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Improved method to quantify pore size and shape distributions in intumescent coating chars
Intumescent coatings are widely used as passive fire protection for steel elements in buildings and industrial platforms. At elevated temperatures, several reactions in combination induce the expansion and foaming of the coating. As a result, a cellular char is produced, providing thermal insulation to the steel beams. Experimental studies in this field, together with the results from other areas, such as metallic foams, highlight the importance of pore size and shape distributions for the insulation properties of these materials [1,2]. Thereby, conducting a quantitative analysis of the internal morphology can provide valuable insights into the performance of intumescent coatings. Fluorescent microscopy images demonstrate the interconnectivity among pores within intumescent coating [3]. The challenge arises during the specification of the boundaries between these pores, where the definitions remain unclear. The watershed algorithm is a popular technique for segmenting the pore space [4]. Figure 1 a) depicts the equivalent pore diameter map obtained with this method. Each color represents a single pore. It can be observed that this method tends to over-segmentate the pore space, especially for large elliptical pore regions, resulting in an unrealistic representation. To mitigate the effect of oversegmentation, a refined algorithm has been designed. It employs the simulation of intrusion techniques to effectively find the pores. Figure 1 b) illustrates the result of this method. It is noticeable that the oversegmentation has significantly decreased. The clearest example can be observed on the big area coloured with yellow in Figure 1 b). According to the initial segmentation, this pore should be segmentated into 6 different units, which, from a morphological perspective, does not appear realistic. The new method was used to analyse different intumescent chars. The results show the method´s capability to measure pores ranging from 1 μm to 8 mm with different shapes, highlighting its versatility for applications in ...
Improved method to quantify pore size and shape distributions in intumescent coating chars
Intumescent coatings are widely used as passive fire protection for steel elements in buildings and industrial platforms. At elevated temperatures, several reactions in combination induce the expansion and foaming of the coating. As a result, a cellular char is produced, providing thermal insulation to the steel beams. Experimental studies in this field, together with the results from other areas, such as metallic foams, highlight the importance of pore size and shape distributions for the insulation properties of these materials [1,2]. Thereby, conducting a quantitative analysis of the internal morphology can provide valuable insights into the performance of intumescent coatings. Fluorescent microscopy images demonstrate the interconnectivity among pores within intumescent coating [3]. The challenge arises during the specification of the boundaries between these pores, where the definitions remain unclear. The watershed algorithm is a popular technique for segmenting the pore space [4]. Figure 1 a) depicts the equivalent pore diameter map obtained with this method. Each color represents a single pore. It can be observed that this method tends to over-segmentate the pore space, especially for large elliptical pore regions, resulting in an unrealistic representation. To mitigate the effect of oversegmentation, a refined algorithm has been designed. It employs the simulation of intrusion techniques to effectively find the pores. Figure 1 b) illustrates the result of this method. It is noticeable that the oversegmentation has significantly decreased. The clearest example can be observed on the big area coloured with yellow in Figure 1 b). According to the initial segmentation, this pore should be segmentated into 6 different units, which, from a morphological perspective, does not appear realistic. The new method was used to analyse different intumescent chars. The results show the method´s capability to measure pores ranging from 1 μm to 8 mm with different shapes, highlighting its versatility for applications in ...
Improved method to quantify pore size and shape distributions in intumescent coating chars
Labaien Etxeberria, Ander (author) / Dreyer, Jochen (author) / Kiil, Søren (author)
2024-01-01
Labaien Etxeberria , A , Dreyer , J & Kiil , S 2024 , ' Improved method to quantify pore size and shape distributions in intumescent coating chars ' , International Conference on Cellular Materials , Magdeburg , Germany , 27/11/2024 - 29/11/2024 .
Conference paper
Electronic Resource
English
DDC:
624
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