Yazar "Erbil, Mehmet" seçeneğine göre listele

Listeleniyor 1 - 3 / 3
  • Küçük Resim Yok
    Öğe
    Influence of polyvinylpyrrolidone on rebar corrosion in sulphate solution
    (TECHNO-PRESS, 2009) Gurten, A. Ali; Bayol, Emel; Kayakirilmaz, Kadriye; Erbil, Mehmet
    This paper reports the results of an experimental investigation of the polyvinylpyrrolidone (PVP) influence on the steel reinforcement corrosion and compressive strength of concretes in sulphate medium. The effect of admixture of PVP in concrete on the corrosion resistance of steel reinforced concrete was assessed by measuring electrochemical test during 60 days immersion in two different external solutions. AC impedance spectrum indicated that the resistance of PVP mixed electrodes were higher than those without PVP. The compressive strength of concrete specimens containing PVP was measured and an increase of 190%similar to 24% was observed.
  • Küçük Resim Yok
    Öğe
    Interactions of some Schiff base compounds with mild steel surface in hydrochloric acid solution
    (ELSEVIER SCIENCE SA, 2008) Bayol, Emel; Gurten, Tijen; Gurten, A. Ali; Erbil, Mehmet
    The inhibition effect of the Schiff bases N,N'-bis(salicylidene)-1,2-etliylenedianiine (Salen), N,N'-bis(5-methoxysalicylidene)-1,2-ethylenediamine (MeO-Salen) and N,N'-bis(5-nitrosalicylidene)-1,2ethylenediamine (NO(2)-Salen) on the corrosion of the mild steel in 1.0M HCl has been studied by electrochemical impedance spectroscopy (EIS), linear polarisation resistance (LPR) and Tafel polarisation measurements. Maximum inhibition for MeO-Salen was obtained. Results showed that the inhibition efficiency have increased when the concentration of the Schiff bases have increased. Polarisation curves revealed that the Schiff bases acted as anodic inhibitors. The surface adsorption of the Schiff bases has lead to a decrease in the double layer capacitance and to an increase in polarisation resistance. The inhibitor performance depended strongly on the type of functional groups on benzene ring. The adsorption process is spontaneous one and follows Langmuir adsorption isotherm model. Scanning electron microscopy (SEM) has been applied to identify the surface morphology of the mild steel both in the absence and presence of the Schiff base molecules. (C) 2008 Elsevier B.V. All rights reserved.
  • Küçük Resim Yok
    Öğe
    The effect of thiosemicarbazide on corrosion resistance of steel reinforcement in concrete
    (ELSEVIER SCI LTD, 2007) Gurten, A. Ali; Kayakirilmaz, Kadriye; Erbil, Mehmet
    This study describes a laboratory investigation of the influence of thiosemicarbazide (TSC) on the corrosion of reinforcing steel and the compressive strength of concrete. The effect of TSC on the corrosion resistance of steel reinforced concrete was evaluated by carrying out electrochemical tests in NaCl and NaCl + TSC solutions for 60 days. Polarisation resistance (R(P)) values of TSC added reinforced concrete were much higher than those without TSC. Similarly, AC impedance spectra revealed that the resistance of TSC mixed electrodes were also quite higher than those without. The compressive strength of concrete specimens containing TSC was measured and an increase of 20-25% was observed. (c) 2005 Elsevier Ltd. All rights reserved.