Comparative Study on the Performance of Solvent-Based and Waterborne Polyurethane Top-Coats in Laboratory Accelerated Test and Field Test

MA Kaijun, XUE Fengying, ZHANG Zhiyou, CHEN Zhangfeng

doi:10.16577/j.issn.1001-1560.2024.0047

2024 , Vol. 57 >Issue 2: 154 - 161

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0047

Comparative Study on the Performance of Solvent-Based and Waterborne Polyurethane Top-Coats in Laboratory Accelerated Test and Field Test

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(1.School of New Energy and Materials， China University of Petroleum， Beijing， Beijing 102249， China；2.State Pipeline Network Group East Crude Oil Storage and Transportation Co.， Ltd.， Xuzhou 221000， China)

CHEN Changfeng(1974-)，Professor，Ph.D.，Research Focus:Metallogy and Metal Technology，Oil and Gas Industry， Materials Science， E-mail: chen_c_f＠163.com

Received date: 2023-08-21

Revised date: 2023-09-28

Accepted date: 2023-10-10

Online published: 2024-03-08

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Abstract

Taking solvent-based acrylic polyurethane top-coat and waterborne aliphatic polyurethane top-coat as the research objects， this study explored the effects of two laboratory accelerated aging methods (neutral salt spray， xenon lamp aging) and natural environmental exposure (Hainan Island) on the aging failure of the two top-coats under the condition of matching the primer and intermediate coat.The salt spray resistance of the coating was assessed by observing changes in the macro/micro morphology and gloss loss rate of top-coats.Electrochemical impedance spectroscopy and infrared absorption spectroscopy were utilized to compare and analyze the difference of anti-corrosion and anti-aging properties of the two coatings，both before and after undergoing xenon lamp aging and natural environmental aging tests.Results showed that under each accelerated failure test，the waterborne polyurethane coating was found to have better salt-spray resistance.Additionally，it was observed that the solvent-based acrylic polyurethane top-coat exhibited superior anti-corrosion properties and better aging resistance after the aging test.

Key words： polyurethane top-coat; neutral salt spray; aging test; anti-corrosion property

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MA Kaijun, XUE Fengying, ZHANG Zhiyou, CHEN Zhangfeng . Comparative Study on the Performance of Solvent-Based and Waterborne Polyurethane Top-Coats in Laboratory Accelerated Test and Field Test[J]. Materials Protection, 2024 , 57(2) : 154 -161 . DOI: 10.16577/j.issn.1001-1560.2024.0047

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