High-Throughput Fire Tests and Weathering-Induced Degradation Behaviour of Intumescent Coatings

Daus, Lars-Hendrik; Korzen, Manfred; Schartel, Bernhard

doi:10.1088/1742-6596/1107/3/032014

Cited by 4 publications

(5 citation statements)

References 6 publications

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“…Apart from the above, there are publications relating the data from different polymers with rapid mass calorimeter, cone calorimeter, and PCFC [ 11 , 12 ]. More importantly, from the context of this manuscript, there are also many publications on different fire-retardant polymer-based coatings on small steel panels [ 13 , 14 , 15 , 16 ], some [ 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 ] of which use a bulk-scale test setup to evaluate the performance of intumescent coatings. Bulk-scale test involves the use of a coated substrate and the amount of materials involved is typically measured in grams.…”

Section: Introductionmentioning

confidence: 99%

Correlating the Performance of a Fire-Retardant Coating across Different Scales of Testing

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Dasari

et al. 2020

Polymers

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Material-scale tests involving milligrams of samples are used to optimize fire-retardant coating formulations, but actual applications of these coatings require them to be assessed with structural-scale fire tests. This significant difference in the scale of testing (milligrams to kilograms of sample) raises many questions on the relations between the inherent flammability and thermal characteristics of the coating materials and their “performance” at the structural scale. Moreover, the expected “performance” requirements and the definition of “performance” varies at different scales. In this regard, the pathway is not established when designing and formulating fire-retardant coatings for structural steel sections or members. This manuscript explores the fundamental relationships across different scales of testing with the help of a fire-protective system based on acrylic resin with a typical combination of intumescent additives, viz. ammonium polyphosphate, pentaerythritol, and expandable graphite. One of the main outcomes of this work dictates that higher heat release rate values and larger amounts of material participating in the pyrolysis process per unit time will result in a rapid rise in steel substrate temperature. This information is very useful in the design and development of generic fire-retardant coatings.

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Section: Introductionmentioning

confidence: 99%

Correlating the Performance of a Fire-Retardant Coating across Different Scales of Testing

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Dasari

et al. 2020

Polymers

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“…An evaluation of the testing procedure and comparison with the standard test according to DIN 4102-8 39 was presented in our previous work. 26 The foaming of the sample during the fire test can be observed through a small window in the furnace (Figure 3(a) and (c)).…”

Section: Methodsmentioning

confidence: 99%

“…2,18,23–25 Depending on the environmental conditions, APP may react with MEL, as we discovered in a previous work. 26 Both mechanisms can disrupt the optimum matching of the chemical components in the intumescent coating. 24…”

Section: Introductionmentioning

confidence: 99%

A chain is no stronger than its weakest link: Weathering resistance of water-based intumescent coatings for steel applications

Daus

Schartel

Wachtendorf

et al. 2020

Journal of Fire Sciences

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A systematic approach was used to investigate the weathering-induced degradation of a common water–based intumescent coating. In this study, the coatings are intended for humid indoor applications on steel substrates. The coating contains ammonium polyphosphate, pentaerythritol, melamine, and polyvinyl acetate. By replacing each ingredient with a less water-soluble substance, the most vulnerable substances, polyvinyl acetate and pentaerythritol, were identified. Furthermore, the weathering resistance of the system was improved by exchanging the ingredients. The coatings were stressed by artificial weathering tests and evaluated by fire tests. Thermogravimetry and Fourier-transform infrared spectroscopy were used to study the thermal decomposition. This study lays the foundation for the development of a new generation of water-based intumescent coatings.

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“…In der Fachliteratur wurden bereits Untersuchungen zum Alterungsverhalten von RBS vorgestellt [1][2][3][4][5][6]. Sowohl die thermische Schutzwirkung als auch die Expansion kann durch äußere Umwelteinflüsse abnehmen.…”

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“…Sowohl die thermische Schutzwirkung als auch die Expansion kann durch äußere Umwelteinflüsse abnehmen. Die Degradation wird wesentlich von der chemischen Zusammensetzung des RBS und der Wasserlöslichkeit der einzelnen Bestandteile beeinflusst [1][2][3][4]. Durch die Applikation eines Decklacks kann die Dauerhaftigkeit erheblich verbessert werden [6].…”

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Experimentelle Untersuchungen zur Dauerhaftigkeit von reaktiven Brandschutzsystemen

et al. 2022

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Reaktive Brandschutzsysteme finden im baulichen Brandschutz Anwendung zur Erhöhung des Feuerwiderstands von Stahlkonstruktionen. Neben den Anforderungen an die Feuerwiderstandsdauer können damit auch Ansprüche an die Ästhetik erfüllt werden. Die profilfolgende Applikation und die geringen Trockenschichtdicken der Produkte ermöglichen es, das filigrane Erscheinungsbild von Stahlkonstruktionen aufrechtzuerhalten. Neben der thermischen Schutzwirkung muss auch die Dauerhaftigkeit der Brandschutzbeschichtung sichergestellt werden. Die Bewertungsmethoden, die auf europäischer Ebene durch das EAD 350402‐00‐1106 zur Verfügung stehen, zielen auf eine Nutzungsdauer von zehn Jahren ab. Prüfverfahren für einen darüber hinausgehenden Zeitraum sind nicht beschrieben. In diesem Beitrag werden experimentelle Untersuchungen zum Einfluss der Bewitterung auf das Expansionsverhalten, zur thermischen Schutzwirkung und zu den während des Aufschäumens im Brandfall stattfindenden Reaktionen vorgestellt. Die Versuche wurden an einem wasserbasierten und einem epoxidharzbasierten reaktiven Brandschutzsystem durchgeführt. Die Ergebnisse wurden im Rahmen des IGF‐Forschungsvorhabens 20470 N erzielt.

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High-Throughput Fire Tests and Weathering-Induced Degradation Behaviour of Intumescent Coatings

Cited by 4 publications

References 6 publications

Correlating the Performance of a Fire-Retardant Coating across Different Scales of Testing

Correlating the Performance of a Fire-Retardant Coating across Different Scales of Testing

A chain is no stronger than its weakest link: Weathering resistance of water-based intumescent coatings for steel applications

Experimentelle Untersuchungen zur Dauerhaftigkeit von reaktiven Brandschutzsystemen

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