Characterizing the Relaxation of the Open-Circuit Potential during an AC-DC-AC Accelerated Test

Allahar, Kerry N.; Upadhyay, Vinod; Bierwagen, Gordon P.

doi:10.5006/1.3490306

Cited by 10 publications

(4 citation statements)

References 22 publications

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“…The AC-DC-AC method represents an accelerated cyclic test, consisting of a combination of EIS measurements (AC) and cathodic polarisation (DC), employed to study the adhesion between substrate and organic coatings [52,58,59]. In the past, this characterization technique has also been used for the optimization of the cataphoretic deposition process, determining the deposition voltages for the highest corrosion protection properties of an epoxy primer [60].…”

Section: Ac-dc-ac Testmentioning

confidence: 99%

“…The wet abrasion resistance of the coatings was assessed by subjecting the samples to wear cycles caused by an abrasive pad (3 × 8 × 1 cm 3 ), with the support of 2.5 g/L sodium ndodecylbenzenesulfonate solution [59]. The weight loss of the samples was monitored every 200 abrasion cycles, calculating L, the loss in coating mass per unit area, from the following: (1) where m0 and mn are the sample's initial weight and the weight after the n th cycle, respectively, while A represents the area traversed by the scrub pad over the coating's surface.…”

Section: Scrub Testmentioning

confidence: 99%

“…The wet abrasion resistance of the coatings was assessed by subjecting the samples to wear cycles caused by an abrasive pad (3 × 8 × 1 cm 3 ), with the support of 2.5 g/L sodium n-dodecylbenzenesulfonate solution [59]. The weight loss of the samples was monitored every 200 abrasion cycles, calculating L, the loss in coating mass per unit area, from the following:…”

Section: Scrub Testmentioning

confidence: 99%

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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: Ac-dc-ac Testmentioning

confidence: 99%

Section: Scrub Testmentioning

confidence: 99%

Section: Scrub Testmentioning

confidence: 99%

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

et al. 2020

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“…These methods promote coating failure in shorter times compared to failure times associated with normal service conditions. 24,25…”

Section: Introductionmentioning

confidence: 99%

Comparison of corrosion protection of normal and galvanised steel coated by cathodic electrocoatings using EIS and salt spray tests

Esfahani

Ranjbar

Rastegar

2016

Corrosion Engineering, Science and Technology

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Cathodic electrocoatings were applied onto phosphated normal and galvanised steel substrates with average dry film thicknesses of 20 and 12 mm. To evaluate the anticorrosion properties of the coatings, electrochemical impedance spectroscopy and salt spray tests were carried out on the samples. The results showed that, by increasing the curing temperature, the protective properties of electrocoated galvanised steel are improved to a higher extent compared to normal steel panels. This was indicated by a pore resistance of two orders of magnitude higher in the case of galvanised steel panels. At lower curing temperatures, the corrosion resistance of electrocoated normal steel panels is better than that of the galvanised steel, indicated by a two orders of magnitude higher pore resistance value. On the other side, the salt spray test could not recognise the difference between protective properties of different coating films on galvanised steel suitably, and this is one of the notable disadvantages of this test.

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Corrosion of Aluminum and Aluminum Alloys Used for Rolling Stock

Rashidov,

Abdullaev,

Rakhimov

2023

Met Sci Heat Treat

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Characterizing the Relaxation of the Open-Circuit Potential during an AC-DC-AC Accelerated Test

Cited by 10 publications

References 22 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

Comparison of corrosion protection of normal and galvanised steel coated by cathodic electrocoatings using EIS and salt spray tests

Corrosion of Aluminum and Aluminum Alloys Used for Rolling Stock

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