Voltammetric and impedance studies of the electropolishing of type 316 stainless steel in a choline chloride based ionic liquid

Abbott, Andrew P.; Capper, Glen; McKenzie, Katy J.; Ryder, Karl S.

doi:10.1016/j.electacta.2005.12.030

Cited by 193 publications

(132 citation statements)

References 21 publications

(20 reference statements)

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“…A new process has been developed for electropolishing stainless steel using a choline chloride/ethylene glycol eutectic. [59][60][61] The operating conditions are similar to the existing acid based solutions and represent simple drop-in replacement technology. Abbott et al 60 have shown that the electropolishing mechanism is fundamentally different in an ionic liquid to an aqueous acid solution.…”

Section: Electropolishing Of Stainless Steelmentioning

confidence: 99%

“…[59][60][61] The operating conditions are similar to the existing acid based solutions and represent simple drop-in replacement technology. Abbott et al 60 have shown that the electropolishing mechanism is fundamentally different in an ionic liquid to an aqueous acid solution. No passivating layer is formed on the electrode in an ionic liquid and this decreases the ohmic resistance of the cell.…”

Section: Electropolishing Of Stainless Steelmentioning

confidence: 99%

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Electrofinishing of metals using eutectic based ionic liquids

Abbott¹,

Ryder²,

König³

2008

Transactions of the IMF

165

114

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Ionic liquids are molten salts that have low melting points. This review concentrates upon eutectic mixtures of quaternary ammonium salts and metal salts (usually halides). These so-called eutectic based ionic liquids can be used for the electrodeposition and dissolution of a wide range of metals and alloys. The review highlights the technological challenges involved in the application of ionic liquids to metal finishing.

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Section: Electropolishing Of Stainless Steelmentioning

confidence: 99%

Section: Electropolishing Of Stainless Steelmentioning

confidence: 99%

Electrofinishing of metals using eutectic based ionic liquids

Abbott¹,

Ryder²,

König³

2008

Transactions of the IMF

165

114

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“…18 We have previously shown 19 that ethylene glycol can also be used as the hydrogen bond donor, and that mixtures of ethylene glycol with choline chloride can be used for the electropolishing of stainless steel. 20 This process has three main advantages over the commercial alternative: (i) high current efficiencies are obtained; (ii) gas evolution at the anode/solution interface during polishing is negligible; and (iii) the liquid used is comparatively benign and non-corrosive compared to the current aqueous acid solutions. In a previous study we have presented a.c. impedance, linear sweep voltammetry (LSV) and chronoamperometric data in an attempt to investigate the mechanism of electropolishing in these glycol mixtures.…”

Section: Introductionmentioning

confidence: 99%

“…In a previous study we have presented a.c. impedance, linear sweep voltammetry (LSV) and chronoamperometric data in an attempt to investigate the mechanism of electropolishing in these glycol mixtures. 20 An interpretation of the data from that study, focussed specifically on 316 grade stainless steel, suggested that the formation and dissolution of a metal oxide passivation layer at the metal-liquid interface is a key feature of the metal dissolution mechanism and one that ultimately determines the quality of the optical finish (i.e. the surface roughness).…”

Section: Introductionmentioning

confidence: 99%

Electropolishing of stainless steels in a choline chloride based ionic liquid: an electrochemical study with surface characterisation using SEM and atomic force microscopy

Abbott

Capper

McKenzie

et al. 2006

Phys. Chem. Chem. Phys.

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184

114

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We have studied the anodic dissolution (electropolishing) of various stainless steel alloys in an ionic liquid comprising a 2 : 1 stoichiometric mix of ethylene glycol (EG) and choline chloride. We have used a combination of electrochemical and spectroscopic methods together with in situ liquid probe microscopy. We discuss the role and influence of the surface oxide passivation layer, characterized here by X-ray photoelectron spectroscopy (XPS) and linear sweep voltammetry, on the polishing process. We address the question of dealloying during the polish in order to contribute to our understanding of the viability of the ionic liquid as a replacement industrial electropolishing medium; the current commercial process uses a corrosive mixture of phosphoric and sulfuric acids. Also, we present data from ex situ and in situ liquid AFM studies giving both a qualitative and quantitative insight into the nature and scale of morphological changes at the steel surface during the polishing process.

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“…These are simple mixtures of salts and hydrogen bond donor compounds such as alcohols, acids, halides, amines, amino acids and many more. Deep eutectic solvents (DESs) are regarded as ionic liquids analogues because they share many of their intrinsic favorable properties such as their bio-degradability, non-flammability due to their low or none measurable vapor pressure and low toxicity [1], [2] and [9]. Moreover, the fact that they are synthesized at conditions close to room temperature reduces their cost and makes them readily available for probable industrial scales.…”

Section: Introductionmentioning

confidence: 99%