstly, alloying design and plastic deformation [7][8][9][10] as well as heat treatment [11] are applied to weaken the galvanic corrosion and promote the formation of a compact and stable surface or passive film on the surface of Mg alloys. Secondly, surface modification like chemical conversion treatment [12,13], sol-gel method [14,15] and micro-arc oxidation [16] was widely used to improve the anti-corrosive performance of Mg and its alloys.…”

Surface modification of magnesium and its alloys for biomedical applications

“…Deposition of phosphate conversion coatings has been explored by many researchers as a surface modification method to improve the corrosion resistance of Mg and its alloys (Hu, Meng, Chen, & Wang, 2012;Li, Lian, Niu, & Jiang, 2006; Van Phuong, Lee, Chang, Kim et al, 2013;Xu, Zhang, & Yang, 2009). Deposition of a Zn phosphate coating is one of the most well-studied systems and was recently reviewed by Van Phuong, Lee, Chang, Kim et al (2013).…”

“…Deposition of a Zn phosphate coating is one of the most well-studied systems and was recently reviewed by Van Phuong, Lee, Chang, Kim et al (2013). Being a conversion coating, the resultant phosphate coating is porous in nature, which limits its fullest potential in improving the corrosion resistance of Mg alloys (Hu et al, 2012;Li et al, 2006 (Chen, Birbilis, & Abbott, 2011;Wang, Huang et al, 2013). Being a conversion coating, the resultant phosphate coating is porous in nature, which limits its fullest potential in improving the corrosion resistance of Mg alloys (Hu et al, 2012;Li et al, 2006 (Chen, Birbilis, & Abbott, 2011;Wang, Huang et al, 2013).…”

Improving Corrosion Resistance and Biocompatibility of Magnesium Alloy by Sodium Hydroxide and Hydrofluoric Acid Treatments

“…Accordingly, surface modification has been one of the most important and effective methods to improve the corrosion resistance and the biocompatibility [9]. To date, numerous surface modification techniques have been developed to improve the biocompatibility and the corrosion resistance of the magnesium-based alloys, including surface alloying [10], surface chemical treatment [11], fabrication of surface coating [12], plasma treatment [13], self-assembly [14], micro-arc oxidation [15], anodization [16], plasma electrolytic oxidation [17], etc. In addition, a recent study reported that a hybrid materials of poly (ether imide) (PEI)-silica nanoparticles can be coated on the Mg surface to improve the corrosion stability and implant-tissue interfaces of magnesium substrates [18], and the results indicated that the content of silica can modulate the corrosion rate and biocompatibility and the authors stated that the hybrid systems have significant potential as a coating material of Mg for load-bearing orthopedic applications.…”