Effect of roughness on electrochemical and pitting corrosion of Ti-6Al-4V alloy in 12 wt.% HCl solution at 35 °C

Chi, Guangfang; Yi, Danqing; Liu, Huiqun

doi:10.1016/j.jmrt.2019.11.044

Cited by 73 publications

(33 citation statements)

References 58 publications

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“…The impedance characteristics (Figures 6 and 7) indicate that, regardless of the surface roughness of samples, compared to MQL, under dry conditions, surfaces were characterized by a greater resistance and an almost capacitive response, illustrated by a phase angle close to −80° recorded in a wide frequency range by control systems including in the range of 10 −1 -10 3 Hz, indicating the presence of a passive layer on the processed surface. The test results for the anodized titanium alloy Ti4Al4V reported in the literature show a similar characteristic [12,37,39]. In the Niquist illustration, samples after turning under MQL conditions were Spherical precipitates unevenly covering the surface of the samples were observed for samples after turning under dry and MQL conditions.…”

Section: Resultssupporting

confidence: 68%

“…In the Niquist illustration, samples after turning under MQL conditions were characterized by one loop (Figure 7b); when compared to samples with R amax , higher resistance values were recorded for samples with R amin . It is reported in the literature that, in the case of polished samples, larger diameters of the loops are observed, which are evidence of a higher resistance [12]. For samples with R amax , the lowest resistance occurred 7 days after immersion in SBF solution.…”

Section: Resultsmentioning

confidence: 85%

“…This is related to the characteristic post-treatment changes present on the surface, which contribute to the formation of corrosion foci [11]. The surface roughness of titanium alloys for both medical and other industries depends on the type and conditions of the treatment it is subjected to [12]. Although titanium alloy Ti6Al4V shows very good mechanical properties and is a widely known material used in industry, it belongs to the group of materials that are difficult to process [13,14].…”

Section: Introductionmentioning

confidence: 99%

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Corrosion Resistance and Surface Bioactivity of Ti6Al4V Alloy after Finish Turning under Ecological Cutting Conditions

et al. 2021

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The influence of cooling conditions and surface topography after finish turning of Ti6Al4V titanium alloy on corrosion resistance and surface bioactivity was analyzed. The samples were machined under dry and minimum quantity lubrication (MQL) conditions to obtain different surface roughness. The surface topographies of the processed samples were assessed and measured using an optical profilometer. The produced samples were subjected to electrochemical impedance spectroscopy (EIS) and corrosion potential tests (Ecorr) in the presence of simulated body fluid (SBF). The surface bioactivity of the samples was assessed on the basis of images from scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS) analysis. The inspection of the surfaces of samples after turning under dry and MQL conditions revealed unevenly distributed precipitation of hydroxyapatite compounds (Ca/P) with a molar ratio in the range of 1.73–1.97. Regardless of the cutting conditions and surface roughness, the highest values of Ecorr ~0 mV were recorded on day 7 of immersion in the SBF solution. The impedance characteristics showed that, compared to the MQL conditions, surfaces machined under dry conditions were characterized by greater resistance and the presence of a passive layer on the processed surface. The main novelty of the paper is the study of the effect of ecological machining conditions, namely, dry and MQL cutting on the corrosion resistance and surface bioactivity of Ti6Al4V titanium alloy after finish turning. The obtained research results have practical significance. They can be used by engineers during the development of technological processes for medical devices made of Ti6Al4V alloy to obtain favorable functional properties of these devices.

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Section: Resultssupporting

confidence: 68%

Section: Resultsmentioning

confidence: 85%

Section: Introductionmentioning

confidence: 99%

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Corrosion Resistance and Surface Bioactivity of Ti6Al4V Alloy after Finish Turning under Ecological Cutting Conditions

et al. 2021

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“…The decreased corrosion behavior of microblasted Ti6Al4V samples can be attributed to the higher roughness of the surface. A higher corrosion resistance related to lower surface roughness has been reported for Ti6Al4V but also for other metals and alloys, such as cp-Ti and NiTi [29,[32][33][34]. The higher passive current densities in microblasted Ti samples can be attributed to the true surface area, which increases with roughness.…”

Section: Discussionmentioning

confidence: 86%

Corrosion Behavior of Surface-Treated Metallic Implant Materials

et al. 2020

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Corrosion of taper connections in total hip arthroplasty remains of concern, as particles and ions generated by corrosive processes can cause clinical problems such as periprosthetic osteolysis or adverse reaction to metallic debris. Mechanical surface treatments that introduce compressive residual stresses (RSs) in metallic materials can lead to a better performance in terms of fretting and fatigue and may lower the susceptibility to corrosion. The study investigates the impact of mechanical surface treatments on the corrosion behavior of metallic biomaterials. Compressive RSs were introduced by deep rolling and microblasting in Ti6Al4V and CoCrMo samples. Polished samples served as reference. Corrosion behavior was characterized by repeated anodic polarization. Residual stresses of up to about −900 MPa were introduced by deep rolling with a reach in depth of approximately 500 µm. Microblasting led to compressive RSs up to approximately −800 and −600 MPa for Ti6Al4V and CoCrMo, respectively, in the immediate vicinity of the surface. For Ti6Al4V, microblasting resulted in decreased corrosion resistance with lower breakdown potentials and/or increased passive current densities in comparison to the polished and deep-rolled samples. The corrosion behavior of CoCrMo on the other hand was not affected by the mechanical surface treatments.

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“…The roughness of the CrN single-layer coating was 13.4 nm more than the 11.1 nm of Cr/CrN nanolayered coating. The degree of roughness for the coatings depends on different factors including substrate roughness, deposition conditions and so on that affect the properties of the coating, such as electrochemical corrosion behavior, 39 adhesion strength, and tribological behavior. , the peak appears corresponds to the (200) CrN phase that also corresponds to the background phase (γ).…”

Section: Morphology and Surface Topographymentioning

confidence: 99%

Comparison of electrochemical behavior of CrN single‐layer coating and Cr/CrN nanolayered coating produced by cathodic arc evaporation physical vapor deposition

Jasempoor

Elmkhah

Imantalab

et al. 2022

Int J Applied Ceramic Tech

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The aim of the present work is to study the CrN single‐layer coating and the Cr/CrN nanolayered coating by cathodic arc evaporation physical vapor deposition (CAE‐PVD) on AISI 304 stainless steel and to assess the electrochemical behavior of the coatings. Field emission scanning electron microscopy (FE‐SEM) and X‐ray diffraction (XRD) were utilized to study the morphology and microstructure of the coatings. The mechanical behavior of the coatings was studied by the nanoindentation technique. The electrochemical behavior of the formed coatings in 3.5 wt.% NaCl solution was investigated via electrochemical impedance spectroscopy (EIS) and potentiodynamic polarization (PDP) tests. Based on the microscopic images, it was realized that both CrN and Cr/CrN coatings were formed having a dense structure on the substrate. The results of EIS measurements showed gradual changes in the polarization resistance of the Cr/CrN nanolayered coating during the immersion time. However, significant changes in the polarization resistance of the CrN single‐layer coating were seen by increasing immersion time comparing with the Cr/CrN coating. The higher polarization resistance of the Cr/CrN coating can be attributed to the effects of the interface between the layers in comparison to the CrN coating.

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Effect of roughness on electrochemical and pitting corrosion of Ti-6Al-4V alloy in 12 wt.% HCl solution at 35 °C

Cited by 73 publications

References 58 publications

Corrosion Resistance and Surface Bioactivity of Ti6Al4V Alloy after Finish Turning under Ecological Cutting Conditions

Corrosion Resistance and Surface Bioactivity of Ti6Al4V Alloy after Finish Turning under Ecological Cutting Conditions

Corrosion Behavior of Surface-Treated Metallic Implant Materials

Comparison of electrochemical behavior of CrN single‐layer coating and Cr/CrN nanolayered coating produced by cathodic arc evaporation physical vapor deposition

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Effect of roughness on electrochemical and pitting corrosion of Ti-6Al-4V alloy in 12 wt.% HCl solution at 35 °C

Cited by 73 publications

References 58 publications

Corrosion Resistance and Surface Bioactivity of Ti6Al4V Alloy after Finish Turning under Ecological Cutting Conditions

Corrosion Resistance and Surface Bioactivity of Ti6Al4V Alloy after Finish Turning under Ecological Cutting Conditions

Corrosion Behavior of Surface-Treated Metallic Implant Materials

Comparison of electrochemical behavior of CrN single‐layer coating and Cr/CrN nanolayered coating produced by cathodic arc evaporation physical vapor deposition

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Effect of roughness on electrochemical and pitting corrosion of Ti-6Al-4V alloy in 12 wt.% HCl solution at 35 °C