An investigation of the influence of physical vapour deposited aluminium layers on the kinetics of organic coating disbondment on iron

Reynolds, G.J.; Barrett, Zak; McMurray, H. N.; Williams, Geraint

doi:10.1016/j.corsci.2013.01.015

Cited by 10 publications

(10 citation statements)

References 46 publications

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“…The products of the ORR, OHor reactive ) the sample configuration for study of corrosion driven coating disbondment using in situ SKP. 34 intermediates, are believed to attack the bond between the PVB coatings and metallic substrate, this resulting in loss of coating adhesion. 37 The sharp increase in potential that occurs at the boundary between the delaminated and intact coating can be used as a semi-empirical means by which to locate the position of the delamination front.…”

Section: Resultsmentioning

confidence: 99%

“…Thin metallic layers were sputtered on to the steel substrate using a Kurt J Lesker PVD75 Physical Vapour Deposition system following a procedure described previously to apply aluminium 34 and magnesium 35 PVD wedge coatings. Samples were attached to the sample holder using countersink head machine screws in order to keep them flat.…”

Section: Methodsmentioning

confidence: 99%

“…The intention of the current work is therefore to build upon the findings obtained that showed that corrosion driven cathodic disbondment of a PVB coating, from production line chromium (III) metal-oxide-carbide coated steel, decreased with increased chromium oxide thickness. It does so by following a methodology used previously for aluminium 34 and magnesium based coatings, 35 to apply a chromium and chromium (III) oxide wedge of graded thickness to a steel substrate using PVD. This allows one to determine the specific role that either the metallic chromium layer thickness (t Cr ), or 2.)…”

mentioning

confidence: 99%

“…the use of masking tape and PVB to produce a "Stratmann" cell and (b.) the sample configuration for study of corrosion driven coating disbondment using in situ SKP 34.…”

mentioning

confidence: 99%

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The Use of Chromium and Chromium (III) Oxide PVD Coatings to Resist the Corrosion Driven Coating Delamination of Organically Coated Packaging Steel

Wint

Warren

deVooys

et al. 2020

J. Electrochem. Soc.

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This paper describes a systematic study into the role of chromium and chromium (III) oxide thickness in preventing corrosion driven coating disbondment of organically coated packaging steel. A graded wedge of chromium and chromium (III) oxide is applied to steel using physical vapour deposition (PVD). A polyvinyl butyral (PVB) overcoat is applied and corrosion is initiated from an artificial defect using NaCl. Scanning Kelvin probe (SKP) potentiometry is used to monitor coating delamination. Wedge thickness variation allows for high throughput investigations into the effect of both metallic chromium and chromium (III) oxide thickness, on coating disbondment rate. A linear reciprocal relationship is observed between chromium metal thickness and disbondment rate. Increasing chromium (III) oxide thickness (applied over chromium metal) results in a decrease in delamination rate. This work highlights the ability of PVD to produce chromium/chromium (III) oxide corrosion resistant coatings to use as alternatives to hexavalent chromium-based systems.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

mentioning

confidence: 99%

“…the use of masking tape and PVB to produce a "Stratmann" cell and (b.) the sample configuration for study of corrosion driven coating disbondment using in situ SKP 34.…”

mentioning

confidence: 99%

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The Use of Chromium and Chromium (III) Oxide PVD Coatings to Resist the Corrosion Driven Coating Delamination of Organically Coated Packaging Steel

Wint

Warren

deVooys

et al. 2020

J. Electrochem. Soc.

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“…1a) of continuously varied thickness. 13,15,16 By superimposing wedges of dissimilar metals, and then annealing to produce thermal interdiffusion, a single-substrate combinatorial library of alloy composition can once again be created.…”

mentioning

confidence: 99%

Combinatorial Studies into the Effect of Thermally Inter-Diffused Magnesium on the Kinetics of Organic Coating Cathodic Delamination from Zinc Galvanized Steel

Wint

Barrett

McMurray

et al. 2020

J. Electrochem. Soc.

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This paper describes a high-throughput study into the role of Mg in preventing corrosion driven coating disbondment of organic coatings from Zn-Mg alloy galvanized steel. A graded Mg wedge is applied to a hot-dip zinc galvanised steel substrate using physical vapour deposition, and subsequently annealed to produce metallic inter-diffusion and formation of Mg2Zn11 intermetallic. An overcoat of electrically insulating polyvinyl butyral (PVB) is applied and corrosion is initiated from a penetrative coating defect using an aqueous electrolyte. The variation in Mg coating weight across the wedge facilitates a systematic investigation of the effect of Mg on Volta potential and the rate of corrosion driven cathodic coating disbondment using scanning Kelvin probe (SKP) potentiometry. The rate of cathodic disbondment is shown to decrease rapidly even at very low Mg coating weight (corresponding to 25 nm thickness before annealing). The results are explained in terms of the galvanic polarity of the corrosion cell formed between Zn exposed at the defect site, and the intact Zn-Mg layer at the metal-organic coating interface.

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Cathodic Disbondment of Unpigmented Epoxy Coatings: Effect of Thickness, pH, and Curing Conditions

Sharifabadi

Hassanpour

Attar

2020

Eco-Friendly and Smart Polymer Systems

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An investigation of the influence of physical vapour deposited aluminium layers on the kinetics of organic coating disbondment on iron

Cited by 10 publications

References 46 publications

The Use of Chromium and Chromium (III) Oxide PVD Coatings to Resist the Corrosion Driven Coating Delamination of Organically Coated Packaging Steel

The Use of Chromium and Chromium (III) Oxide PVD Coatings to Resist the Corrosion Driven Coating Delamination of Organically Coated Packaging Steel

Combinatorial Studies into the Effect of Thermally Inter-Diffused Magnesium on the Kinetics of Organic Coating Cathodic Delamination from Zinc Galvanized Steel

Cathodic Disbondment of Unpigmented Epoxy Coatings: Effect of Thickness, pH, and Curing Conditions

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