Effect of alkali/acid pretreatment on the topography and corrosion resistance of as-deposited CaP coating on magnesium alloys

Song, Jian; Cai, Shu; Lin, Yishu; Bao, Xiaogang; Ling, Rui; Xie, Dongli; Sun, Jia; Wei, Jieling; Xu, Guohua

doi:10.1016/j.jallcom.2019.04.198

Cited by 54 publications

(19 citation statements)

References 38 publications

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“…Wang et al [ 106 ] synthesized a film on ZE21B alloy via an alkali-heat method (AH; an essential measure of Mg-based materials for removing oil and other impurities that forms a hydroxide film for better corrosion resistance [ 68 , 107 ]), the specific step of which consisted in immersing the Mg alloy into a 5 M boiled NaOH solution for 3 h. Unfortunately, the results demonstrated that the AH-treated ZE21B exhibited high cytotoxicity, which may have been caused by the large amount of Mg 2+ released and the over alkali pH value [ 108 ]. Moreover, the Cl − ion in the solution can decompose the Mg(OH) 2 film and convert it into soluble magnesium chloride (MgCl 2 ).…”

Section: Surface Modification Of Mg Alloy Stentsmentioning

confidence: 99%

Advances in coatings on magnesium alloys for cardiovascular stents – A review

Zhang

Yang

et al. 2021

Bioactive Materials

105

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Magnesium (Mg) and its alloys, as potential biodegradable materials, have drawn wide attention in the cardiovascular stent field because of their appropriate mechanical properties and biocompatibility. Nevertheless, the occurrence of thrombosis, inflammation, and restenosis of implanted Mg alloy stents caused by their poor corrosion resistance and insufficient endothelialization restrains their anticipated clinical applications. Numerous surface treatment tactics have mainly striven to modify the Mg alloy for inhibiting its degradation rate and enduing it with biological functionality. This review focuses on highlighting and summarizing the latest research progress in functionalized coatings on Mg alloys for cardiovascular stents over the last decade, regarding preparation strategies for metal oxide, metal hydroxide, inorganic nonmetallic, polymer, and their composite coatings; and the performance of these strategies in regulating degradation behavior and biofunction. Potential research direction is also concisely discussed to help guide biological functionalized strategies and inspire further innovations. It is hoped that this review can give assistance to the surface modification of cardiovascular Mg-based stents and promote future advancements in this emerging research field.

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Section: Surface Modification Of Mg Alloy Stentsmentioning

confidence: 99%

Advances in coatings on magnesium alloys for cardiovascular stents – A review

Zhang

Yang

et al. 2021

Bioactive Materials

105

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“…NaOH and ZnSO 4 as accelerators were added to phosphatizing baths, with an aim to form a dense and uniform protective phosphate coating. It Types of protective coatings used to delay/reduce the degradation rate of magnesium alloys [68][69][70][71][72][73][74][75][76][77].…”

Section: Methods Of Reducing the Degradation Rate Of Magnesium Alloysmentioning

confidence: 99%

Amorphous and Crystalline Magnesium Alloys for Biomedical Applications

Cesarz-Andraczke¹,

Kania²,

Młynarek³

et al. 2022

Magnesium Alloys Structure and Properties

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Amorphous and crystalline magnesium alloys, developed for medical applications – especially implantology – present the characteristics of biocompatible magnesium alloys (Mg-Zn, Mg-Zn-Ca, Mg-Ca etc.). This chapter provides a brief description of the role of magnesium in the human body and the use of Mg in medicine. It presents the concept of using magnesium alloys in medicine (advantages and limitations) and the scope of their potential applications (orthopedic implantology, cardiac surgery etc.). The chapter shows classification of magnesium alloys as potential biomaterials, due to their structure (amorphous, crystalline) and alloying elements (rare earth elements, noble metals etc.). The mechanism and in vitro degradation behavior of magnesium alloys with amorphous and crystalline structures are described. The chapter also discusses the influence of alloying elements (rare earth elements, noble metals) on the in vitro degradation process. It also presents the methods of reducing the degradation rate of magnesium alloys by modifying their surface (application of protective layers).

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“…The A-A samples showed weight gain after 28 days of immersion indicating deposition of some phases as a result of better biomineralization. The improvement in biomineralization of A-A samples is attributed to the clean and stable surface obtained through acid treatment [40,41]. The stable surface with magnesium acetate layer acted as a scaffold for nucleation and growth of CaP through biomineralization.…”

Section: Immersion Test 341 In Vitro Biomineralizationmentioning

confidence: 98%

Tailoring biomineralization and biodegradation of Mg–Ca alloy by acetic acid pickling

Rahim

Joseph

Hanas

2020

Mater. Res. Express

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Magnesium and its alloys are suitable candidates for developing biodegradable metallic implants. However, the rapid degradation of these alloys in the physiological environment is a major limitation for such applications. In this work, Mg-Ca alloy was chemically treated with acetic acid and its effects on degradation behaviour were studied using simulated body fluid (SBF). The surface morphology and composition of the acid pickled samples were investigated using a scanning electron microscope (SEM) and infrared spectroscopy (IR). The degradation rate was analysed by conducting potentiodynamic polarization (PDP) and immersion tests. The results show that optimum acetic acid treatment improved the corrosion resistance by acid etching and formation of magnesium acetate layer. The treated samples also exhibited enhanced biomineralization and developed calcium phosphate layer on the surfaces during immersion tests. It is proposed that acetic acid pickling can be used as a reliable technique for surface modification as well as for pre-treatment of magnesium alloys to make them suitable for degradable metallic implant applications.

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Effect of alkali/acid pretreatment on the topography and corrosion resistance of as-deposited CaP coating on magnesium alloys

Cited by 54 publications

References 38 publications

Advances in coatings on magnesium alloys for cardiovascular stents – A review

Advances in coatings on magnesium alloys for cardiovascular stents – A review

Amorphous and Crystalline Magnesium Alloys for Biomedical Applications

Tailoring biomineralization and biodegradation of Mg–Ca alloy by acetic acid pickling

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