Hydrogen absorption by very strong steel during chemical descaling

Glasgow, I.R.; Rostron, A.J.; Thomson, G. P.

doi:10.1016/s0010-938x(66)80054-9

Cited by 4 publications

(3 citation statements)

References 3 publications

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“…Decontamination of Uranium-Contaminated Coupons. On the basis of our previous studies on the remediation of uranium- and toxic-metal-contaminated soils () and examination of the literature ( − ), we tested the ability of citric acid alone and in combination with hydrogen peroxide and oxalic acid to remove uranium from the coupons. Initial testing of the contaminated coupons using varying concentrations of citric acid (0.05−0.2 M) resulted in removal of 50−60% of the uranium.…”

Section: Methodsmentioning

confidence: 99%

Decontamination of Uranium-Contaminated Steel Surfaces by Hydroxycarboxylic Acid with Uranium Recovery

et al. 2005

Environ. Sci. Technol.

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We developed a simple, safe method to remove uranium from contaminated metallic surfaces so that the materials can be recycled or disposed of as low-level radioactive or nonradioactive waste. Surface analysis of rusted uranium-contaminated plain carbon-steel coupons by X-ray photoelectron spectroscopy and Rutherford backscattering spectroscopy showed that uranium was predominantly associated with ferrihydrite, lepidocrocite, and magnetite, or occluded in the matrix of the corrosion product as uranyl hydroxide and schoepite (UO3 x 2H2O). Citric acid formulations, consisting of oxalic acid-hydrogen peroxidecitric acid (OPC) or citric acid-hydrogen peroxidecitric acid (CPC), were used to remove uranium from the coupons. The efficiency of uranium removal varied from 68% to 94% depending on the extent of corrosion, the association of uranium with the iron oxide matrix, and the accessibility of the occluded contaminant. Decontaminated coupons clearly showed evidence of the extensive removal of rust and uranium. The waste solutions containing uranium and iron from decontamination by OPC and CPC were treated first by subjecting them to biodegradation followed by photodegradation. Biodegradation of a CPC solution by Pseudomonas fluorescens resulted in the degradation of the citric acid with concomitant precipitation of Fe (>96%), whereas U that remained in solution was recovered (>99%) by photodegradation as schoepite. In contrast, in an OPC solution citric acid was biodegraded but not oxalic acid, and both Fe and U remained in solution. Photodegradation of this OPC solution resulted in the precipitation of iron as ferrihydrite and uranium as uranyl hydroxide.

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Section: Methodsmentioning

confidence: 99%

Decontamination of Uranium-Contaminated Steel Surfaces by Hydroxycarboxylic Acid with Uranium Recovery

et al. 2005

Environ. Sci. Technol.

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“…3 Acids are used in many industrial processes for pickling, cleaning, de-scaling of metals and also to acidify oil wells. 4,5 Application of organic inhibitors is the most important and practical method for the protection of metallic corrosion. 6,7 Widely used organic inhibitors contain nitrogen, sulfur, oxygen as hetero atoms, double and triple bonds, aromatic rings or combination of them.…”

Section: Introductionmentioning

confidence: 99%

Highly efficient polyurethane ionomer corrosion inhibitor: the effect of chain structure

et al. 2011

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A series of polyurethane (PU) ionomers with different degree of sulfonation (DS) have been synthesized and successfully used as corrosion inhibitor for mild steel (MS) in acidic medium. Nuclear magnetic resonance (NMR) and Fourier transform infra red (FTIR) spectra of the sulfonated PUs confirmed the sulfonation on the .NH group of the urethane linkage and DS increases with the increase in the ratio of the sulfonating agent and PU. More than 90% inhibition efficiency (IE) of sulfonated polyurethanes (SPU) has been reported using only 20 ppm of the ionomers. These ionomers inhibited the corrosion of MS through adsorption following the Langmuir adsorption isotherm. Surface coverage has been scaled using scanning electron microscopy (SEM) and atomic force microscopy (AFM). The effect of sulfonation on the electronic and chemical structure of PU molecules has also been investigated. Electronic structure calculations have been performed to predict the adsorption behavior of ionomers on the metal surface, and thereby, the relative inhibition has been quantitatively correlated with DS.

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“…Therefore, a proper investigation into the methods and processes being employed in corrosion inhibition of aluminum would be of remarkable industrial significance. [4][5][6][7][8] Industrial use of acids in numerous mechanical procedures in the oil industry in acid pickling and cleaning of metals invites corrosion. [9] So far, the practice of using natural inhibitors is found to be one of the most suitable and economic techniques for the prevention of corrosion of metals.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Behavior and Computational Analysis of Phenylephrine for Corrosion Inhibition of Aluminum in Acidic Medium

Bashir

Sharma

Singh

et al. 2018

Metall Mater Trans A

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The anticorrosion property of phenylephrine on aluminum in 0.5 M HCl is successfully reported for the first time. The experimental techniques employed included weight loss, polarization, electrochemical impedance spectroscopy (EIS), and computational methods. The results show that the addition/adsorption/application of phenylephrine on the metal surface leads to significant reduction in its corrosion rate (CR). It was found that phenylephrine shows the maximum of 97 pct inhibition at 4000 ppm at 298 K. The results from potentiodynamic polarization revealed that phenylephrine acts as a mixed type of inhibitor. The mode of adsorption of the inhibitor on the aluminum surface followed Langmuir adsorption isotherm. Quantum chemical calculations and molecular dynamic (MD) simulations were adopted to elucidate the inhibition mechanism of the inhibitor on the surface of the metal. Surface analysis was done using scanning electron microscopy (SEM) and atomic force microscopy (AFM) studies.

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Hydrogen absorption by very strong steel during chemical descaling

Cited by 4 publications

References 3 publications

Decontamination of Uranium-Contaminated Steel Surfaces by Hydroxycarboxylic Acid with Uranium Recovery

Decontamination of Uranium-Contaminated Steel Surfaces by Hydroxycarboxylic Acid with Uranium Recovery

Highly efficient polyurethane ionomer corrosion inhibitor: the effect of chain structure

Electrochemical Behavior and Computational Analysis of Phenylephrine for Corrosion Inhibition of Aluminum in Acidic Medium

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