In-Vitro Corrosion Studies of Bioabsorbable Alloys

2012 ◽  
pp. 477-482 ◽  
Author(s):  
P. Gill ◽  
N. Munroe
Keyword(s):  
Corrosion Studies

scholarly journals In vitro corrosion studies of stainless-steel dental substrates during Porphyromonas gingivalis biofilm growth in artificial saliva solutions: providing insights into the role of resident oral bacterium

RSC Advances ◽  
2020 ◽  
Vol 10 (52) ◽  
pp. 31280-31294
Author(s):  
Ubong Eduok ◽  
Jerzy Szpunar
Keyword(s):  
Stainless Steel ◽  
Porphyromonas Gingivalis ◽  
Artificial Saliva ◽  
Biofilm Growth ◽  
Corrosion Studies ◽  
Oral Bacterium ◽  
Culture Suspension

A stainless-steel 321 dental substrate significantly corroded within Porphyromonas gingivalis growth culture in artificial saliva culture suspension, with and without NaF additive.

In vitro cytotoxicity and corrosion studies of some copper base shape memory alloys

2017 ◽  
Vol 4 (10) ◽  
pp. 10672-10681
Author(s):  
T. Rajesh Kumar Dora ◽  
V. Sampath ◽  
Yuncang Li ◽  
Peter Hodgson
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
In Vitro Cytotoxicity ◽  
Copper Base ◽  
Corrosion Studies

Long-term corrosion studies in vitro of amalgams in contact

1985 ◽  
Vol 43 (4) ◽  
pp. 205-213 ◽  
Author(s):  
Lars-Erik Moberg ◽  
Agneta Odén
Keyword(s):  
Corrosion Studies

scholarly journals Electrochemical behavior and pH stability of artificial salivas for corrosion tests

2007 ◽  
Vol 21 (3) ◽  
pp. 209-215 ◽  
Author(s):  
Gláucia Maria Oliveira de Queiroz ◽  
Leandro Freitas Silva ◽  
José Tarcísio Lima Ferreira ◽  
José Antônio da Cunha P. Gomes ◽  
Lúcio Sathler
Keyword(s):  
Artificial Saliva ◽  
Human Saliva ◽  
Ph Stability ◽  
Pharmaceutical Sciences ◽  
Redox Potentials ◽  
Reduction Processes ◽  
Corrosion Studies ◽  
Ph Variations ◽  
Reducing Properties

It is assumed that the compositions of artificial salivas are similar to that of human saliva. However, the use of solutions with different compositions in in vitro corrosion studies can lead dissimilar electrolytes to exhibit dissimilar corrosivity and electrochemical stability. This study evaluated four artificial salivas as regards pH stability with time, redox potentials and the polarization response of an inert platinum electrode. The tested solutions were: SAGF medium, Mondelli artificial saliva, UFRJ artificial saliva (prepared at the School of Pharmacy, Federal University of Rio de Janeiro, RJ, Brazil) and USP-RP artificial saliva (prepared at the School of Pharmaceutical Sciences of Ribeirão Preto, University of São Paulo, SP, Brazil). It was observed that pH variations were less than 1 unit during a 50-hour test. The SAGF medium, and the UFRJ and USP-RP solutions exhibited more oxidizing characteristics, whereas the Mondelli solution presented reducing properties. Anodic polarization revealed oxidation of the evaluated electrolytes at potentials below +600 mV SCE. It was observed that the UFRJ and USP-RP solutions presented more intense oxidation and reduction processes as compared to the Mondelli and SAGF solutions.

scholarly journals In Vitro Corrosion Studies of Surface Modified NiTi Alloy for Biomedical Applications

2014 ◽  
Vol 2014 ◽  
pp. 1-13 ◽  
Author(s):  
Manju Chembath ◽  
J. N. Balaraju ◽  
M. Sujata
Keyword(s):  
Contact Angle ◽  
Photoelectron Spectroscopy ◽  
Electrochemical Impedance ◽  
Niti Alloy ◽  
Passive Layer ◽  
Water Contact ◽  
Force Microscopy ◽  
Corrosion Studies ◽  
Surface Modified

Electropolishing was conducted on NiTi alloy of composition 49.1 Ti-50.9 Ni at.% under potentiostatic regime at ambient temperature using perchloric acid based electrolyte for 30 sec followed by passivation treatment in an inorganic electrolyte. The corrosion resistance and biocompatibility of the electropolished and passivated alloys were evaluated and compared with mechanically polished alloy. Various characterization techniques like scanning electron microscopy, atomic force microscopy, and X-ray photoelectron spectroscopy were employed to analyze the properties of surface modified and mechanically polished alloys. Water contact angle measurements made on the passivated alloy after electropolishing showed a contact angle of 35.6°, which was about 58% lower compared to mechanically polished sample, implying more hydrophilicity. The electrochemical impedance studies showed that, for the passivated alloy, threefold increase in the barrier layer resistance was obtained when compared to electropolished alloy due to the formation of compact titanium oxide. The oxide layer thickness of the passivated samples was almost 18 times higher than electropolished samples. After 14 days immersion in Hanks’ solution, the amount of nickel released was 315 ppb which was nearly half of that obtained for mechanically polished NiTi alloy, confirming better stability of the passive layer.

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