The Experts below are selected from a list of 2358 Experts worldwide ranked by ideXlab platform

Carlos Martín - One of the best experts on this subject based on the ideXlab platform.

Loto R. T. - One of the best experts on this subject based on the ideXlab platform.

  • INHIBITION EFFECT OF PHENYLAMINE ON THE CORROSION OF AUSTENITIC STAINLESS STEEL TYPE 304 IN Dilute Sulphuric Acid
    2015
    Co-Authors: Loto R. T., Loto C. A., Popoola A. P.
    Abstract:

    The corrosion of austenitic stainless steel (type 304) in Dilute Sulphuric Acid solutions in addition to recrystalized sodium chloride concentrates in the presence of specific proportions of phenylamine was studied with the aid of polarization resistance technique, electrode potential monitoring and coupon method. Results showed the overwhelming influence of the compound in corrosion inhibition with an inhibition efficiency of 97.5% from coupon analysis and 86.10% from polarization test at highest observed concentration of the inhibitor. Corrosion potential measurement showed potentials well with passivation values. Corrosion rate decreased progressively with increase in concentration of phenylamine. The adsorption of the compound on the steel surface followed the Langmuir isotherm model. Thermodynamic variables of adsorption surmised showed the interaction mode with the steel to be physiochemical and spontaneous. Observation from scanning electron microscopy and x-ray diffractometry showed the electrochemical impact on the surface topography and the phase compounds of the steel samples studied. Results from statistical analysis depict the sharp influence of inhibitor concentration on the electrochemical performance of the compound

  • Pitting Corrosion Inhibition of Type 304 Austenitic Stainless steel by 2�Amino�5�ethyl�1,3,4�thiadiazole in Dilute Sulphuric Acid
    'Pleiades Publishing Ltd', 2015
    Co-Authors: Loto R. T., Loto C. A.
    Abstract:

    The electrochemical behaviour and inhibitor protection of 2�amino�5�ethyl�1,3,4�thiadiazole (TTD) on the pitting corrosion of austenitic stainless steel (type 304) in Dilute Sulphuric Acid solution con� taminated with recrystallised sodium chloride was evaluated with the aid of potentiodynamic polarization method. TTD greatly reduced the corrosion rate of the steel with a corrosion inhibition efficiency ranging from 88.99–87.36%. The corrosion potential, pitting potential, repassivation potential, nucleation resis� tance, passivation range and repassivation capacity measurements and potentiodynamic studies were applied to assess the steel’s pitting resistance characteristics and behaviour in the Acid chloride media. Results showed that pitting potential values increased with addition of TTD compound in conjunction with increase in the passivation range which strongly indicating increased electrochemical resistance to pitting corrosio

  • Inhibition effect of Phenylamine on the Corrosion of Austenitic Stainless Steel (Type 304) in Dilute Sulphuric Acid
    2014
    Co-Authors: Loto R. T., Loto C. A., Popoola A. P.
    Abstract:

    The corrosion of austenitic stainless steel (type 304) in Dilute Sulphuric Acid solutions in addition to recrystalized sodium chloride concentrates in the presence of specific proportions of phenylamine was studied with the aid of polarization resistance technique, electrode potential monitoring and coupon method. Results showed the overwhelming influence of the compound in corrosion inhibition with an inhibition efficiency of 97.5% from coupon analysis and 86.10% from polarization test at highest observed concentration of the inhibitor. Corrosion potential measurement showed potentials well with passivation values. Corrosion rate decreased progressively with increase in concentration of phenylamine. Adsorption of the compound on the steel surface followed the Langmuir isotherm model. Thermodynamic calculations showed the interaction mode with the steel to be physiochemical. Observation from scanning electron microscopy and x-ray diffractometry showed the electrochemical impact on the surface topography and the phase compounds of the steel samples studied. Results from statistical analysis depict the sharp influence of inhibitor concentration on the electrochemical performance of the compound

Popoola A. P. - One of the best experts on this subject based on the ideXlab platform.

  • INHIBITION EFFECT OF PHENYLAMINE ON THE CORROSION OF AUSTENITIC STAINLESS STEEL TYPE 304 IN Dilute Sulphuric Acid
    2015
    Co-Authors: Loto R. T., Loto C. A., Popoola A. P.
    Abstract:

    The corrosion of austenitic stainless steel (type 304) in Dilute Sulphuric Acid solutions in addition to recrystalized sodium chloride concentrates in the presence of specific proportions of phenylamine was studied with the aid of polarization resistance technique, electrode potential monitoring and coupon method. Results showed the overwhelming influence of the compound in corrosion inhibition with an inhibition efficiency of 97.5% from coupon analysis and 86.10% from polarization test at highest observed concentration of the inhibitor. Corrosion potential measurement showed potentials well with passivation values. Corrosion rate decreased progressively with increase in concentration of phenylamine. The adsorption of the compound on the steel surface followed the Langmuir isotherm model. Thermodynamic variables of adsorption surmised showed the interaction mode with the steel to be physiochemical and spontaneous. Observation from scanning electron microscopy and x-ray diffractometry showed the electrochemical impact on the surface topography and the phase compounds of the steel samples studied. Results from statistical analysis depict the sharp influence of inhibitor concentration on the electrochemical performance of the compound

  • Inhibition effect of Phenylamine on the Corrosion of Austenitic Stainless Steel (Type 304) in Dilute Sulphuric Acid
    2014
    Co-Authors: Loto R. T., Loto C. A., Popoola A. P.
    Abstract:

    The corrosion of austenitic stainless steel (type 304) in Dilute Sulphuric Acid solutions in addition to recrystalized sodium chloride concentrates in the presence of specific proportions of phenylamine was studied with the aid of polarization resistance technique, electrode potential monitoring and coupon method. Results showed the overwhelming influence of the compound in corrosion inhibition with an inhibition efficiency of 97.5% from coupon analysis and 86.10% from polarization test at highest observed concentration of the inhibitor. Corrosion potential measurement showed potentials well with passivation values. Corrosion rate decreased progressively with increase in concentration of phenylamine. Adsorption of the compound on the steel surface followed the Langmuir isotherm model. Thermodynamic calculations showed the interaction mode with the steel to be physiochemical. Observation from scanning electron microscopy and x-ray diffractometry showed the electrochemical impact on the surface topography and the phase compounds of the steel samples studied. Results from statistical analysis depict the sharp influence of inhibitor concentration on the electrochemical performance of the compound

Loto C. A. - One of the best experts on this subject based on the ideXlab platform.

  • INHIBITION EFFECT OF PHENYLAMINE ON THE CORROSION OF AUSTENITIC STAINLESS STEEL TYPE 304 IN Dilute Sulphuric Acid
    2015
    Co-Authors: Loto R. T., Loto C. A., Popoola A. P.
    Abstract:

    The corrosion of austenitic stainless steel (type 304) in Dilute Sulphuric Acid solutions in addition to recrystalized sodium chloride concentrates in the presence of specific proportions of phenylamine was studied with the aid of polarization resistance technique, electrode potential monitoring and coupon method. Results showed the overwhelming influence of the compound in corrosion inhibition with an inhibition efficiency of 97.5% from coupon analysis and 86.10% from polarization test at highest observed concentration of the inhibitor. Corrosion potential measurement showed potentials well with passivation values. Corrosion rate decreased progressively with increase in concentration of phenylamine. The adsorption of the compound on the steel surface followed the Langmuir isotherm model. Thermodynamic variables of adsorption surmised showed the interaction mode with the steel to be physiochemical and spontaneous. Observation from scanning electron microscopy and x-ray diffractometry showed the electrochemical impact on the surface topography and the phase compounds of the steel samples studied. Results from statistical analysis depict the sharp influence of inhibitor concentration on the electrochemical performance of the compound

  • Pitting Corrosion Inhibition of Type 304 Austenitic Stainless steel by 2�Amino�5�ethyl�1,3,4�thiadiazole in Dilute Sulphuric Acid
    'Pleiades Publishing Ltd', 2015
    Co-Authors: Loto R. T., Loto C. A.
    Abstract:

    The electrochemical behaviour and inhibitor protection of 2�amino�5�ethyl�1,3,4�thiadiazole (TTD) on the pitting corrosion of austenitic stainless steel (type 304) in Dilute Sulphuric Acid solution con� taminated with recrystallised sodium chloride was evaluated with the aid of potentiodynamic polarization method. TTD greatly reduced the corrosion rate of the steel with a corrosion inhibition efficiency ranging from 88.99–87.36%. The corrosion potential, pitting potential, repassivation potential, nucleation resis� tance, passivation range and repassivation capacity measurements and potentiodynamic studies were applied to assess the steel’s pitting resistance characteristics and behaviour in the Acid chloride media. Results showed that pitting potential values increased with addition of TTD compound in conjunction with increase in the passivation range which strongly indicating increased electrochemical resistance to pitting corrosio

  • Inhibition effect of Phenylamine on the Corrosion of Austenitic Stainless Steel (Type 304) in Dilute Sulphuric Acid
    2014
    Co-Authors: Loto R. T., Loto C. A., Popoola A. P.
    Abstract:

    The corrosion of austenitic stainless steel (type 304) in Dilute Sulphuric Acid solutions in addition to recrystalized sodium chloride concentrates in the presence of specific proportions of phenylamine was studied with the aid of polarization resistance technique, electrode potential monitoring and coupon method. Results showed the overwhelming influence of the compound in corrosion inhibition with an inhibition efficiency of 97.5% from coupon analysis and 86.10% from polarization test at highest observed concentration of the inhibitor. Corrosion potential measurement showed potentials well with passivation values. Corrosion rate decreased progressively with increase in concentration of phenylamine. Adsorption of the compound on the steel surface followed the Langmuir isotherm model. Thermodynamic calculations showed the interaction mode with the steel to be physiochemical. Observation from scanning electron microscopy and x-ray diffractometry showed the electrochemical impact on the surface topography and the phase compounds of the steel samples studied. Results from statistical analysis depict the sharp influence of inhibitor concentration on the electrochemical performance of the compound

Juan Carlos Parajó - One of the best experts on this subject based on the ideXlab platform.

  • Dilute Sulphuric Acid pretreatment and enzymatic hydrolysis of Moringa oleifera empty pods
    Industrial Crops and Products, 2013
    Co-Authors: Ena Hernández, Ariel Garcia, Michael Lopez, Juergen Puls, Juan Carlos Parajó, Carlos Martín
    Abstract:

    In this work, Dilute Sulphuric Acid prehydrolysis of residual empty pods of Moringa oleifera fruits was investigated as pretreatment for enzymatic hydrolysis of cellulose. In experiments performed ...

  • Prehydrolysis ofEucalyptus wood with Dilute Sulphuric Acid: operation in autoclave
    Holz als Roh- und Werkstoff, 1994
    Co-Authors: Juan Carlos Parajó, D. Vázquez, José Luis Alonso, Valentín Santos, Herminia Domínguez
    Abstract:

    The production of xylose fromEucalyptus globulus wood samples in media containing Sulphuric Acid was studied. The prehydrolysis reactions were carried out in autoclave. All the experiments were performed with liquid/wood ratio of 10 g/g. The effects of Sulphuric Acid concentration (within the range 2–6%), reaction time (0–6 h) and temperature (115 or 130°C) on the type and distribution of reaction products were studied. Xylose was the main compound generated by hydrolysis. The xylose concentration/time series of data were fitted to a kinetic model which provided a close reproduction of experimental results. The concentrations of other reaction products (glucose, arabinose, furfural and acetic Acid) in reaction media were also determined. The results obtained are compared with those obtained in experiments carried out at atmospheric pressure.

  • Prehydrolysis of Eucalyptus wood with Dilute Sulphuric Acid: operation at atmospheric pressure
    Holz als Roh- und Werkstoff, 1993
    Co-Authors: Juan Carlos Parajó, D. Vázquez, José Luis Alonso, Valentín Santos, Herminia Domínguez
    Abstract:

    MilledEucalyptus globulus wood samples were subjected to Acid hydrolysis using H2SO4 as catalyst. The reactions were carried out in a stirred, reflux-operated batch reactor. The effects of both catalyst concentration (in the range 3.5–10%) and hydrolysis time (0–11 h) on the concentration of arabinose, glucose, xylose, acetic Acid and furfural were studied. The kinetics of xylan hydrolysis followed general trends similar to those described in earlier studies. Almost quantitative xylose recovery was achieved after 11 h of reaction time in experiments with 10% H2SO4. The furfural concentrations were low (0–0.44 g/L) in all the cases studied. Additional aspects relative to the selectivity of the prehydrolysis are discussed.