Effect of KOH Concentration on the Microstructure and Electrochemical Properties of MAO-Coated Mg Alloy AZ31B

Fattah‐alhosseini, Arash; Joni, M. Sabaghi

doi:10.1007/s11665-015-1645-4

Cited by 44 publications

(5 citation statements)

References 79 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the increase in processing time, even stronger micro discharges and more intensive gas liberation were observed, but the number of sparks decreased, and the sparks became more widely spaced. This result is consistent with a previous study in the literature [16]. Journal of Materials Science and Chemical Engineering However, the discharge characteristics that we observed without electrolyte cooling were notably different from the above discussion.…”

Section: Three Discharge Stages Of Mao Processsupporting

confidence: 90%

Discharge Characteristic of Micro-Arc Oxidation on Aluminum Alloy under the Changing Electrolyte Temperature

Yang¹,

Wang²,

Zhu³

et al. 2022

MSCE

View full text Add to dashboard Cite

The electrolyte temperature has a great influence on the performance of the coating prepared by micro-arc oxidation (MAO). The behavior of MAO discharge in the changing electrolyte temperature has been investigated. Compared to constant electrolyte temperature in conventional MAO process, the process has different discharge characteristics under the changing electrolyte temperature. The amplitude of pulse voltage was detected to study the change of discharge characteristic under the constant-current control of MAO power supply. Three successive discharge stages were differentiated by the variable the pulse voltage versus process time. Since there were significant changes in the sound, the sound signals were acquired and the audio analysis was used to describe the changing of the MAO discharge at different stages. Optical emission spectroscopy (OES) was employed in situ to unveil how the micro-discharge changed with the temperature increasing. Scanning electron microscopy (SEM) was used to characterize the morphology of the coatings on 6N01 aluminum alloy prepared by normal process with the constant-temperature control of the MAO electrolyte and by the process under the changing electrolyte temperature. A mode of film growth and microdischarge was given to describe the effects of the changing electrolyte temperature in the whole MAO process.

show abstract

Section: Three Discharge Stages Of Mao Processsupporting

confidence: 90%

Discharge Characteristic of Micro-Arc Oxidation on Aluminum Alloy under the Changing Electrolyte Temperature

Yang¹,

Wang²,

Zhu³

et al. 2022

MSCE

View full text Add to dashboard Cite

show abstract

“…In acid electrolytes such as oxalic acid, sulfuric acid, and phosphoric acid, the rate of anodic film generation is substantially faster than the rate of dissolution for Ti6Al4V. The rate of anodic film generation for MgAZ31B, however, varies with the acid and base solutions, such as phosphoric acid (PhoA) and potassium hydroxide (KOH) solution (Fattah & Joni, 2015;Sul et al, 2001). The bare metal surface is layered with an anodic oxide surface that is corrosion-resistive, decorative, hard, and durable.…”

Section: Anodization Of Metallic Implantsmentioning

confidence: 99%

Geli̇şmi̇ş Korozyon Di̇renci̇ İçi̇n Eloksalli Metali̇k İmplantlarin Elektroki̇myasal Davranişlarinin İncelenmesi̇

MURAD

USTA

Asmatulu

et al. 2022

İstanbul Ticaret Üniversitesi Fen Bilimleri Dergisi

View full text Add to dashboard Cite

A study about long-term corrosion behavior of anodized and non-anodized Ti6Al4V and MgAZ31B biomaterials was conducted under controlled conditions. By applying 20V DC potential, MgAZ31B alloys was anodized in phosphoric acid and potassium hydroxide while Ti6Al4V alloys was anodized in phosphoric acid and oxalic acid. Long-term experiments were carried out by immersing them in deionized (DI) water, 3% NaCl and phosphate-buffered saline (PBS) solutions. The corrosion rate and pattern were measured by electrochemical analysis. Also, as a result of anodization, the natural oxide layer was observed on the material surface, thus the corrosion rate is reduced and the life of the biomaterial has been improved.

show abstract

“…In addition, Mg has indicated great biocompatibility that has made it as an attractive metal used in medical implants [6]. Nevertheless, Mg and its alloys have a low corrosion resistance which is a critical disadvantage and limits many application domains when compared to other structural materials, such as steels, Al, and Ti alloys [7][8][9][10][11].…”

Section: Introductionmentioning

confidence: 99%

Corrosion, Wear, and Antibacterial Behaviors of Hydroxyapatite/MgO Composite PEO Coatings on AZ31 Mg Alloy by Incorporation of TiO2 Nanoparticles

et al. 2022

View full text Add to dashboard Cite

Plasma electrolytic oxidation (PEO) is a promising surface treatment for generating a thick, adherent coating on valve metals using an environmentally friendly alkaline electrolyte. In this study, the PEO method was used to modify the surface of AZ31 Mg alloy. The composite coatings were formed in a phosphate-based electrolyte containing hydroxyapatite nanoparticles (NPs) and different concentrations (1, 2, 3, and 4 g/L) of TiO2 NPs. The results showed that the incorporation of TiO2 NPs in the composite coatings increased the porosity, coating thickness, surface roughness, and surface wettability of the coatings. The corrosion-resistance results of coatings in simulated body fluid (SBF) were tested for up to 72 h and all coatings showed superior corrosion resistance compared to the bare substrate. Among samples containing TiO2, the sample containing 1 g/L TiO2 had the highest inner layer resistance (0.51 kΩ·cm2) and outer resistance (285 kΩ·cm2) and the lowest average friction coefficient (395.5), so it had the best wear and corrosion resistance performance. The antibacterial tests showed that the higher the concentration of TiO2 NPs, the lower the adhesion of bacteria, resulting in enhanced antibacterial properties against S. aureus. The addition of 4 g/L of TiO2 NPs to the electrolyte provided an antibacterial rate of 97.65% for the coating.

show abstract

Effect of KOH Concentration on the Microstructure and Electrochemical Properties of MAO-Coated Mg Alloy AZ31B

Cited by 44 publications

References 79 publications

Discharge Characteristic of Micro-Arc Oxidation on Aluminum Alloy under the Changing Electrolyte Temperature

Discharge Characteristic of Micro-Arc Oxidation on Aluminum Alloy under the Changing Electrolyte Temperature

Geli̇şmi̇ş Korozyon Di̇renci̇ İçi̇n Eloksalli Metali̇k İmplantlarin Elektroki̇myasal Davranişlarinin İncelenmesi̇

Corrosion, Wear, and Antibacterial Behaviors of Hydroxyapatite/MgO Composite PEO Coatings on AZ31 Mg Alloy by Incorporation of TiO2 Nanoparticles

Contact Info

Product

Resources

About