Comparative Studies of Some Heterocyclic Compounds as Corrosion Inhibitors of Copper in Phosphoric Acid Media

Lashgari, Mohsen; Arshadi, M.; Biglar, M

doi:10.1080/00986441003622887

Cited by 17 publications

(8 citation statements)

References 23 publications

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“…Weight-loss experiments were carried out at room temperature according to the procedure described elsewhere [16]. For electrochemical studies, a conventional threeelectrode set-up was used; Pt foil (2.5 cm 2 ), Ag/AgCl (3 M KCl) with Lugging salt-bridge-capillary and copper plate (1 cm 2 ; 10u10u3 mm) mounted in epoxy resin as auxiliary, reference and working electrodes, respectively.…”

Section: Methodsmentioning

confidence: 99%

Experimental and theoretical studies of media effects on copper corrosion in acidic environments containing 2-amino-5-mercapto-1,3,4-thiadiazole

Lashgari

Arshadi

Biglar

2010

JICS

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Corrosion behaviour of copper metal in acid solutions (HCl, H 2 SO 4 and H 3 PO 4 ) containing 2-amino-5-mercapto-1,3,4-thiadiazole (AMT) was investigated experimentally and theoretically via gravimetric, potentio-dynamic and quantum electrochemical approaches. Similar behavior was observed for H 2 SO 4 and H 3 PO 4 media, and related to the nature of anions at metal/solution interface. With regard to HCl, however, the rate of corrosion was determined to be low at initial stages, but high later on using an auto-catalyzing mechanism. In the presence of AMT, the experimental studies revealed that this molecule was a good anodic-type inhibitor causing substantial changes in corrosion potential. Moreover, its adsorption obeys the Langmuir isotherm. The values of ǻG ads were determined and correlated to the inhibitor powers. Finally, the influence of media (anions) on metal corrosion was also investigated from molecular point of view by calculations of the copper-anions interaction using density functional theory.

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Section: Methodsmentioning

confidence: 99%

Experimental and theoretical studies of media effects on copper corrosion in acidic environments containing 2-amino-5-mercapto-1,3,4-thiadiazole

Lashgari

Arshadi

Biglar

2010

JICS

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“…Despite its high resistance towards uniform type of corrosion, pitting of copper and its alloys is still of concern in environments containing ammonia, steam containing CO 2 , NH 3 , sulfides and chlorides (6)(7)(8). Some of the methods used to improve the copper alloys corrosion resistance include the use of coatings (9), alloying elements (10) and corrosion inhibitors (11)(12)(13)(14)(15)(16)(17)(18)(19)(20)(21)(22)(23)(24)(25)(26). Among these, fatty acids have been used as very effective corrosion inhibitors (27)(28)(29)(30)(31)(32).…”

Section: Introductionmentioning

confidence: 99%

Use of an amide-type corrosion inhibitor synthesized from the coffee bagasse oil on the corrosion of Cu in NaCl

Velazquez-Torres

Martı́nez

Porcayo-Calderón

et al. 2017

Green Chemistry Letters and Reviews

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An amide, namely N-[2-[(2-hydroxyethyl) amino] ethyl]-amide, extracted from the fatty acids contained in the coffee bagasse, has been investigated as a possible green corrosion inhibitor for copper in 3.5% NaCl by using potentiodynamic polarization curves and electrochemical impedance spectroscopy measurements. Results were complemented by detailed scanning electronic microscopy, FTIR and gas chromatography studies. Results have shown that N-[2-[(2hydroxyethyl) amino] ethyl]-amide is a good, mixed type of corrosion inhibitor, with an efficiency that increases with its concentration but it decreases with a rise in the temperature. It adsorbs chemically onto the copper surface by following a Langmuir type of adsorption isotherm.

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“…The rate of electrode degradation under anodic regime was determined through mass-loss experiments, using this formula as follows [16]:…”

Section: Resultsmentioning

confidence: 99%

Lead‐Silver Anode Degradation during Zinc Electrorecovery Process: Chloride Effect and Localized Damage

Lashgari

Hosseini

2013

Journal of Chemistry

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Using mass-loss, potentiodynamic polarization, and electrochemical impedance measurements under anodic regime, the corrosion behaviour of lead-silver (0.55%) electrode in zinc electrowinning solution containing different concentration of chloride anions was studied. The results revealed that the rate of corrosion does not monotonically increase with concentration. Moreover, the maximum degradation occurs at the concentration where the anodic process (oxygen evolution) proceeds hardly. According to polarization curves, the electrode exhibited obvious electrocatalytic activity (for anode reaction) by forming oxide layer. To scrutinize the localized damage, occurring at the bottom of anode, we also took some scanning electron micrographs with energy dispersive X-ray analyses. The investigations suggested a new mechanism, that is, a complicated migration phenomenon, resulting from an electrodissolution/sedimentation/deposition process.

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Comparative Studies of Some Heterocyclic Compounds as Corrosion Inhibitors of Copper in Phosphoric Acid Media

Cited by 17 publications

References 23 publications

Experimental and theoretical studies of media effects on copper corrosion in acidic environments containing 2-amino-5-mercapto-1,3,4-thiadiazole

Experimental and theoretical studies of media effects on copper corrosion in acidic environments containing 2-amino-5-mercapto-1,3,4-thiadiazole

Use of an amide-type corrosion inhibitor synthesized from the coffee bagasse oil on the corrosion of Cu in NaCl

Lead‐Silver Anode Degradation during Zinc Electrorecovery Process: Chloride Effect and Localized Damage

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