Titre :

Comprehensive Study of the Influence of Different Aging Scenarios on the Fire Protective Behavior of an Epoxy Based Intumescent Coating

Auteur(s) :

Jimenez, Maude [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Bellayer, Séverine [Auteur]
Ecole Nationale Supérieure de Chimie de Lille [ENSCL]
Revel, Bertrand [Auteur]
Centre Commun de Mesure de RMN
Duquesne, Sophie [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207
Bourbigot, Serge [Auteur]
Unité Matériaux et Transformations (UMET) - UMR 8207

Titre de la revue :

Industrial and engineering chemistry research

Nom court de la revue :

Ind. Eng. Chem. Res.

Numéro :

52

Pagination :

729-743

Éditeur :

American Chemical Society

Date de publication :

2012-12-19

ISSN :

0888-5885

Mot(s)-clé(s) en anglais :

Anions
Coating materials
Phosphorus
Redox reactions
Sodium

Discipline(s) HAL :

Sciences de l'ingénieur [physics]/Matériaux
Sciences de l'ingénieur [physics]/Génie des procédés
Chimie/Matériaux
Chimie/Polymères
Sciences du Vivant [q-bio]/Ingénierie des aliments
Sciences du Vivant [q-bio]/Biochimie, Biologie Moléculaire

Résumé en anglais : [en]

Passive fire protection systems are widely used by the oil, gas, and chemical industries to protect steel against fire. However, there are concerns that the performance of these systems in a fire may be deteriorated because ...
Lire la suite >Passive fire protection systems are widely used by the oil, gas, and chemical industries to protect steel against fire. However, there are concerns that the performance of these systems in a fire may be deteriorated because of weathering. Different weathering causes can modify fire performances of coatings, such as UV exposure, moisture, temperature, and immersion in a corrosive environment such as seawater. In this study, an intumescent fire retardant epoxy based coating containing ammonium polyphosphate (APP), melamine, and titanium dioxide was chosen as a model system. Primed steel plates covered with a 1500 μm thickness coating were exposed to different accelerated aging conditions: 80% moisture atmosphere at 70 °C for 2 months and a static immersion bath with and without NaCl (5 g/L) at 20 °C for 1 month. The formulations were then tested under hydrocarbon fire conditions using a small scale furnace test developed in our lab. Immersion in distilled water for 1 month shows a slight decrease of the protective properties: On coating extreme surface, APP turns into polyphosphoric acid, which, combined with the mechanical erosion effect of water, is dissolved/detached in water. The coatings immersed for 1 month in the salted water bath show very poor protection of the steel plate, and no intumescence is observed. Sodium and chloride migrate very rapidly into the matrix. The sodium reacts with the polyphosphates to substitute ammonium species, preventing the release of ammonia during burning and thus the char swelling. As the sodium polyphosphate created is much more soluble than the ammonium polyphosphate, it dissolves rapidly inside the matrix and reduces the quantity of phosphorus. Melamine corrosion is also accelerated by the presence of chlorides. The chemical structure of the char is as a consequence different: NASICON (Na–O–P–Ti species) are created during burning, whereas only titanium pyrophosphate is created when the reference coating is burnt.Lire moins >

Langue :

Anglais

Comité de lecture :

Oui

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
ENSCL
CNRS
INRA

Collections :

• Unité Matériaux et Transformations (UMET) - UMR 8207

Équipe(s) de recherche :

Ingénierie des Systèmes Polymères
Processus aux Interfaces et Hygiène des Matériaux (PIHM)
Procédés de Recyclage et de Fonctionnalisation (PReF)

Date de dépôt :

2019-05-16T15:31:14Z
2025-03-18T11:35:20Z