The protective properties of epoxy coating electrodeposited on Zn–Mn alloy substrate

Bučko, Mihael; Mišković‐Stanković, Vesna; Rogan, Jelena; Bajat, Jelena B.

doi:10.1016/j.porgcoat.2014.10.010

Cited by 17 publications

(6 citation statements)

References 26 publications

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“…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. The electrodeposition process has exhibited high versatility, as it has been applied to different metal substrates, such as Zn-Mg alloys [16,17], Ti-Mo alloy [18], aluminum alloys [19][20][21], and steel alloys [22]. Furthermore, this method has also been evaluated in synergy with different types of pre-treatments [23,24] to improve the adhesion and durability of the coating.…”

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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“…The automotive industry is the biggest successful example of cathodic electrodeposition application. The cathodic painting has been used to coat automobile bodyworks since its implementation in the 70 s and still remains widely used nowadays due to the advantages previously described (Bodo and Poth, 2012;Bučko et al, 2015). Recent studies in the use of cathodic electrodeposition have dealt with the incorporation of ceria oxide nanoparticles (Živković et al, 2014), graphene (Rossi and Calovi, 2018), SiO 2 (Abd El-Lateef and Khalaf, 2019) into the paint formulation as attempts to improve their anticorrosion properties (Bodo and Poth, 2012).…”

Section: Introductionmentioning

confidence: 99%

Polypyrrole Modified E-Coat Paint for Corrosion Protection of Aluminum AA1200

et al. 2020

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This article reports the potential use of Polypyrrole (PPy) particles as anticorrosive additive on an epoxy water-based paint to increase the corrosion protective property of aluminum-coated panels. AA1200 aluminum panels were painted using the electrophoretic deposition method and the coatings with different concentrations of PPy particles were tested. PPy particles were synthetized by oxidative polymerization of pyrrole (Py) with iron (III) chloride hexahydrate (FeCl 3 .6H 2 O) in the presence of dodecylbenzenesulfonic acid (DBSA). Electrically conducting PPy particles (6.5 S cm −1) were obtained with a size average of 154 nm. The as-prepared PPy particles were added into a water-based epoxy paint and AA1200 panels were coated via electrophoretic deposition method. The corrosion protective properties of e-coated AA1200 panels were evaluated by means of electrochemical impedance spectroscopy over prolonged exposure time in neutral non-aerated 0.1 M sodium chloride NaCl electrolyte. In particular, the addition of 0.4% by weight PPy has improved the coating corrosion protective property with respect to epoxy clearcoat and exhibited the highest value of impedance modulus at low frequency among the studied coatings.

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“…Electrodeposited alloys of Zn-Mn are thermodynamically nobler and more durable than pure Zn coatings (Díaz-Arista et al, 2009;Touazi et al, 2016). These Zn-Mn alloys have been extensively studied (Bozzini et al, 2011;Bucko, Mišković-Stanković, Rogan, & Bajat, 2015;Bucko, Rogan, Stevanovic, Stankovic, & Bajat, 2013a;Close et al, 2016;Ganesan, Prabhu, & Popov, 2014;Griskonis, Fanigliulo, & Sulcius, 2002;Fashu et al, 2015;Marin-Sanchez, Ocon, Conde, & Garcia, 2014;Wykpis, Bierska-Piech, & Kubisztal, 2014) because they offer good corrosion resistance (Bozzini et al 1999;Claudel et al, 2019;Ganesan et al, 2014;Louki & Feki, 2017a, 2017b, weldability, paintability (Fashu et al, 2015), appearance (Silva, Schmitz, Spinelli, & Garcia, 2012), mechanical properties, particularly plasticity (Bozzini et al, 1999) as well as hardness, tensile and compressive strength and improved passivation behavior in chloride medium (Bozzini et al, 1999;Díaz-Arista et al, 2009;Bucko, Lacnjevac, & Bajat, 2013b). Furthermore, there is a particular interest in these Zn-Mn alloys in the automotive industry (Ananth & Parthasaradhy, 1996;Muller, Sarret, & Andreu, 2003a;2003b;Silva et al, 2012) and for steel cable and plate coatings because they offer better adhesion between steel and polymer blends and easy adhesion of paint-even when the Mn content is low (Bozzini et al, 1999).…”

Section: Introductionmentioning

confidence: 99%

“…Additives such as thiourea (Sulcius, Griskonis, & Diaz-Arista, 2009), selenous acid and ammonium selenate (Griskonis & Sulcius, 2005), sulphate, sulphate-citrate (Wilcox & Gabe, 1993;Bozzini et al, 2002), thiocarbamide (Bozzini et al, 2002), EDTA-citrate (Muller et al, 2003a;2003b), polyethylene glycol (Ortiz, Diaz-Arista, Meas, Ortega-Borges, & Trejo, 2009), cyanide, ammonium thiocyanate (Díaz-Arista et al, 2009;Ortiz et al, 2009;Close et al, 2016), fluoroborate (Bucko et al, 2011), chloride (Claudel et al 2019;Ganesan et al, 2014;Louki & Feki, 2017a, 2017bMarin-Sanchez et al, 2014;Sylla et al, 2005) and different solvents (Bucko et al, 2017(Bucko et al, ,2018Chung et al, 2008) have been shown to affect the manganese content in the electrodeposit (Wilcox & Gabe, 1993;Bucko et al, 2013a). Nevertheless, these electrolytes have limitations including instability (Brenner, 1963), toxicity (Wilcox & Gabe, 1993), corrosiveness and precipitation of the Mn (Bozzini et al, 1999;Bucko et al, 2015;Silva et al, 2012). The influence of boric-sorbitol complex (BSC) (Rubin, Oliveira, & Carlos, 2012) on the composition of the Zn-Mn alloy was studied, and this additive inhibited the deposition of manganese.…”

Section: Introductionmentioning

confidence: 99%

The influence of glycerol as an additive in Zinc-Manganese alloy coatings formed by electrodeposition

et al. 2019

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The aim of this investigation is to evaluate the influence of glycerol (a nontoxic additive) on Zn-Mn coatings formed by electrochemical deposition. The influence of glycerol (GLY) on the electrodeposition of Zn-Mn alloys on Pt from acid baths was studied by cyclic voltammetry. The coatings were analyzed by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The Zn-Mn alloys prepared in the absence or presence of this additive showed similar voltammograms except when using GLY and boric acid (BA) concentrations at 0.63 and 0.24 M, respectively. The current efficiency of the Zn-Mn electrodeposition process ranged from 5 to 41%, due to the lowest and highest concentrations of GLY and BA, respectively. SEM images of deposits obtained at -1.53 V from baths containing 0.08-0.48 M GLY were dendritic, while those formed in the presence of 0.63 M GLY showed that GLY acted as a brightener at this concentration. The XRD analysis showed that the electrodeposits contained Zn, Mn, oxides as well as alloys of various compositions. GLY acted as a grain refiner and inhibited the codeposition of Zn with Mn and the formation of oxides.

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The protective properties of epoxy coating electrodeposited on Zn–Mn alloy substrate

Cited by 17 publications

References 26 publications

Durability of Acrylic Cataphoretic Coatings Additivated with Colloidal Silver

Durability of Acrylic Cataphoretic Coatings Additivated with Colloidal Silver

Polypyrrole Modified E-Coat Paint for Corrosion Protection of Aluminum AA1200

The influence of glycerol as an additive in Zinc-Manganese alloy coatings formed by electrodeposition

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