Smart corrosion sensing phenanthroline modified alkyd coatings

Dhole, G.S.; Gunasekaran, G.; Singh, S.K.; Vinjamur, Madhu

doi:10.1016/j.porgcoat.2015.07.020

Cited by 28 publications

(14 citation statements)

References 15 publications

(16 reference statements)

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“…All dispersions were kept stirring, and FCS experiments were performed at different time intervals after the dispersions preparation. During an FCS experiment the time-dependent fluctuations of the fluorescence intensity δI(t) caused by the diffusion of the fluorescent species (loaded nanocapsules or freely diffusing activated fluorescent molecules) through the confocal observation volume were recorded and analyzed by an autocorrelation function G(t) = 1 + ⟨δI(t) δI(t +τ)⟩/⟨I(t)⟩ 2 . For an ensemble of m different types of freely diffusing fluorescence species, G(t) has the following analytical form.…”

Section: Methodsmentioning

confidence: 99%

“…1 The pH-sensitive phenolphthalein was directly mixed in the coating layer and was found to give a purple color to the laminate when it was immersed in sodium hydroxide solutions. Similarly, when a phenanthroline dye was added in an alkyd resin 2 or acrylic coating 3 on mild steel, a color change could be observed because of the complexation of the dye with Fe 2+ . In order to protect the dye from detrimental interactions with the coating matrix, pH indicators can be encapsulated.…”

Section: Introductionmentioning

confidence: 99%

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Nanosensors for Monitoring Early Stages of Metallic Corrosion

Exbrayat

Salaluk

Uebel

et al. 2019

ACS Appl. Nano Mater.

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A new generation of nanosensors based on mesoporous silica nanocapsules with the ability to monitor the onset of metallic corrosion is successfully developed and tested on 304 stainless steel. The core of the nanocapsules contains water insoluble organic molecules that fluoresce during the anodic dissolution of metallic substrates in the corrosion process. The dispersion of the nanosensors in organic coatings applied on metal substrate allows a very sensitive fluorescent detection of the initiation of metal dissolution, close to defects in the substrate. This promising concept offers therefore new perspectives for the development of smart coatings for corrosion sensing.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Nanosensors for Monitoring Early Stages of Metallic Corrosion

Exbrayat

Salaluk

Uebel

et al. 2019

ACS Appl. Nano Mater.

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“…[ 31 ] Therefore, fluorescent dyes which can form a complex with metal ions leading to emission or quenching of fluorescence or pH‐sensitive dyes are suitable for detecting corrosion. Fluorescent and pH‐sensitive dyes such as rhodamine derivatives, [ 11,32,33 ] phenanthroline, [ 34–36 ] 7‐hydroxycoumarin, [ 37 ] bromothymol blue, [ 37 ] or phenolphthalein [ 37–40 ] were incorporated into coatings. Smart coatings containing these dyes could change their color or become fluorescent upon occurrence of corrosion.…”

Section: Introductionmentioning

confidence: 99%

Nanonetwork Composite Coating for Sensing and Corrosion Inhibition

Salaluk

Auepattana‐Aumrung

Thongchaivetcharat

et al. 2020

Adv Materials Inter

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A nanonetwork composite coating is prepared for serving as both pH sensor and reservoir for the delivery of functional payload. The composite coating consists in nanofibers containing encapsulated pH‐responsive dye and corrosion inhibitor. The nanofibers are then incorporated in a hydrophobic polymer. While the nanofibers remained intact, they provide additional adhesion strength to the metal substrate. Sensing ability and releasing of active payload are demonstrated by immersing in an artificial corrosive environment and electrochemical impedance spectroscopy measurements. The composite coating can detect the early onset of corrosion and hinders efficiently corrosion compared with passive coatings. This concept paves the way for creating smart coatings that can hinder corrosion progress and allow for an early detection of corrosion before irreversible damages on metallic structures.

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“…Using corrosion monitoring, the regions of early corrosion can be identified, which contribute to the timely detection of corrosion and its corresponding maintenance. Due to its high sensitivity and precise measurement, fluorescence spectroscopy can be used to evaluate and monitor the corrosion tendency and level more accurately. − Moreover, because the protective coatings used for cultural relics are transparent, they are particularly suited to the use of fluorescence spectroscopy to monitor the levels of corrosion.…”

Section: Introductionmentioning

confidence: 99%

Corrosion Monitoring Effect of Rhodamine-Ethylenediamine on Copper Relics under a Protective Coating

2020

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Fluorescence spectroscopy is a common technique used to monitor early metallic corrosion. The fluorescence response characteristics of rhodamine-ethylenediamine toward Cu 2+ have been studied using fluorescence and infrared spectroscopy. Fluorescence microscopy and electrochemical impedance spectroscopy were used to study the monitoring effect of rhodamine-ethylenediamine on the corrosion of copper relics protected by an epoxy coating. The results showed a strong fluorescent response and selectivity toward Cu 2+ that existed using rhodamine-ethylenediamine. Early metallic corrosion of copper relics can be effectively monitored upon adding 0.8 wt % rhodamine-ethylenediamine to an epoxy coating. When the soaking time was increased, the fluorescence intensity of the fluorescent area on the coating became stronger. In addition, the area of the luminous coating reached ∼0.06 mm 2 and the area of corrosion under the protective coating was ∼0.008 mm 2 , which was about 1/10 of the fluorescence area observed on the coating.

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Smart corrosion sensing phenanthroline modified alkyd coatings

Cited by 28 publications

References 15 publications

Nanosensors for Monitoring Early Stages of Metallic Corrosion

Nanosensors for Monitoring Early Stages of Metallic Corrosion

Nanonetwork Composite Coating for Sensing and Corrosion Inhibition

Corrosion Monitoring Effect of Rhodamine-Ethylenediamine on Copper Relics under a Protective Coating

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