Corrosion Protection and Surface Treatment of Magnesium Alloys Used for Orthopedic Applications

Nassif, Nabil; Ghayad, Ibrahim M.

doi:10.1155/2013/532896

Cited by 45 publications

(25 citation statements)

References 165 publications

(200 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For instance, rate of metal corrosion can be slowed down by direct and electrochemical applications of surface coatings (Ohtsuka, 2012;Nassif and Ghayad, 2013), use of corrosion inhibitors (Antonijevic and Petrovic, 2008;Dar, 2011;Kesavan et al, 2012), and cathodic protection (Jayapalan et al, 2014). Among the various methods available for corrosion control and protection, the use of corrosion inhibitors is the most popular because the approach is cheap and easy to operate (Dar, 2011;Singh et al, 2013).…”

Section: = Coefficients Of Determination; T = Period Of Immersion (Inmentioning

confidence: 99%

Inhibitory Effect of African Pumpkin (<i>Momordica balsamina</i> Linn.) Leaf Extract on Copper Corrosion in Acidic Media

Maibulangu¹,

Ibrahim²,

Akinola³

2017

Journal of Applied Sciences and Environmental Management

View full text Add to dashboard Cite

Inhibition of copper corrosion in acidic medium by ethanolic extract of Momordica balsamina leaves was investigated. Findings reveal that the rate of copper corrosion increases with increasing temperature of the medium but decreases as the concentration of the Momordica balsamina extract added to the medium increases. Examination of the surface morphology of copper using Scanning Electron Microscopy (SEM) also reveals that while the surface of copper was seriously damaged in acidic solution in the absence of Momordica balsamina extract, addition of 0.8 of the extract significantly protected the copper surface from corrosion. Results obtained from adsorption and thermodynamic studies reveal that the adsorption of the inhibitor on the surface of the copper metal fitted well to both Freundlich ( ≥ 0.948) and Temkin ( ≥ 0.940) adsorption models and the low values of activation energies obtained ( ≤ 34.02 ) indicate that the adsorption of the inhibitor on the copper surface favors the mechanism of physical adsorption. Negative signs of obtained in the study suggest that the adsorption of Momordica balsamina on the copper metal is thermodynamically favorable. The data obtained in this study demonstrate that extract of Momordica balsamina leaves probably contains one or more chemical species that protect copper against corrosion through the mechanism of physical adsorption. © JASEM https://dx.doi.org/10.4314/jasem.v21i6.12

show abstract

Section: = Coefficients Of Determination; T = Period Of Immersion (Inmentioning

confidence: 99%

Inhibitory Effect of African Pumpkin (<i>Momordica balsamina</i> Linn.) Leaf Extract on Copper Corrosion in Acidic Media

Maibulangu¹,

Ibrahim²,

Akinola³

2017

Journal of Applied Sciences and Environmental Management

View full text Add to dashboard Cite

show abstract

“…According to the literature, the presence of SiO 3 2− in the electrolyte solution is due to the dissolution of Na 2 SiO 3 in water, which occurs according to Reaction 2. It is converted into Si(OH) 4 as a result of being hydrolyzed by water according to Reaction 3, and eventually converted into SiO 2 as a result of applying a strong electric field and anodizing procedure at a high temperature (Reaction 4) [37,39]:…”

Section: Resultsmentioning

confidence: 99%

Applying Baghdadite/PCL/Chitosan Nanocomposite Coating on AZ91 Magnesium Alloy to Improve Corrosion Behavior, Bioactivity, and Biodegradability

et al. 2019

View full text Add to dashboard Cite

Magnesium alloys have received a great amount of attention regarding being used in biomedical applications; however, they show high degradability, poor bioactivity, and biocompatibility. To improve these properties, surface modification and various types of coatings have been applied. In this study, an anodized AZ91 alloy was coated with a polymer matrix composite made of polycaprolactone/chitosan (PCL/Ch) with different percentages of baghdadite to improve its resistance to corrosion, bioactivity, and biocompatibility. The effects of different percentages of baghdadite (0 wt %, 1 wt %, 3 wt %, and 5 wt %) on the surface microstructure, corrosion resistance, roughness, and wettability were evaluated. The results indicated that the applied nano-polymer-ceramic coating including 3 wt % baghdadite was hydrophobic, which consequently increased the corrosion resistance and decreased the corrosion current density of the anodized AZ91 alloy. Coating with 3 wt % baghdadite increased the roughness of AZ91 from 0.329 ± 0.02 to 7.026 ± 0.31 μm. After applying the polymer-ceramic coating on the surface of anodized AZ91, the corrosion products changed into calcium–phosphate compounds instead of Mg(OH)2, which is more stable in a physiological environment.

show abstract

“…Mg or its alloy has a unique electrochemical characteristic leading to low corrosion resistance. Studies show that Mg-based implants exhibit improved biocompatibility and corrosion resistance and can accelerate the generation of a hard callous at fractured sites [ 45 ]. As compared to traditional biopolymer based implants, they offer higher mechanical strength, as close as the bone’s strength.…”

Section: Properties Of Mg/mg-based Alloysmentioning

confidence: 99%

“…CaP coating was also shown to be beneficial for biocompatibility. However, the CaP layer formed on Mg–Ca alloy surface was an amorphous mixed (Mg, Ca)-phosphate which can be carbonated and hydrated [ 45 ].…”

Section: Surface Treatments For the Control Of Corrosion Ratementioning

confidence: 99%

“…Though the process is mainly concerned with the deposition of inorganic phases, the coating produced can be achieved via both purely deposition and, to some extent, the conversion at the interface. It has the capability of forming uniform coatings, controllability of maintaining the required thickness and chemical composition of the coating, and most importantly, low deposition temperature [ 45 ]. Cathodic ED, a traditional process, is commonly used to deposit CaP based on coatings.…”

Section: Surface Treatments For the Control Of Corrosion Ratementioning

confidence: 99%

See 1 more Smart Citation

Surface treatments for controlling corrosion rate of biodegradable Mg and Mg-based alloy implants

Uddin

Hall

Murphy

2015

Science and Technology of Advanced Materials

142

View full text Add to dashboard Cite

Due to their excellent biodegradability characteristics, Mg and Mg-based alloys have become an emerging material in biomedical implants, notably for repair of bone as well as coronary arterial stents. However, the main problem with Mg-based alloys is their rapid corrosion in aggressive environments such as human bodily fluids. Previously, many approaches such as control of alloying materials, composition and surface treatments, have been attempted to regulate the corrosion rate. This article presents a comprehensive review of recent research focusing on surface treatment techniques utilised to control the corrosion rate and surface integrity of Mg-based alloys in both in vitro and in vivo environments. Surface treatments generally involve the controlled deposition of thin film coatings using various coating processes, and mechanical surfacing such as machining, deep rolling or low plasticity burnishing. The aim is to either make a protective thin layer of a material or to change the micro-structure and mechanical properties at the surface and sub-surface levels, which will prevent rapid corrosion and thus delay the degradation of the alloys. We have organised the review of past works on coatings by categorising the coatings into two classes—conversion and deposition coatings—while works on mechanical treatments are reviewed based on the tool-based processes which affect the sub-surface microstructure and mechanical properties of the material. Various types of coatings and their processing techniques under two classes of coating and mechanical treatment approaches have been analysed and discussed to investigate their impact on the corrosion performance, biomechanical integrity, biocompatibility and cell viability. Potential challenges and future directions in designing and developing the improved biodegradable Mg/Mg-based alloy implants were addressed and discussed. The literature reveals that no solutions are yet complete and hence new and innovative approaches are required to leverage the benefit of Mg-based alloys. Hybrid treatments combining innovative biomimetic coating and mechanical processing would be regarded as a potentially promising way to tackle the corrosion problem. Synergetic cutting-burnishing integrated with cryogenic cooling may be another encouraging approach in this regard. More studies focusing on rigorous testing, evaluation and characterisation are needed to assess the efficacy of the methods.

show abstract

Corrosion Protection and Surface Treatment of Magnesium Alloys Used for Orthopedic Applications

Cited by 45 publications

References 165 publications

Inhibitory Effect of African Pumpkin (<i>Momordica balsamina</i> Linn.) Leaf Extract on Copper Corrosion in Acidic Media

Inhibitory Effect of African Pumpkin (<i>Momordica balsamina</i> Linn.) Leaf Extract on Copper Corrosion in Acidic Media

Applying Baghdadite/PCL/Chitosan Nanocomposite Coating on AZ91 Magnesium Alloy to Improve Corrosion Behavior, Bioactivity, and Biodegradability

Surface treatments for controlling corrosion rate of biodegradable Mg and Mg-based alloy implants

Contact Info

Product

Resources

About