Study on preparation and fire-retardant mechanism analysis of intumescent flame-retardant coatings

Gu, Junwei; Zhang, Guang-cheng; Dong, Shizhi; Zhang, Qiuyu; Kong, Jie

doi:10.1016/j.surfcoat.2007.03.020

Cited by 362 publications

(210 citation statements)

References 3 publications

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“…Coatings in particular and coating systems in general play welldefined actions against fire action [7][8][9][10][11][12][13][14][15][16][17][18][19]; they may…”

Section: Fire Action On Materialsmentioning

confidence: 99%

Introductory Chapter: Protection of Materials

Canosa¹,

Giúdice²

2017

New Technologies in Protective Coatings

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Additional information is available at the end of the chapter http://dx.doi.org/10.5772/intechopen.69853 IntroductionThe science and technology of materials have as objective provided access to specific knowledge in this field and besides generated matters of interest for the development of original researches leading to new materials and, as a consequence, to proper protection methods to achieve high economic impact.Since iron and steels constitute a group of widely used materials in civil and industrial construction, this chapter describes firstly the fundamental concepts of metal corrosion and the most frequent failures originating on service. Besides, in this chapter, it was considered of interest to include aspects inherent to the physicochemistry of fire and its mechanism of spreading because of the significant human and material losses produced year after year by action of the fire.It is appropriate to mention that the different chapters of this book describe innovative methods of surface treatment to control the kinetics of metallic corrosion and the action of fire on several materials. Metallic corrosion and failuresAccidents arising from the metallic corrosion can produce injury or death of people by explosion, fire, and so on. The economic losses are classified into direct and indirect; the first includes the replacement of corroded materials, labor, periodic maintenance (coatings, cathodic protection, inhibitors in closed circuits, etc.) while the last involve aspects such as the discontinuity in the productive system, the loss and the contamination of raw materials and finished goods, and so on. The indirect losses are usually between 8 and 10 times the direct ones.In industrialized countries, the total economic losses reach values between 3.5 and 4.5% of gross national product, despite applying all available technologies. It should also be mentioned

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“…Coatings in particular and coating systems in general play welldefined actions against fire action [7][8][9][10][11][12][13][14][15][16][17][18][19]; they may…”

Section: Fire Action On Materialsmentioning

confidence: 99%

Introductory Chapter: Protection of Materials

Canosa¹,

Giúdice²

2017

New Technologies in Protective Coatings

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“…Interestingly, all of the samples illustrate the similar trend of curve. [12]. On the second phase, the temperature decrease dramatically due to decomposition of main coating's ingredients [7].…”

Section: Thermal Stabilitymentioning

confidence: 99%

Effects of Hybrid Fibre Reinforcement on Fire Resistance Performance and Char Morphology of Intumescent Coating

Amir

Majid

Ahmad

2016

MATEC Web of Conferences

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Abstract. Recent researches of fire retardant intumescent coatings reinforced by single Rockwool and single glass wool fibre at various weight percentages and lengths showed some improvements to the mechanical properties of the coatings and the char produced. Therefore, in this research the fibres were combined together in intumescent coating formulation at several weight percentages and fibre lengths to study their effects towards fire resistance performance and char morphology. The hybrid fibre reinforced intumescent coatings were subjected to two types of fire tests; Bunsen burner at 1000 o C and the electric furnace at 800 o C for 1 hour, respectively. Steel temperature of the coated samples during Bunsen burner test was recorded to determine the fire resistance performance. Thermal stability of the intumescent coatings and chars was determined by Thermogravimetric Analysis (TGA). The morphology of the coatings and char was then examined by using Scanning Electron Microscopy (SEM) and Energy Dispersive Spectrometry (EDS) was conducted to obtain elemental composition of the samples. This research concluded that long-hybrid fibre at 12-mm length and 0.6% fibre-weight produced the top performing hybrid fibre intumescent formulation. The hybrid fibres form survived at elevated temperature, hence helped to provide structure and strengthen the char with the highest fire resistance was recorded at steel temperature of 197 o C.

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“…Intumescent coatings are heat shielding coatings which degrade at high temperature to form an insulative heat layer [4][5][6]; this is an emerging technology in the fire protection of structural steels. BR contains thermally stable metal oxides, zeolitic mineral hydrates and fuel diluting carbonates which are usually employed as synergistic fillers in IC [7].…”

Section: Introductionmentioning

confidence: 99%

Ball milled bauxite residue as a reinforcing filler in phosphate-based intumescent system

et al. 2018

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Bauxite residue (BR) is an alumina refinery waste with a global disposal problem. Of the 120 MT generated annually, only 3 MT is disposed via utilization. One of the significant challenges to sustainable utilization has been found to be the cost of processing. In this work, using ball milling, we achieved material modification of bauxite residue. Spectrometric imaging with FESEM showed the transformation from an aggregate structure to nano, platy particulates, leading to particle size homogeneity. BET analysis showed surface area was increased by 23%, while pH was reduced from 10.8 to 9.1 due to collapsing of the hydroxyl surface by the fracturing action of the ball mill. Incorporation of this into a phosphate-based fire retardant, intumescent formulation led to improved material dispersion and the formation of reinforcing heat shielding char nodules. XRD revealed the formation of ceramic metal phosphates which acted as an additional heat sink to the intumescent system, thereby reducing char oxidation and heat transfer to the substrate. Steel substrate temperature from a Bunsen burner test reduced by 33%. Therefore, ball milling can serve as a simple, low-cost processing route for the reuse of bauxite residue in intumescent composites.

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Study on preparation and fire-retardant mechanism analysis of intumescent flame-retardant coatings

Cited by 362 publications

References 3 publications

Introductory Chapter: Protection of Materials

Introductory Chapter: Protection of Materials

Effects of Hybrid Fibre Reinforcement on Fire Resistance Performance and Char Morphology of Intumescent Coating

Ball milled bauxite residue as a reinforcing filler in phosphate-based intumescent system

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