[article]
Titre : |
Recycle of magnesium alloy scrap for improving fire resistance, thermal stability, and water tolerance of intumescent fire-retardant coatings |
Type de document : |
texte imprimé |
Auteurs : |
Cheng Wang, Auteur ; Siqi Huo, Auteur ; Shi Liu, Auteur ; Qinghua Hu, Auteur ; Qi Zhang, Auteur ; Zhitian Liu, Auteur |
Année de publication : |
2021 |
Article en page(s) : |
p. 447-458 |
Note générale : |
Bibliogr. |
Langues : |
Américain (ame) |
Catégories : |
Caractérisation Eau Emulsions Formulation (Génie chimique) Intumescence (chimie) Magnésium -- Alliages Polyacrylates Recyclage (déchets, etc.) Résistance à l'humidité:Résistance à l'eau Revêtements protecteurs Stabilité thermique
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Index. décimale : |
667.9 Revêtements et enduits |
Résumé : |
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. |
Note de contenu : |
- EXPERIMENTAL : Materials - Preparation of scrap-modified core–shell polyacrylate emulsions - Preparation of intumescent fire-retardant coatings - Characterizations
- RESULTS AND DISCUSSION : Characterization of magnesium alloy scrap - Stability of the scrap-modified core–shell emulsion - Fire resistance of coatings - Influence of scrap on the char residue - Thermal stability of coatings - Water tolerance of coatings
- Table 1 : The formulation of core–shell polyacrylate emulsion
- Table 2 : The compositions of intumescent fire-retardant coatings
- Table 3 : Contents of C, O, Mg, Al, Si, and Ca in magnesium alloy scrap
- Table 4 : The influence of scrap on the stability of emulsion |
DOI : |
https://doi.org/10.1007/s11998-020-00413-5 |
En ligne : |
https://link.springer.com/content/pdf/10.1007/s11998-020-00413-5.pdf |
Format de la ressource électronique : |
Pdf |
Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=35606 |
in JOURNAL OF COATINGS TECHNOLOGY AND RESEARCH > Vol. 18, N° 2 (03/2021) . - p. 447-458
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