Aging Behavior of Polyaspartic Polyurea under Salt-Fog Exposure Studied by Electrochemical Impedance Spectroscopy

Wei Bo Huang; Jing Zhang; Xin Mao Li; Ping Lu

doi:10.4028/www.scientific.net/AMR.455-456.760

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 455-456Aging Behavior of Polyaspartic Polyurea under...

Aging Behavior of Polyaspartic Polyurea under Salt-Fog Exposure Studied by Electrochemical Impedance Spectroscopy

Abstract:

- Electrochemical impedance spectroscopy (EIS) was used to study the thickness and curing temperature influence on the aging behavior of polyaspartic ester (PAE) polyurea under salt fog exposure in this paper. The result has demonstrated that coating thickness and curing temperature had great influence on aging behavior of the PAE-t-HDI prepolymer-D2000H65 aliphatic polyurea (T3). The low frequency impedance after 1day exposure increased from 5.31×1010Ω·cm to 7.96×1010Ω while coating thickness was increased from 40μm to 200μm, and the low frequency impedance of 200μm coating was 7.42×1010Ω·cm2 high after 200 days exposure. The low frequency impedance after 1day and 200 days exposure increased by 0.83×1010 Ω·cm2 and 0.39×109Ω·cm2 respectively, while curing temperature were increased from 60°C to 80°C. Suggestions have been made, namely that increase the coating thickness and curing temperature can improve low frequency impedance of PAE polyurea, as a result, improve the protective properties of the coatings.

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Periodical:

Advanced Materials Research (Volumes 455-456)

Pages:

760-764

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.455-456.760

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Online since:

January 2012

Authors:

Wei Bo Huang, Jing Zhang, Xin Mao Li, Ping Lu

Keywords:

Coating Thickness, Curing Time, Electrochemical Impedance Spectroscopy (EIS), Polyaspartic Polyurea, Salt Fog Exposure

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