Improvement of corrosion protection system for aluminium body bus used in public transportation

Deflorian, F.; Rossi, Stefano; Prosseda, S.

doi:10.1016/j.matdes.2004.12.008

Cited by 25 publications

(10 citation statements)

References 19 publications

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“…In addition to the type of silane employed during the GO functionalization process [45], the quantity of fillers added to the cataphoretic bath also represents a fundamental parameter in improving the properties of the polymer-based coating [46]. Even though electrodeposition by cataphoresis is a process that is widely used in the industry for the production of organic coatings with excellent adhesion and high corrosion protection properties [47][48][49][50][51], this technique has never been employed to deposit composite layers. However, our previous studies [37,45,46] confirmed that functionalized graphene oxide (fGO) flakes, if properly distributed within the polymeric matrix, promote the corrosion protection performance of cataphoretic coatings.…”

Section: Introductionmentioning

confidence: 99%

Effects of Graphene-Based Fillers on Cathodic Delamination and Abrasion Resistance of Cataphoretic Organic Coatings

et al. 2020

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This study aims to demonstrate the excellent protective performance of functionalized graphene oxide (fGO) flakes in acrylic cataphoretic coatings. The filler content provides an important contribution in improving the chemical and mechanical resistance of the acrylic matrix. The morphology of the fillers was first investigated by optical and electron microscopy, analysing the distribution of the fGO flakes within the polymer matrix. After that, the flakes were added to the cataphoretic bath in different concentrations, resulting in four series of samples. The cathodic delamination of the coatings was assessed with cathodic polarization cycles and with measurements carried out with a scanning Kelvin probe. Finally, the abrasion resistance at the macroscopic and microscopic level was studied by scrub testing and scratching atomic force microscopy analysis, respectively. The incorporation of fGO at the optimized concentration of 0.2 wt.% greatly increases the cathodic delamination resistance of the acrylic matrix, resulting in an effective barrier against the effects of absorbed aggressive substances. Graphene-based fillers also enhance abrasion resistance, thanks to their high mechanical strength. Thus, this work demonstrates the great protective benefits that can be obtained when using fGO flakes as reinforcing fillers in cataphoretic coatings.

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Section: Introductionmentioning

confidence: 99%

Effects of Graphene-Based Fillers on Cathodic Delamination and Abrasion Resistance of Cataphoretic Organic Coatings

et al. 2020

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“…Some of the composite coatings characterized in these studies were made by means of a cataphoretic electrodeposition process, which represents a method for the realization of organic coatings with high adhesion and corrosion protection properties, in a simple and cost-effective way [ 61 , 62 , 63 , 64 ]. Despite the excellent features of this electrodeposition process, the literature offers few works on the addition of fillers in cataphoretic baths.…”

Section: Introductionmentioning

confidence: 99%

Graphene-Based Reinforcing Filler for Double-Layer Acrylic Coatings

et al. 2020

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This study aims to demonstrate the remarkable features of graphene-based fillers, which are able to improve the protective performance of acrylic coatings. Furthermore, the joint application of a cataphoretic primer and a spray top coat, containing graphene and functionalized graphene oxide flakes, respectively, enables the deposition of a double-layer coating with high conductivity and abrasion resistance properties, capable of offering excellent corrosion resistance to the metal substrate. The surface morphology of the single- and double-layer coatings was investigated by optical and electron microscopies, analysing the defectiveness introduced in the polymer matrix due to the filler agglomeration. The behavior in aggressive environments was assessed by exposure of the samples in the salt spray chamber, evaluating the blister formation and the adhesion level of the coatings. Electrochemical impedance spectroscopy measurements were employed to study the corrosion protection properties of the coatings, whose conductivity and abrasion resistance features were analysed by conductivity assessment and scrub tests, respectively. The incorporation of graphene-based fillers in the cataphoretic primer improves the corrosion protection properties of the system, while the graphene flakes provide the top coat spray layer with high conductivity and excellent abrasion resistance features. Thus, this work demonstrates the possibility of employing different types of graphene-based fillers and deposition methods for the creation of multifunctional coatings.

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“…Corrosion of Al and its alloys has been studied extensively in the various aqueous solutions, and theories and models have been developed to illustrate corrosion, especially pitting corrosion of Al [2][3][4][5]. However, there has been limited work investigating the Al corrosion in automotive coolant such as ethylene glycol-water solution.…”

Section: Introductionmentioning

confidence: 99%

Mechanistic aspects of electrochemical corrosion of aluminum alloy in ethylene glycol–water solution

Zhang

Cheng

2008

Electrochimica Acta

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Improvement of corrosion protection system for aluminium body bus used in public transportation

Cited by 25 publications

References 19 publications

Effects of Graphene-Based Fillers on Cathodic Delamination and Abrasion Resistance of Cataphoretic Organic Coatings

Effects of Graphene-Based Fillers on Cathodic Delamination and Abrasion Resistance of Cataphoretic Organic Coatings

Graphene-Based Reinforcing Filler for Double-Layer Acrylic Coatings

Mechanistic aspects of electrochemical corrosion of aluminum alloy in ethylene glycol–water solution

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