Quantitative characterization of material surface — Application to Ni + Mo electrolytic composite coatings

Kubisztal, Julian; Kubisztal, M.; Haneczok, G.

doi:10.1016/j.matchar.2016.10.015

Cited by 15 publications

(20 citation statements)

References 13 publications

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“…It was assumed that the Δ W interval was small enough, and the ρ( z i ) was approximated by a continuous function ρ( z ), for which a Gaussian form was assumed. The Gaussian function described by the equation below was used for approximation of each histogram [ 70 , 71 ]:

where A represents a constant of 1, σ is the standard deviation,

denotes the average value of the Gaussian distribution expectation, i.e., a location of the FW peak value, and σ 2 is the Gaussian distribution variance, i.e., a measure of the distribution width WF . The Gaussian distribution curves of the WF for the sandblasted Ti G4 before and after autoclaving are shown in Figure 12 .…”

Section: Resultsmentioning

confidence: 99%

Effect of Autoclaving Time on Corrosion Resistance of Sandblasted Ti G4 in Artificial Saliva

et al. 2020

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Titanium Grade 4 (Ti G4) is the most commonly used material for dental implants due to its excellent mechanical properties, chemical stability and biocompatibility. A thin, self-passive oxide layer with protective properties to corrosion is formed on its surface. However, the spontaneous TiO2 layer is chemically unstable. In this work, the impact of autoclaving time on corrosion resistance of Ti G4 in artificial saliva solution with pH = 7.4 at 37 °C was studied. Ti G4 was sandblasted with white Al2O3 particles and autoclaved for 30–120 min. SEM, EDS, 2D roughness profiles, confocal laser scanning microscopy, and a Kelvin scanning probe were used for the surface characterization of the Ti G4 under study. In vitro corrosion resistance tests were conducted using open circuit potential, polarization curves, and electrochemical impedance spectroscopy measurements. It was found that Sa parameter, electron work function, and thickness of the oxide layers, determined based on impedance measurements, increased after autoclaving. The capacitive behavior and high corrosion resistance of tested materials were revealed. The improvement in the corrosion resistance after autoclaving was due to the presence of oxide layers with high chemical stability. The optimal Ti G4 surface for dentistry can be obtained by sandblasting with Al2O3 with an average grain size of 53 µm, followed by autoclaving for 90 min.

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where A represents a constant of 1, σ is the standard deviation,

Section: Resultsmentioning

confidence: 99%

Effect of Autoclaving Time on Corrosion Resistance of Sandblasted Ti G4 in Artificial Saliva

et al. 2020

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“…Statistical analysis of the obtained maps allows determining parameters describing quantitatively the surface properties i.e. average (CPD av ) and root mean square (CPD q ) of contact potential difference [46][47][48]. It was stated that the C125/1173 coating (Figure 6a, Table 4) is characterized by the highest value of CPD av which equals c.a.…”

Section: Resultsmentioning

confidence: 99%

Corrosion Resistance of Heat-Treated Ni-W Alloy Coatings

et al. 2020

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The paper presents research on evaluation of corrosion resistance of Ni-W alloy coatings subjected to heat treatment. The corrosion resistance was tested in 5% NaCl solution by the use of potentiodynamic polarization technique and electrochemical impedance spectroscopy. Characteristics of the Ni-W coatings after heat treatment were carried out using scanning electron microscopy, scanning Kelvin probe technique and X-ray diffraction. Suggested reasons for the improvement of properties of the heat treated Ni-W coating, obtained at the lowest current density value (125 mA∙cm−2), are the highest tungsten content (c.a. 25 at.%) as well as the smallest and the most homogeneous electrochemically active surface area.

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“…The parameters that describe quantitatively the material surface topography, i.e., the arithmetic mean deviation ( S a ), maximum peak height ( S p ), maximum valley depth ( S v ), skewness ( S sk ), and excess kurtosis ( S ku ) were determined. The detailed description of the parameters can be found elsewhere [ 41 , 42 , 43 , 44 , 45 , 46 ].…”

Section: Methodsmentioning

confidence: 99%

Corrosion Resistance of the CpTi G2 Cellular Lattice with TPMS Architecture for Gas Diffusion Electrodes

et al. 2020

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The corrosion of materials used in the design of metal-air batteries may shorten their cycle life. Therefore, metal-based materials with enhanced electrochemical stability have attracted much attention. The purpose of this work was to determine the corrosion resistance of commercially pure titanium Grade 2 (CpTi G2) cellular lattice with the triply periodic minimal surfaces (TPMS) architecture of G80, D80, I-2Y80 in 0.1 M KOH solution saturated with oxygen at 25 °C. To produce CpTi G2 cellular lattices, selective laser melting technology was used which allowed us to obtain 3D cellular lattice structures with a controlled total porosity of 80%. For comparison, the bulk electrode was also investigated. SEM examination and statistical analysis of the surface topography maps of the CpTi G2 cellular lattices with the TPMS architecture revealed much more complex surface morphology compared to the bulk CpTi SLM. Corrosion resistance tests of the obtained materials were conducted using open circuit potential method, Tafel curves, anodic polarization curves, and electrochemical impedance spectroscopy. The highest corrosion resistance and the lowest material consumption per year were revealed for the CpTi G2 cellular lattice with TPMS architecture of G80, which can be proposed as promising material with increased corrosion resistance for gas diffusion in alkaline metal-air batteries.

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Quantitative characterization of material surface — Application to Ni + Mo electrolytic composite coatings

Cited by 15 publications

References 13 publications

Effect of Autoclaving Time on Corrosion Resistance of Sandblasted Ti G4 in Artificial Saliva

Effect of Autoclaving Time on Corrosion Resistance of Sandblasted Ti G4 in Artificial Saliva

Corrosion Resistance of Heat-Treated Ni-W Alloy Coatings

Corrosion Resistance of the CpTi G2 Cellular Lattice with TPMS Architecture for Gas Diffusion Electrodes

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