Studies of periodic seawater spray icing with unilateral NMR

• Published in: Journal of magnetic resonance (1997) Vol. 334; p. 107109
• Main Authors: Ahmadi, Shahla, Aguilera, Andrés Ramírez, MacMillan, Bryce, Mastikhin, Igor
• Format: Journal Article
• Language: English
• Published: United States Elsevier Inc 01.01.2022
• Subjects: Brine content; FT Strafi; Portable Nuclear Magnetic Resonance; Seawater ice; Seawater spray ice; Spongy ice; T2 relaxation time; Brine content; Spongy ice; Seawater ice; Portable Nuclear Magnetic Resonance; T2 relaxation time; Seawater spray ice; FT Strafi; T relaxation time
• ISSN: 1090-7807; 1096-0856
• DOI: 10.1016/j.jmr.2021.107109

[Display omitted] •A portable NMR used to characterize evolution of stationary and sea spray ice.•CPMG experiments showed unimodal T2 distribution for stationary ice.•Sea spray ice has a bimodal T2 distribution at horizontal and vertical orientations.•1D FT STRAFI imaging was used to spatially resolve the sea spray ice accumulation. Sea water ice has a complicated pore structure consisting of brine-filled pockets within a solid ice matrix. In this work, an unilateral Nuclear Magnetic Resonance instrument was used to characterize the evolution of sea-ice brine inclusions in two types of ice: stationary seawater ice and seawater spray ice formed by periodic spraying on horizontal and vertical surfaces. The portable unilateral NMR was capable of measuring very low amounts of brine (<10% of the water-filled volume). CPMG experiments were performed to extract the information on brine content and T2 distribution at temperatures between −6 °C and −16 °C. 1D imaging was used to spatially resolve the ice brine accumulation. The results show that the seawater spray ice growth, brine content (greater for the horizontal orientation than for the vertical one), and T2 distribution (unimodal for stationary ice and bimodal for spray ice) depend on temperature and surface orientation.