Combined use of scratch tests and CLA profilometry to characterize polyester powder coatings

Barletta, Massimiliano

doi:10.1016/j.surfcoat.2009.01.010

Cited by 17 publications

(6 citation statements)

References 35 publications

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“…3b-d. Paint coatings have a non-directional surface finish as reported in the literature [2,15,19]. Coating 2.1 exhibits a smoother surface and its roughness is lower than that of aluminum substrate.…”

Section: Roughness and Topographymentioning

confidence: 84%

“…Particularly in the industry, the production of coatings with desired and repeatable properties coatings needs to be investigated [5,14,17]. The specialist literature also reports the studies investigating production process parameters, resistance to corrosion or wear, morphology, adhesion to substrate of powder coatings by different test methods [2,13,16,17].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Repainting on the Mechanical Properties, Surface Topography and Microstructure of Polyester Powder Coatings

Szala¹,

Kot²

2017

Adv. Sci. Technol. Res. J.

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The literature does not provide a systematic analysis of the effect of electrostatic powder coating repainting of structural and constructional aluminum elements on their technological parameters. It is industrial practice that worn or damaged coatings be repainted. It is crucial to determine the effect of electrostatic sprayed coatings repainting on their microstructure, roughness and mechanical properties. The aim of the work is to determinate the influence of repainting of powder deposited polyester coatings on their mechanical properties, roughness and microstructure. This study examined three different electrostatic spray epoxy coatings with matt, silk gloss and fine structure-matt finish. Test panels were prepared as single-and double-layer paint coatings on the aluminum alloy 6060 substrate. Hence, six test sets of coatings were deposited. Each set contained six samples. The microstructure of the cross section of coating was investigated by scanning electron microscopy (SEM) and light optical microscopy (metallographic and stereoscopy microscope). The chemical composition of coating was analyzed by the SEM-EDS method. The 2D surface roughness of single-and double-layer coatings and 3D surface topography maps were examined using a profile measurement gauge. The mechanical properties of coatings were measured by cupping, bending, impact, adhesion to substrate tests run according to standard procedures. As a result, the influence of repainting of polyester powder coatings on their properties was determined. The results demonstrate that repainting has no effect on the microstructure and coating adhesion to substrate as well as the bending test results and roughness of matt and silk gloss coatings. It has been found that repainting affects the results of impact and cupping tests as well as the roughness of samples with fine structure surface finish.

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Section: Roughness and Topographymentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Influence of Repainting on the Mechanical Properties, Surface Topography and Microstructure of Polyester Powder Coatings

Szala¹,

Kot²

2017

Adv. Sci. Technol. Res. J.

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“…Measurements and analysis of the surface topography of replicas made from SILOFLEX dental silicone + Kubišová et al [34] Measurements of the surface topography of White Delrin nylon and timber sample 1) + Islam et al [35] Measurements of surface roughness of the RAFM samples before aluminizing + Purushothaman et al [36] Measurements of topography of the powder and diamond-coated surfaces + Barletta [37], Barletta et al [38], Polini and Barletta [39] Measurements of topography of the as-deposited sample surface (Ti implant) + Komath et al [40] Measurements of surface topography of TiMo biomedical alloys + Ghiban et al [41] Measurements of worn surface topography of AISI type 316 L(N) steel disc + Parthasarathi et al [42] Surface topography of UAM processed aluminium substrates + Li et al…”

Section: Mechanical Engineeringmentioning

confidence: 99%

Optical profilometer with confocal chromatic sensor for high-accuracy 3D measurements of the uncirculated and circulated coins

Kapłonek

Sutowska

Ungureanu

et al. 2018

Journal of Mechanical and Energy Engineering

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The term optical profilometry is used in relation to a group of methods used in a rapid, non-destructive, and non-contact assessment of surface topography. Those methods play a significant role in the area of a modern advanced laboratory and industrial 3D measurements. With the development of profilometric methods, a large progress in the construction of optical profilometric instruments and measuring sensors used in them, including confocal sensors based on the chromatic light aberration phenomenon (CLA) has been observed for several years. The paper shows that the Talysurf CLI 2000 multisensory optical profilometer equipped with a CLA sensor can be used in high-accuracy 3D measurements of the uncirculated and circulated coins. The assessment of such type objects characterized by a high variability of altitude can be extremely helpful in analyzing the actual metrological properties of measuring equipment used in their measurements.

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“…However, too high total air volume blows off the powder particles from the surface of the powder layer deposited on the coating object. The transporting air must be strong enough to guide the particles in the direction of the spray, but the particles will lose their momentum when approaching the target surface and this is where the electrostatic force should be dominant for higher deposition rates [8,9]. The gun-to-part distances also affected the powder FPTE and coating quality [10,11].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Epoxy Powder Coated Galvanized Steel Substrate Through Electrostatic Powder Coating System

Ahmad¹,

Ajer²

2015

Int. J. Automot. Mech. Eng.

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This research deals with the optimization of an electrostatic powder coating by optimizing the combination of total volume of air with the powder output. Generally, the coating's thickness and uniformity are not at the optimum level. A thicker coating does not necessarily provide a good surface quality. This phenomenon is caused by the insufficient volume of air to support the powder reaching the workpiece. Furthermore, too much air also causes the air to blow off the powder on the workpiece. This research aims to identify the optimum combinations of variable parameters to produce the optimum thickness with the best quality by improving the transfer efficiency and specifically to minimize the amount of powder usage. The evaluation methods used to determine the level of coating quality were thickness measurement, Buchholz indentation test, cross-cut test, color visual and surface structure analysis. The instruments used to evaluate the testing samples were a coating thickness gauge, Buchholz indentor, multi-blade cutting tools, spectrophotometer and Scanning Electron Microscope. The optimum level was found when using the optimum combination of powder output and total air volume, which produced a complete single layer of coating film, having good quality in terms of thickness, adhesion, uniformity, indentation resistance and surface structure.

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Combined use of scratch tests and CLA profilometry to characterize polyester powder coatings

Cited by 17 publications

References 35 publications

Influence of Repainting on the Mechanical Properties, Surface Topography and Microstructure of Polyester Powder Coatings

Influence of Repainting on the Mechanical Properties, Surface Topography and Microstructure of Polyester Powder Coatings

Optical profilometer with confocal chromatic sensor for high-accuracy 3D measurements of the uncirculated and circulated coins

Investigation of Epoxy Powder Coated Galvanized Steel Substrate Through Electrostatic Powder Coating System

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