Effects of pH and Elevated Glucose Levels on the Electrochemical Behavior of Dental Implants

Implant failure is more likely to occur in persons with medically compromising systemic conditions, such as diabetes related to high blood glucose levels and inflammatory diseases related to pH levels lower than those in healthy people. The aim of this study was to investigate the effects of lower pH level and simulated- hyperglycemia on implant corrosion as these effects are critical to biocompatibility and osseointegration. The electrochemical corrosion properties of titanium implants were studied in four different solutions: Ringer's physiological solution at pH = 7.0 and pH = 5.5 and Ringer's physiological solution containing 15 mM dextrose at pH = 7 and pH = 5.5. Corrosion behaviors of dental implants were determined by cyclic polarization test and electrochemical impedance spectroscopy. Surface alterations were studied using a scanning electron microscope. All test electrolytes led to apparent differences in corrosion behavior of the implants. The implants under conditions of test exhibited statistically significant increases in Icorr from 0.2372 to 1.007 μAcm−2, corrosion rates from 1.904 to 8.085 mpy, and a decrease in polarization resistances from 304 to 74 Ω. Implants in dextrose-containing solutions were more prone to corrosion than those in Ringer's solutions alone. Increasing the acidity also yielded greater corrosion rates for the dextrose-containing solutions and the solutions without dextrose.

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Impact Of Strain In Drawing Process And Surface Modification On Resistance To Electrochemical Corrosion Of Wires Used In Dentistry

Archives of Metallurgy and Materials ◽

10.1515/amm-2015-0318 ◽

2015 ◽

Vol 60 (3) ◽

pp. 1865-1870

Author(s):

J. Przondziono ◽

E. Hadasik ◽

W. Walke ◽

J. Szala

Keyword(s):

Surface Modification ◽

Electrochemical Impedance ◽

Artificial Saliva ◽

Maxillofacial Surgery ◽

Electrochemical Corrosion ◽

Sudden Increase ◽

Drawing Process ◽

Corrosion Properties ◽

The Impact ◽

Modification Treatment

Abstract The study presents the results of research into the impact of strain in cold drawing and surface modification treatment on corrosion properties of wires made of X10CrNi 18-8 steel used in maxillofacial surgery. Scanning microscopy enabled to make images of the surface of wires after drawing process as well as after surface modification treatment. Resistance to electrochemical corrosion was evaluated on the ground of registered anodic polarisation curves in artificial saliva. In order to evaluate physical and chemical properties of the surface, electrochemical impedance spectroscopy was performed. Test results show deterioration of corrosion properties of wires along with strain taking place in drawing process. It was proved that electrochemical polishing and chemical passivation caused sudden increase of resistance of wires made of stainless steel to pitting corrosion in artificial saliva.

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EIS Research of AW-7020 Alloy Joints Welded by FSW

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.199.412 ◽

2013 ◽

Vol 199 ◽

pp. 412-417 ◽

Cited By ~ 2

Author(s):

Krzysztof Dudzik ◽

Adam Charchalis

Keyword(s):

Aluminum Alloy ◽

Electrochemical Impedance Spectroscopy ◽

Friction Stir Welding ◽

Impedance Spectroscopy ◽

Electrochemical Impedance ◽

New Technology ◽

Electrochemical Corrosion ◽

Signal Amplitude ◽

Corrosion Properties ◽

Friction Stir

The results of corrosion properties research of aluminum alloy AW 7020 (AlZn5Mg1) welded by friction stir welding FSW were presented. Friction Stir Welding (FSW) a new technology can be successfully used for butt welding of different types of aluminum alloy sheets. In the article the parameters for friction stir welding of sheets made of AlZn5Mg1 (7020) alloy was presented. The study was carried out in accordance with the requirements of the ASTM G 106. EIS measurement was performed in three electrode system in an artificial seawater (3.5% NaCl). Impedance studies were carried out at the corrosion potential. Changed voltage signal amplitude in the range ± 10 mV and frequency range of changes was as follows: 100 kHz - 0.1 Hz. Atlas 0531 EU & IA potentiostat was used for studies. The results of electrochemical impedance spectroscopy are presented in the form of parameters characterizing the corrosion process. Obtained results were statistically analyzed. The electrochemical impedance spectroscopy studies have shown that the joint welded by FSW has better electrochemical corrosion resistance than the native material - AW-7020 alloy. Original value are received results of the corrosion properties of new method friction stir welded AlZn5Mg1 alloy compared with the native material.

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Corrosion Properties of 34CrMo4 Steel Modified by Shot Peening

Scanning ◽

10.1155/2017/1928198 ◽

2017 ◽

Vol 2017 ◽

pp. 1-8 ◽

Cited By ~ 5

Author(s):

Qiang Zheng ◽

Kejian Li ◽

Xueguo Yin ◽

Bingbing Li ◽

Chunhong Li ◽

...

Keyword(s):

Passive Film ◽

Cross Sections ◽

Shot Peening ◽

Oil And Gas ◽

Electrochemical Impedance ◽

Electrochemical Corrosion ◽

Xrd Analysis ◽

Corrosion Properties ◽

Electrochemical Corrosion Behavior ◽

34Crmo4 Steel

A nanocrystalline layer was prepared on the surface of 34CrMo4 steel by time controlling shot peening (SP, i.e., 1, 5, 10, and 20 minutes). Field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) analysis, and transmission electron microscope (TEM) were applied to analyze the surface, cross-sections, and grain size of the specimens before and after SP. The electrochemical corrosion behavior was used to simulate a liquid under the oil and gas wells environment. It was characterized by the potentiodynamic polarization test and electrochemical impedance spectroscopy (EIS). The analysis results show that the surfaces of the SP samples were very rough and had numerous cracks. A passive film on SP surface was formed by nanocrystalline grains. However, the passive film formed in the initial stage was not dense or uniform, and cracks occurred in the passive film during peening, resulting in a decrease in corrosion resistance.

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Effect of combined surface treatment on quality and electrochemical corrosion properties of manganese phosphate on hsla steel domex 700

Koroze a ochrana materialu ◽

10.1515/kom-2018-0008 ◽

2018 ◽

Vol 62 (2) ◽

pp. 45-53 ◽

Cited By ~ 1

Author(s):

Kamil Borko ◽

F. Pastorek ◽

Jacková M. Neslušan ◽

S. Fintová ◽

B. Hadzima

Keyword(s):

Corrosion Resistance ◽

Surface Treatment ◽

Electrochemical Impedance ◽

Hsla Steel ◽

Electrochemical Corrosion ◽

High Strength Steels ◽

High Strength ◽

Corrosion Properties ◽

Manganese Phosphate ◽

Pre Treatment

Abstract The actual industrial trend is focused on weight reduction of constructions while preserving strength properties. For this purpose, conventional steel are replaced by high strength steels.. The aim of this study was to evaluate the effects of mechanical surface pre-treatment on corrosion resistance of high strength low alloy steel Domex 700 before and after surface treatment by manganese phosphating. Tested environment was 0,1M NaCl solution. Evaluation of mechanical pre-treatment and phosphating effects on corrosion resistance was realized by electrochemical measurements: potentiodynamic polarization measurements (Tafel analysis) and electrochemical impedance spectroscopy (equivalent circuits). From resulsts it is possible to conclude, that creation of manganese phosphate layer on ground and shot peened steel surface significantly increases the corrosion resistance of Domex 700 steel.

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ORTHODONTIC TREATMENT WITH Nd-Fe-B MAGNETS

EUREKA Health Sciences ◽

10.21303/2504-5679.2020.001316 ◽

2020 ◽

Vol 3 ◽

pp. 54-62

Author(s):

Valerii Kutsevlyak ◽

Vladyslav Starikov ◽

Volodymyr Samofalov ◽

Vadym Starikov

Keyword(s):

Corrosion Resistance ◽

Permanent Magnets ◽

Mutual Influence ◽

Electrochemical Corrosion ◽

Magnetic Interaction ◽

Original Method ◽

Physiological Solution ◽

Protective Oxide ◽

Corrosion Properties ◽

Interaction Forces

The aim. The development of methodology for experimental and theoretical assessment of interaction forces between magnets in an orthodontic apparatus, the test of corrosion resistance of protective oxide and nitride coatings deposited on Nd-Fe-B magnets surface. Materials and methods. The Nd-Fe-B permanent magnets with saturation magnetization Ms≈1100 G and bilayer ZrN / ZrO2 coatings were used. To experimental measure of interaction forces between magnets the device was assembled on the base of analytical balance. The distance between the magnets was varied using non-magnetic plates. The ZrO2 and ZrN coatings have been analyzed for their corrosion properties in 0.9 % NaCl quasi-physiological solution. Results. An original method was proposed for calculating of magnetic interaction forces for materials with high magnetic anisotropy, which has good agreement with experimental measurement of forces. The theoretical model takes into account the size of the magnets and the mutual influence of their opposite faces. An increase of corrosion resistance of magnetic materials can be provided by zirconium oxide or nitride compounds, which contribute to inhibition of electrochemical corrosion of Nd-Fe-B magnets. Conclusions. A method for calculating of interaction forces between permanent magnets, which are used for correction of malocclusion in orthodontic, has been developed. The passivation of the Nd-Fe-B permanent magnets surface can be achieved by applying of bilayer ZrN / ZrO2 coating.

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Effect of surface treatment by sandblasting on the quality and electrochemical corrosion properties of a C-1020 carbon steel used by an Algerian oil company

MATEC Web of Conferences ◽

10.1051/matecconf/201927201001 ◽

2019 ◽

Vol 272 ◽

pp. 01001

Author(s):

Nadia HAMMOUDA ◽

Kamel BELMOKRE

Keyword(s):

Carbon Steel ◽

Electrochemical Impedance ◽

Electrochemical Corrosion ◽

Surface Preparation ◽

Nacl Solution ◽

Corrosion Properties ◽

Good Surface ◽

Oil Company ◽

Mechanical Surface ◽

Effect Of Surface

The purpose of the different operations under the term surface preparation is to get a clean surface able to be coated. It is essential to adapt this preparation in terms of the metallurgical nature of the substrate, cleanliness, its shape and roughness. Surface preparations especially the operations of sandblasting, polishing, or grinding prove of capital importance. It allows to modify the superficial properties of these materials, after these treatments the surface becomes very active. This paper evaluates the mechanical surface treatments effect by sandblasting (Sa 1.5 and Sa 2.5) on the electrochemical corrosion characteristics of C-1020 carbon steel in 3% NaCl solution electrolyte simulating aggressive sea atmosphere. Investigations are conducted using stationary (free potential "E-t, polarization curves "E-i", the Tafel rights and the Rp) and nonstationary electrochemical tools such as electrochemical impedance. The results obtained allowed us to highlight that sandblasted carbon steel degrades with immersion time because of the roughness of the surface. These results were confirmed by the plot of the electrochemical impedance diagrams, confirming that the process governing kinetics is under charge transfer control. Good protection against corrosion cannot be obtained only with a good surface preparation of the adapted steel.

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Electrochemical corrosion characteristics of phosphated S355J2 steel in sulfate environment

Koroze a ochrana materialu ◽

10.1515/kom-2016-0017 ◽

2016 ◽

Vol 60 (4) ◽

pp. 107-113 ◽

Cited By ~ 1

Author(s):

F. Pastorek ◽

K. Borko ◽

S. Dundeková ◽

S. Fintová ◽

B. Hadzima

Keyword(s):

Electrochemical Impedance ◽

Electrochemical Corrosion ◽

Surface Preparation ◽

Corrosion Properties ◽

Preparation Methods ◽

Surface Pretreatment ◽

Chemical Surface ◽

Phosphate Layer ◽

Before And After ◽

The Right

Abstract Large number of mechanical and chemical surface pretreatment techniques is actually used on steels in industrial practice. Choosing the right combination of these technologies is one of the most important tasks for many applications. The purpose of this research was to evaluate the influence of selected mechanical surface preparation methods (grinding, sandblasting) on the quality and electrochemical corrosion characteristics of S355J2 steel before and after the final chemical surface treatment by the technology of manganese phosphating. The surface morphology of the formed phosphate layer was evaluated by a scanning electron microscopy (SEM) and the cross section analysis was performed by a light metallographic microscopy. 0.1M Na2SO4 solution simulating aggressive industrial pollution was selected for electrochemical corrosion tests. Impact evaluation of various mechanical and chemical surface treatments on the corrosion properties of the tested steel was realized by potentiodynamic polarization tests (PD) and electrochemical impedance spectroscopy (EIS) using the Tafel analysis and equivalent circuits method respectively. The obtained results proved that sandblasting negatively affected the corrosion resistance of S355J2 steel and subsequently created manganese phosphate layer.

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Influence of Joining Method on Electrochemical Corrosion Properties of 7020 Aluminum Alloy Joints

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.220-221.589 ◽

2015 ◽

Vol 220-221 ◽

pp. 589-594

Author(s):

Krzysztof Dudzik

Keyword(s):

Aluminum Alloy ◽

Electrochemical Impedance Spectroscopy ◽

Friction Stir Welding ◽

Impedance Spectroscopy ◽

Electrochemical Impedance ◽

Electrochemical Corrosion ◽

Signal Amplitude ◽

Metallographic Analysis ◽

Corrosion Properties ◽

Friction Stir

The results of corrosion properties research of aluminum alloy AW 7020 (AlZn5Mg1) welded by friction stir welding (FSW) and MIG were presented. Friction Stir Welding (FSW) – a new technology can be successfully used for butt welding of different types of aluminum alloy sheets. In the paper, the parameters for friction stir welding of sheets made of AlZn5Mg1 [7020] alloy were presented as well as parameters for MIG. Metallographic analysis of bonds showed a proper structural construction of both, the FSW and MIG welded 7020 aluminum alloys.The study was carried out in accordance with the requirements of the ASTM G 106. EIS measurement was performed in three-electrode system in artificial seawater (3.5% NaCl). Impedance studies were carried out at the corrosion potential. Changed voltage signal amplitude in the range ±10 mV and frequency range of changes was as follows: 100 kHz – 0.1 Hz. Atlas 0531 EU & IA potentiostat was used for studies.The results of electrochemical impedance spectroscopy are presented in the form of parameters characterizing the corrosion process. Obtained results were statistically analyzed.The electrochemical impedance spectroscopy studies have shown that the joint welded by FSW has better electrochemical corrosion resistance than the joint welded by MIG and the native material – AW-7020 alloy.Original value are received results of the corrosion properties of new method friction stir welded AlZn5Mg1 alloy compared with traditional MIG method and the native material.

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Electrochemical corrosion study of Pb-free solders

Journal of Materials Research ◽

10.1557/jmr.2006.0035 ◽

2006 ◽

Vol 21 (1) ◽

pp. 62-70 ◽

Cited By ~ 32

Author(s):

B.Y. Wu ◽

Y.C. Chan ◽

M.O. Alam ◽

W. Jillek

Keyword(s):

Acid Solution ◽

Corrosion Behavior ◽

Current Density ◽

Corrosion Potential ◽

Electrochemical Impedance ◽

Electrochemical Corrosion ◽

Corrosion Current ◽

Corrosion Properties ◽

Linear Polarization Resistance ◽

Eis Measurements

This paper presents an investigation on the corrosion behavior of five solders by means of polarization and electrochemical impedance spectroscopy (EIS) measurements. The Sn–9Zn and Sn–8Zn–3Bi solder, in comparison with the Sn–3.5Ag–0.5Cu and Sn–3.5Ag–0.5Cu–9In solder, were tested in 3.5 wt% NaCl solution and 0.1 wt% adipic acid solution, respectively. The Sn–37Pb solder was for reference in this work. The polarization curves indicated that the Sn–9Zn and Sn–8Zn–3Bi solder showed the worst corrosion resistance both in the salt and acid solutions, in terms of corrosion-current density, corrosion potential, linear polarization resistance, and passivation-current density. Meanwhile, the Sn–3.5Ag–0.5Cu solder remained the best corrosion characteristics in both solutions. It was found that due to microstructure alteration, Bi additive to the Sn–9Zn solder improved the corrosion behavior in the salt solution, whereas decreased that in the acid solution. However, the additive of In degraded the Sn–3.5Ag–0.5Cu solder in both solutions. The EIS results agreed well with the noble sequence of the five solders subjected to the two solutions with polarization. The equivalent circuits were also determined. Nevertheless, the four Pb-free solders exhibited acceptable corrosion properties since there was not much difference of key corrosion parameters between them and the Sn–37Pb solder.

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Electrochemical Behavior of Rejected Dental Implants in Peri-Implantitis

Coatings ◽

10.3390/coatings10030209 ◽

2020 ◽

Vol 10 (3) ◽

pp. 209 ◽

Cited By ~ 1

Author(s):

Ioana Bunoiu ◽

Mihai Andrei ◽

Cristian Scheau ◽

Claudiu Constantin Manole ◽

Andrei Bogdan Stoian ◽

...

Keyword(s):

Dental Implants ◽

Energy Dispersive Spectrometry ◽

Open Circuit Potential ◽

Electrochemical Impedance ◽

Open Circuit ◽

Electrochemical Stability ◽

X Rays ◽

Electrical Circuits ◽

Corrosion Rates ◽

Over Time

This paper aims to investigate the electrochemical stability of four dental implants based on titanium alloys, rejected and recovered from patients diagnosed with peri-implantitis. The recovered implants were investigated over one week through open circuit potential (OCP) measurements, Tafel analysis, electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM) coupled with energy dispersive spectrometry (EDS). Patients’ X-rays and clinical data were collected. The OCP measurements showed numerous variations of the potential over time, with increases and decreases, which indicated passivation–depassivation cycles. The main corrosion parameters were obtained through Tafel analysis. Corrosion rates and polarization curves suggested a greater instability trend over time for one implant. Bode Modulus and Nyquist diagrams were obtained after EIS was performed and electrical circuits were proposed and fitted for the dental implants in order to follow the materials resistance over time. Although two implants had the highest initial recorded resistances, they showed the most decrease over time. SEM micrographs showed pitting corrosion, while the presence of the Cl element in the EDS spectra indicated the presence of chlorides associated with these processes. The analyses performed on the dental implants denoted instability, with a different behavior for each one.

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