Effect of pigment and temperature onto swelling and water uptake during organic coating ageing

Lacombre, C. Vosgien; Bouvet, G.; Trinh, Dao; Mallarino, S.; Touzain, S.

doi:10.1016/j.porgcoat.2017.11.022

Cited by 30 publications

(23 citation statements)

References 27 publications

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“…Moreover, different effects can be induced by water uptake on the coatings, such as swelling, water accumulation at the metal/polymer interface and mechanical stress in the coating [41][42][43]. These phenomena can provoke blistering through loss of adhesion and/or corrosion development [3,5,11,44].…”

Section: Differential Scanning Calorimetrymentioning

confidence: 99%

Impedance analysis of the barrier effect of coil-coated materials: Water uptake and glass transition variations

Bonin

Roggero

Caussé

et al. 2021

Progress in Organic Coatings

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Section: Differential Scanning Calorimetrymentioning

confidence: 99%

Impedance analysis of the barrier effect of coil-coated materials: Water uptake and glass transition variations

Bonin

Roggero

Caussé

et al. 2021

Progress in Organic Coatings

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“…Moisture sorption is of particular interest, since it has been linked to service failure of network polymers through cracking, plasticization and swelling. Techniques including positron annihilation lifetime spectroscopy (PALS), [ [25] fluorescence, [26] dielectric spectroscopy [27][28] and gravimetric analysis [29][30] [31] have previously been used to correlate the kinetics of water transport, and the eventual equilibrium water content, to the free volume and polarity of epoxy resins. […”

Section: Introductionmentioning

confidence: 99%

Controlling the nanostructure of epoxy resins: Reaction selectivity and stoichiometry

Morsch

Kefallinou

Liu

et al. 2018

Polymer

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The internal topology of epoxy resins is, for the first time, shown not to be the determining factor for small molecule transport. Whilst epoxy resins comprise the matrix component of many high performance composites, coatings and adhesives, the nanostructure and transport properties of these materials are not well understood. Here, peakforce AFM imaging, in-situ FTIR cure analysis and nanochemical AFM-IR imaging are used to establish the effects of reaction selectivity and stoichiometry on the nanostructure of epoxy-phenolic resins based on bisphenol-A and diglycidyl ether of bisphenol-A. In the presence of excess epoxy, resins transition from exhibiting homogeneous internal nanostructures to the familiar nodular morphology characteristic of epoxies. This occurs as a result of lower reaction selectivity in the presence of increasing catalyst concentrations.Surprisingly however, chemically similar stoichiometric resins with a heterogeneous nanostructure display improved resistance to corrosion breakdown (ion transport) and lower water uptake than the homogeneous resins.

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“…Moisture absorbed by the coating could also accelerate the nanofibre shell material (PVA) dissolution. [ 47–59 ] Thus, GACE from the cut‐off nanofibres showed an accelerated dissolution in the NaCl solution. Iron ions reacted with GACE immediately and formed a chelation film.…”

Section: Resultsmentioning

confidence: 99%

“…With an increase in the immersion test duration, the moisture content of the coating and chelation film and the ion diffusion rate increased. After the water absorption, the coating expanded and swelled, which led to the development of ionic paths within the coating [ 47–59 ] and, subsequently, to weakened barrier properties of the coating. [ 41 ] This resulted in the decreased coating and film resistance, R t .…”

Section: Resultsmentioning

confidence: 99%

Synthesis and characterisation of an iron‐ion‐responsive coating with core–shell electrospun fibres containing a chelation agent

Song

Shi

Han³

et al. 2021

Materials & Corrosion

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A self‐healing coating containing an electrospun nanofibre encapsulating 3,4,5‐trihydroxy benzoic acid cyclohexyl ester (GACE) was prepared. Scanning electron microscopy and transmission electron microscopy demonstrated that the nanofibre had a core–shell structure. The shell thickness of the electrospun fibre was approximately 270 nm, while the core thickness was approximately 380 nm. The self‐healing process of the coating containing GACE nanofibres over a carbon steel surface was simulated in a 3.5 wt% NaCl solution for 30 days. Fourier‐transform infrared spectroscopy analysis revealed that the synthesised GACE reacted with iron ions and formed a stable Fe–O–C compound, which could repair the scratched coating. The self‐repair performance was evaluated through electrochemical measurements, and then a healing model was developed.

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Effect of pigment and temperature onto swelling and water uptake during organic coating ageing

Cited by 30 publications

References 27 publications

Impedance analysis of the barrier effect of coil-coated materials: Water uptake and glass transition variations

Impedance analysis of the barrier effect of coil-coated materials: Water uptake and glass transition variations

Controlling the nanostructure of epoxy resins: Reaction selectivity and stoichiometry

Synthesis and characterisation of an iron‐ion‐responsive coating with core–shell electrospun fibres containing a chelation agent

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