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Journal of Coatings Technology and Research

Erschienen in:

27.10.2020

Recycle of magnesium alloy scrap for improving fire resistance, thermal stability, and water tolerance of intumescent fire-retardant coatings

verfasst von: Cheng Wang, Siqi Huo, Shi Liu, Qinghua Hu, Qi Zhang, Zhitian Liu

Erschienen in: Journal of Coatings Technology and Research | Ausgabe 2/2021

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Abstract

The rapid development and widespread application of magnesium alloy bring about a significant amount of magnesium alloy scrap. Thus, we offer a feasible and simple way to realize the recycling of magnesium scrap in this work, applying it as a synergist in the intumescent fire-retardant coatings for steel structure. With the introduction of magnesium scrap, the fire resistance, thermal stability, and water tolerance of the as-prepared coatings significantly improved. According to ASTM E119 standards, the fire resistance of coatings was investigated in our laboratory. Adding only ~ 0.48 wt% of the scrap decreased the backside temperature of the coated steel from 310°C to 171°C, with a ~ 44.8% reduction, indicating obvious synergy. Moreover, the coating containing ~ 0.48 wt% scrap exhibited excellent thermal stability and water resistance, and its char yield at 800°C and water contact angle reached up to 27% and 80.6°, respectively. Based on the analysis of flame-retardant mechanism, the scrap and intumescent fire-retardant system jointly promoted the formation of an intumescent and compact char residue, thus suppressing the heat transfer and protecting the steel. Hence, using magnesium alloy scrap as a synergist contributed to realizing the recycling of waste and providing practical intumescent fire-retardant coatings for structural steel.

Vorheriger Artikel Vapor phase assembly of benzotriazole and octadecylamine complex films on aluminum alloy surface

Nächster Artikel Correlative studies on the properties of rubber seed and soybean oil-based alkyd resins and their blends

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Titel: Recycle of magnesium alloy scrap for improving fire resistance, thermal stability, and water tolerance of intumescent fire-retardant coatings
verfasst von: Cheng Wang
Siqi Huo
Shi Liu
Qinghua Hu
Qi Zhang
Zhitian Liu
Publikationsdatum: 27.10.2020
Verlag: Springer US
Erschienen in: Journal of Coatings Technology and Research / Ausgabe 2/2021
Print ISSN: 1547-0091
Elektronische ISSN: 1935-3804
DOI: https://doi.org/10.1007/s11998-020-00413-5

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