Influence of flow on the corrosion inhibition of St52-3 type steel by potassium hydrogen-phosphate

Ashassi-Sorkhabi, Habib; Asghari, Elnaz

doi:10.1016/j.corsci.2009.05.010

Cited by 26 publications

(19 citation statements)

References 38 publications

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“…The increasing of vacancy density declines the compactness of passive film and thus leads to oxidative dissolution of Cr (III) into Cr (VI) at oxide film/PCM interface. Meanwhile, at high applied potentials, negatively charged phosphate and sulphate ions are prone to migrate to the positively charged oxide film/PCM interface via electrostatic interaction and then make conjunctions with oxide film [4,[53][54][55][56]. With the strong ability in capturing oxygen atom, Cr ions reform Cr 2 O 3 which can heal the vacancy of oxide film [51].…”

Section: Potentiodynamic Polarisation Measurementsmentioning

confidence: 99%

Corrosion behaviours of typical metals in molten hydrate salt of Na₂HPO₄·12H₂O – Na₂SO₄·10H₂O for thermal energy storage

Zhao

Zheng

Munis

et al. 2019

Corrosion Engineering, Science and Technology

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The corrosion behaviours of stainless steel 316 (SS-316), copper (Cu) and aluminium 1060 (Al-1060) in composite molten hydrate salt phase change materials (PCM) composed of Na 2 HPO 4 •12H 2 O -Na 2 SO 4 •10H 2 O have been studied by electrochemical measurements in conjunction with SEM and XRD. The corrosion resistance of the metals in the composite molten PCM follows SS-316 > Cu > Al-1060. The role of the composite molten PCM affecting the corrosion resistance and its mechanisms of the metals are as following: the experiments reveal that SS-316 readily gets passivated in the composite molten PCM medium with no considerable corrosion; Cu suffers an initial rapid anodic dissolution which is further impeded by the formation of spot-like salt precipitates on the substrate, mainly consisting of CuHPO 4 •nH 2 O, CuSO 4 •nH 2 O and Cu 2 O; Al-1060 shows a continuous large dissolution in the studied PCM with a porous corroded surface morphology due to the complete destruction of passive film under the attack of OHions.

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Section: Potentiodynamic Polarisation Measurementsmentioning

confidence: 99%

Corrosion behaviours of typical metals in molten hydrate salt of Na₂HPO₄·12H₂O – Na₂SO₄·10H₂O for thermal energy storage

Zhao

Zheng

Munis

et al. 2019

Corrosion Engineering, Science and Technology

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“…This spacer contains one phosphorous and three oxygen atoms. It has been reported that phosphorus containing compounds are commonly used to inhibit metal corrosion in aqueous environments [36]. Their use is considered to be risk free due to their low toxicity [37].…”

Section: Inhibition Of Environmental Sulfidogenic Bacterial Activity mentioning

confidence: 99%

Cationic Gemini Surfactant as a Corrosion Inhibitor and a Biocide for High Salinity Sulfidogenic Bacteria Originating from an Oil‐Field Water Tank

Labena

Hegazy

Horn

et al. 2013

J Surfact & Detergents

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A novel cationic gemini surfactant (NCGS) was synthesized and characterized. The inhibitory effect of NCGS was evaluated on the basis of protecting a metal surface from the salinity (5.49 % NaCl) and the activity of environmental sulfidogenic bacteria which originated from an oil‐field water tank. Sulfidogenic bacterial activities were determined based on sulfide production, redox potential, changes in biofilm structures and constituents and metal corrosion rate calculations. At high surfactant concentrations, the sulfide production was completely inhibited as well as a considerable drop in the redox potential was observed in the reactor's bulk phase. A minimum inhibitory concentration of the NCGS was achieved at a concentration of 1 mM. The NCGS showed a high ability to inhibit a biofilm over the metal surface at a concentration of 0.1 mM. The lowest metal corrosion rate was detected at a concentration of 5 mM with a metal corrosion inhibition efficiency of 97 %. In addition the NCGS showed a nonspecific biocidal activity against Gram‐positive and Gram‐negative bacterial strains.

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“…The four‐electron process can occur through a direct pathway (Equation ) or an indirect pathway involving the formation of H 2 O 2 through Equation and then conversion of the produced H 2 O 2 molecules to OH − through a two‐electron process …”

Section: Resultsmentioning

confidence: 99%

Mechanical polishing, surface roughness, near‐surface deformation, and electrochemical corrosion of Alloy 690TT

Arjmand

Zhang

2015

Surface & Interface Analysis

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The effects of mechanical grinding/polishing, surface roughness, and near-surface deformation on the electrochemical corrosion behavior of thermally treated (TT) Alloy 690 were studied in a sodium chloride solution. The X-ray photoelectron spectroscopy and transmission electron microscopy analyses revealed that mechanical grinding/polishing can change the ratio of the elements at the surface of the as-received Alloy 690TT specimen by removing its Cr-rich outer layer and causing deformation at the nearsurface microstructure, something which has a direct impact on the rate of the oxygen reduction reaction (ORR), the pitting potential (E pit ), and the corrosion potential (E corr ) of Alloy 690TT. It was observed that the ratio of Cr in the surface is a significant factor that controls the rate of the ORR and the corrosion parameters such as E corr . Higher amounts of Cr at the surface accelerate the ORR. The near-surface deformation shifts the E pit values towards less positive potentials. It was also found that due to the different near-surface chemical composition of the as-received Alloy 690TT specimen compared with the ground and the polished specimens, the surface roughness parameters do not have a regular correlation with the rate of the ORR and the values of the E corr and the E pit . Only the passive current density increases when the surface roughness is increased.

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Influence of flow on the corrosion inhibition of St52-3 type steel by potassium hydrogen-phosphate

Cited by 26 publications

References 38 publications

Corrosion behaviours of typical metals in molten hydrate salt of Na₂HPO₄·12H₂O – Na₂SO₄·10H₂O for thermal energy storage

Corrosion behaviours of typical metals in molten hydrate salt of Na₂HPO₄·12H₂O – Na₂SO₄·10H₂O for thermal energy storage

Cationic Gemini Surfactant as a Corrosion Inhibitor and a Biocide for High Salinity Sulfidogenic Bacteria Originating from an Oil‐Field Water Tank

Mechanical polishing, surface roughness, near‐surface deformation, and electrochemical corrosion of Alloy 690TT

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Influence of flow on the corrosion inhibition of St52-3 type steel by potassium hydrogen-phosphate

Cited by 26 publications

References 38 publications

Corrosion behaviours of typical metals in molten hydrate salt of Na2HPO4·12H2O – Na2SO4·10H2O for thermal energy storage

Corrosion behaviours of typical metals in molten hydrate salt of Na2HPO4·12H2O – Na2SO4·10H2O for thermal energy storage

Cationic Gemini Surfactant as a Corrosion Inhibitor and a Biocide for High Salinity Sulfidogenic Bacteria Originating from an Oil‐Field Water Tank

Mechanical polishing, surface roughness, near‐surface deformation, and electrochemical corrosion of Alloy 690TT

Contact Info

Product

Resources

About

Corrosion behaviours of typical metals in molten hydrate salt of Na₂HPO₄·12H₂O – Na₂SO₄·10H₂O for thermal energy storage

Corrosion behaviours of typical metals in molten hydrate salt of Na₂HPO₄·12H₂O – Na₂SO₄·10H₂O for thermal energy storage