Surface GARField: a novel one-sided NMR magnet and RF probe

Aptaker, P.S.; McDonald, Peter J.; Mitchell, Jonathan

doi:10.1016/j.mri.2007.01.020

Cited by 9 publications

(2 citation statements)

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“…Glover, Aptaker et al [45,46] proposed the GARField approach, a powerful magnetic resonance imaging (MRI) method that can be used for monitoring the ingress of water in coatings and the corresponding changes in molecular mobility [47]. Baukh et al [38] used this approach to visualize the water distribution in multilayer polymeric films: using a high static gradient of the magnetic field generated by special shaped magnetic poles, depth profiles over 500 μm could be analyzed with a 2.5-6 μm resolution.…”

Section: Paint and Coatings Industrymentioning

confidence: 99%

Transport of Electrolyte in Organic Coatings on Metal

Manoli¹,

Pečko²,

Assche³

et al. 2019

Paint and Coatings Industry

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Organic coatings form an effective barrier between metals and their environment, providing them protection against corrosion. Corrosion on coated metals depends mainly on the diffusion of water through the coating, the loss of adhesion at the interface between the coating and the metal (delamination), the rate of the chemical and electrochemical reactions under the coating and the treatment of the metal surface before the coating application. Many aggressive ions are transported toward and inside the coating through water. In organic coatings, typically, the water absorbed by the coating affects the polymer matrix structure, and it causes swelling and stresses, which may result in cracks. Swelling and cracks enhance the transport of water into the solid polymer, and concurrently the diffusion of ions. Over time also, the chemical structure of the polymer may change, adversely affecting its barrier properties and overall performance. In this chapter, we focus on methods to quantify the transport of electrolyte in organic coatings. We mark out the main characteristics, advantages and limitations of each one of them.

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Section: Paint and Coatings Industrymentioning

confidence: 99%

Transport of Electrolyte in Organic Coatings on Metal

Manoli¹,

Pečko²,

Assche³

et al. 2019

Paint and Coatings Industry

View full text Add to dashboard Cite

show abstract

“…Furthermore there is a wealth of systems which can only be studied at what is becoming to be known as 'mobile' NMR-spectrometers, whose highly inhomogeneous magnetic field prohibits any access to FT spectroscopic data. These include NMR-equipment used in prospecting oil [4] or studying bulky samples [5,6]. In such situations, measurement of relaxation rates -phenomenological quantities describing repolarisation kinetics of macroscopic magnetisation of a system of nuclear spins along the constant field of the NMR spectrometer's magnet after an excitation by radio frequency (RF) irradiation -becomes essential.…”

Section: Introductionmentioning

confidence: 99%