The Comparative Analysis of the Coatings Deposited on the Automotive Parts by the Cataphoresis Method

Skotnicki, Wojciech; Jędrzejczyk, D.

doi:10.3390/ma14206155

Cited by 8 publications

(12 citation statements)

References 36 publications

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“…Thanks to these aspects, cataphoresis is often successfully employed in the automotive industry [9][10][11], but in recent years it has also aroused particular interest in the researchacademic field. In fact, several works have turned to the optimization of the process equipment [12,13] and parameters, such as the curing temperature [14] and the deposition voltage [15], in order to further improve the behavior of the cataphoretic layers.…”

Section: Introductionmentioning

confidence: 99%

Durability of Acrylic Cataphoretic Coatings Additivated with Colloidal Silver

Calovi

Rossi

2022

Coatings

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In this work, colloidal silver has been added into an acrylic clear cataphoretic bath, evaluating the effect of two different filler amounts on the durability of the composite coatings. The three series of samples were characterized by electron microscopy to assess the possible change in morphology introduced by the silver-based additive. The protective properties of the coatings were evaluated by a salt spray chamber exposure and electrochemical impedance spectroscopy measurements, evidencing the negative effect provided by high amount of silver, which introduced discontinuities in the acrylic matrix. Finally, the durability of composite coatings was studied by exposing them to UV-B radiation, observing a strong phenomenon of silver degradation. Although the coating containing high concentrations of silver demonstrated poor durability, this study revealed that small amounts of silver can be used to provide particular aesthetic features, but also to improve the protective performance of cataphoretic coatings.

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Section: Introductionmentioning

confidence: 99%

Durability of Acrylic Cataphoretic Coatings Additivated with Colloidal Silver

Calovi

Rossi

2022

Coatings

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“…At the same time, the interaction of the voltage and deposition time accounted for 20.25% of the change in the thickness of the layer formed. The nonlinear model elements (5), namely, the voltage squared and the deposition time squared, accounted for 5.94% and 11.32%, respectively, of the change in the thickness of the created layer. As seen in Table 4 and model (5), it was clear that the processes of the surface treatment of the metals, including the cataphoresis varnishing, were best described by non-linear models with a significant influence and mutual interaction of the individual factors.…”

Section: Resultsmentioning

confidence: 99%

“…The nonlinear model elements (5), namely, the voltage squared and the deposition time squared, accounted for 5.94% and 11.32%, respectively, of the change in the thickness of the created layer. As seen in Table 4 and model (5), it was clear that the processes of the surface treatment of the metals, including the cataphoresis varnishing, were best described by non-linear models with a significant influence and mutual interaction of the individual factors. The model ( 5) also needed to be expanded and modified by the influence of the chemical factors acting in the process of the cataphoresis varnishing.…”

Section: Resultsmentioning

confidence: 99%

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A Determination of the Influence of Technological Parameters on the Quality of the Created Layer in the Process of Cataphoretic Coating

Dobránsky,

Gombár,

Fejko

et al. 2023

Metals

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Cataphoresis varnishing enables an organic coating to form on an aluminum substrate, thus increasing its corrosion resistance and durability. Cataphoresis varnishing is known to ensure a high adhesion of the created cataphoresis layer and a good homogeneity of this layer, even on surfaces with complex geometry. This paper aimed to optimize the deposition process and to analyze and evaluate the thickness of a cataphoresis layer formed on an aluminum substrate from AW 1050—H24 material. In total, 30 separate samples were created in accordance with the Design of Experiments methodology, using a central composite plan. The independent input factors in the study were: the electrical voltage (U) and deposition time in the cataphoresis varnishing process (tKTL) at the polymerization times of 15 min, 20 min, and 25 min, respectively. The results of the statistical analysis showed that the voltage accounted for 33.82% of the change in the thickness of the created layer and the deposition time contributed 28.67% to thi change. At the same time, the interaction of the voltage and deposition time (p < 0.0001) accounted for 20.25% of the change in the thickness of the layer under formation. The regression model that was constructed showed a high degree of prediction accuracy (85.8775%) and its use as a function for nonlinear optimization provided a maximum layer thickness th of max = 26.114 µm, at U = 240 V and tKTL = 6.0 min, as was proven under experimental conditions.

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“…Cataphoresis coatings are widely used for corrosion protection of metal surfaces. In this method, the metal substrate is immersed in an electrolyte coating bath and an electric current form a thin film [15]. A cataphoretic coating offers an aesthetic appearance, a long service life and resistance to corrosion.…”

Section: Introductionmentioning

confidence: 99%

Effect of Adhesion and Corrosion Performance of Geomet Basecoat (321)- Topcoat (ML Black) Applications on Cataphoretic Coating

USTA,

YILMAZ,

GÜL

et al. 2024

Sakarya University Journal of Science

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The primary objective of the research was to improve the corrosion resistance and adhesion properties of metallic materials commonly used in the automotive industry. In order to achieve a higher level of corrosion protection, a combination of Cataphoretic and Geomet coatings has been applied. The first stage involved applying a cataphoretic coating and then improving the corrosion properties by sequentially applying Geomet 321 (second layer) and ML Black (third layer) over the cataphoretic base. The evaluation included the influence of sandblasting pre-treatment and various post-cataphoresis curing temperatures (ranging from 150 to 230 °C), focusing on their effect on both adhesion and corrosion properties. The results of the corrosion tests were classified into different categories: adhesion, water resistance, moisture resistance, salt resistance and cyclic tests. According to these results showed that the most favourable corrosion resistance was achieved by a three-layer coating approach (Cataphoresis+ Geomet 321+ Geomet ML Black), combined with sandblasting preparation and curing at 210 °C. It has been shown that the corrosion properties of two- and three-layer coatings improve depending on both the sandblasting pre-treatment and the curing temperature after cataphoresis.

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The Comparative Analysis of the Coatings Deposited on the Automotive Parts by the Cataphoresis Method

Cited by 8 publications

References 36 publications

Durability of Acrylic Cataphoretic Coatings Additivated with Colloidal Silver

Durability of Acrylic Cataphoretic Coatings Additivated with Colloidal Silver

A Determination of the Influence of Technological Parameters on the Quality of the Created Layer in the Process of Cataphoretic Coating

Effect of Adhesion and Corrosion Performance of Geomet Basecoat (321)- Topcoat (ML Black) Applications on Cataphoretic Coating

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