Preparation and Properties of a Self-Deicing Coating Based on Layered Double Hydroxide

Abstract:

Layered double hydroxide containing chloride (Cl^- LDHs) was obtained by calcination recovery method, and the self-deicing coating was prepared by blending Cl^- LDHs and SBR modified asphalt emulsion. Freezing point and carbon steel corrosion rate of Cl^- LDHs solution were tested. Deicing performance of the self-deicing coating was investigated by testing the melting ice point of coating surface and the adhesion force between ice and self-deicing coating,then the deicing durability were evaluated by immersion test and microscopic observation. The results showed that the freezing point of solution with 20wt% Cl^- LDHs was-9.1°C. The corrosion rate of carbon steel in 20wt.% Cl^- LDHs solution was 1.17mm/a, which was only a little higher than corrosion rate of carbon steel in tap water. When the amount of the self-deicing coating with 8wt.% Cl^- LDHs was 400 g/m², the melting ice point on the coating surface was-3.2°C and the adhesion force between ice and self-deicing coating was 24N at-15°C. After immersion in water, the deicing performance and microstructure of the self-deicing coating almost unchanged, which indicates that Cl^- LDHs in the self-deicing coating wasn’t dissolved and the coating had excellent deicing durability.

• Periodical: Materials Science Forum (Volume 898)
• Pages: 1553-1560
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.898.1553
• Online since: June 2017
• Authors: Yi Yi*, Jian Ying Yu, Xiao Chen, Zhi Long Cao, Min Wu
• Keywords: Asphalt Pavement, Deicing Durability, Deicing Performance, Layered Double Hydroxide, Self-Deicing Coating

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