Magnetoelastic biosensors: Corrosion protection of an FeNiMoB alloy from alkoxide precursors

Beltrami, Lílian Vanessa Rossa; Kunst, Sandra Raquel; Birriel, Eliena Jonko; Malfatti, Célia de Fraga

doi:10.1016/j.tsf.2017.01.026

Cited by 17 publications

(19 citation statements)

References 45 publications

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“…This siloxane network promoted the protective effect against the penetration of aggressive species. 37 The results presented in the TGA and DTGA thermograms show that the curing temperatures chosen for the FH-T90 and FH-T180 systems promoted the thermal stability required for the desired application. Furthermore, no significant event was observed for mass loss with the evaporation of the EtOH and/ or water solvents at any of the tested curing temperatures; this indicated that these temperatures were effective in evaporating all of the solvents by promoting the curing of the coating.…”

Section: Resultsmentioning

confidence: 91%

“…The mass loss event of the FH-T300 sample started at 282 8C and ended at 455 8C, with the maximum degradation temperature at approximately 370 8C. All of the films showed the beginning of degradation at temperatures above 250 8C; this indicated their thermal instability before they On the basis of the results obtained by FTIR spectroscopy and TGA, Beltrami et al 37 proposed reaction mechanisms for film formation. This mechanisms are shown in Figure 5.…”

Section: Resultsmentioning

confidence: 98%

“…On the basis of the results obtained by FTIR spectroscopy and TGA, Beltrami et al . proposed reaction mechanisms for film formation.…”

Section: Resultsmentioning

confidence: 99%

“…Then, during the curing process, through a condensation reaction, these connections became siloxane–metallic covalent bonds, and the excess silanol groups were crosslinked via the formation of a siloxane network (SiOSi). This siloxane network promoted the protective effect against the penetration of aggressive species …”

Section: Resultsmentioning

confidence: 99%

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Influence of the pretreatment and curing of alkoxysilanes on the protection of the titanium–aluminum–vanadium alloy

Salvador

Marcolin

Beltrami

et al. 2017

J of Applied Polymer Sci

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The use of coatings based on alkoxysilanes is one of the most effective ways to control the release of cytotoxic ions by metal implants. To improve the success rate of titanium–aluminum–vanadium implants, in this study, we evaluated the physicochemical, morphological, mechanical, and electrochemical behavior of hybrid coatings based on alkoxysilanes applied on the alloy. The coatings were prepared with the precursors 3‐(trimethoxysilyl propyl)methacrylate and tetraethoxysilane alkoxides by the sol–gel method. The curing of the coatings was evaluated at different temperatures (90, 180, and 300 °C) for 1 h. We carried out the pretreatment of the alloy by polishing and attacking it with sodium hydroxide. The results indicate that the temperature of 90 °C was effective for solvent evaporation and complete crosslinking of the film, and the alkaline pretreatment allowed the formation of a film with better anticorrosive performance; this indicated that the presence of hydroxyl groups on the surface improved the coating adhesion. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45470.

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Section: Resultsmentioning

confidence: 91%

Section: Resultsmentioning

confidence: 98%

“…On the basis of the results obtained by FTIR spectroscopy and TGA, Beltrami et al . proposed reaction mechanisms for film formation.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Influence of the pretreatment and curing of alkoxysilanes on the protection of the titanium–aluminum–vanadium alloy

Salvador

Marcolin

Beltrami

et al. 2017

J of Applied Polymer Sci

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“…Nevertheless, not only Ni, but also the presence of other elements in their composition will determine the corrosion resistance of the samples [12][13][14]. It has been already reported by several authors that the addition of certain elements, such as Cr [15,16] or Mo [17] substantially increases the corrosion resistance of the metallic alloys. In fact, in one of our previous works we observed how the addition of Cr improves the corrosion resistance of these type of magnetoelastic alloys [18].…”

Section: Introductionmentioning

confidence: 99%

Magnetic, Magnetoelastic and Corrosion Resistant Properties of (Fe–Ni)-Based Metallic Glasses for Structural Health Monitoring Applications

et al. 2019

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We have performed a study of the magnetic, magnetoelastic, and corrosion resistance properties of seven different composition magnetoelastic-resonant platforms. For some applications, such as structural health monitoring, these materials must have not only good magnetomechanical properties, but also a high corrosion resistance. In the fabricated metallic glasses of composition 73− 5 10 12 , the Fe/Ni ratio was varied (Fe + Ni = 73% at. ) thus changing the magnetic and magnetoelastic properties. A small amount of chromium (Cr 5 ) was added in order to achieve the desired good corrosion resistance. As expected, all the studied properties change with the composition of the samples. Alloys containing a higher amount of Ni than Fe do not show magnetic behavior at room temperature, while iron-rich alloys have demonstrated not only good magnetic properties, but also good magnetoelastic ones, with magnetoelastic coupling coefficient as high as 0.41 for = 0 in the 73 0 5 10 12 (the sample containing only Fe but not Ni ). Concerning corrosion resistance, we have found a continuous degradation of these properties as the Ni content increases in the composition. Thus, the corrosion potential decreases monotonously from 46.74 mV for the = 0, composition 73 0 5 10 12 to −239.47 mV for the = 73, composition 0 73 5 10 12 .

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High sensitivity detection of human serum albumin using a novel magnetoelastic immunosensor

et al. 2019

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Magnetoelastic biosensors: Corrosion protection of an FeNiMoB alloy from alkoxide precursors

Cited by 17 publications

References 45 publications

Influence of the pretreatment and curing of alkoxysilanes on the protection of the titanium–aluminum–vanadium alloy

Influence of the pretreatment and curing of alkoxysilanes on the protection of the titanium–aluminum–vanadium alloy

Magnetic, Magnetoelastic and Corrosion Resistant Properties of (Fe–Ni)-Based Metallic Glasses for Structural Health Monitoring Applications

High sensitivity detection of human serum albumin using a novel magnetoelastic immunosensor

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