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- Koleva, D.A. (author), Fraaij, A.L.A. (author), Hu, J. (author), Boshkov, N. (author) journal article 2005
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- Koleva, D.A. (author), Hu, J. (author), Van Breugel, K. (author), Boshkov, N. (author), De Wit, H. (author) journal article 2005
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- Koleva, D.A. (author), Van Breugel, K. (author), De Wit, J.H.W. (author), Bachvarov, V. (author) journal article 2006
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- Koleva, D.A. (author), Copuroglu, O. (author), Van Breugel, K. (author), De Wit, J.H.W. (author) journal article 2006
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Koleva, D.A. (author), Hu, J. (author), Van Breugel, K. (author), De Wit, J.H.W. (author), Boshkov, N. (author)An improved cathodic protection (CP), based on pulse regime was investigated in reinforced concrete, compared to conventional CP. Both regimes used CP current in the range of 2 to15 mA/m2. A voltage-to-current converter maintained the pulse current, the latter adjusted with duty cycle of 12% to 50 % and frequency of 500 Hz to 1 kHz. The...journal article 2006
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Koleva, D.A. (author), Van breugel, K. (author), De Wit, J.H.W. (author), Van Westing, E. (author), Boshkov, N. (author), Fraaij, A.L.A. (author)The behavior of steel reinforcement was studied using electrochemical impedance spectroscopy (EIS) and polarization resistance (PR) techniques in conditions of chloride-induced corrosion in ordinary Portland cement-mortar specimens immersed in 7% NaCl for a test period of 120 days and compared to specimens immersed in demineralized water for the...journal article 2007
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Koleva, D.A. (author), De Wit, J.H.W. (author), Van Breugel, K. (author), Lodhi, Z.F. (author), Van Westing, E. (author)The electrochemical behavior of steel reinforcement in conditions of corrosion and cathodic protection was studied, using electrochemical impedance spectroscopy (EIS) and compared to reference (noncorroding) conditions. Polarization resistance (PR) method and potentiodynamic polarization (PDP) were employed as well, in addition to ac 2 pin...journal article 2007
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Koleva, D.A. (author), De Wit, J.H.W. (author), Van Breugel, K. (author), Lodhi, Z.F. (author), Ye, G. (author)The present study explores the formation of corrosion products on the steel surface (using as-received low carbon construction steel) in reinforced concrete in conditions of corrosion and subsequent transformation of these layers in conditions of cathodic protection (CP).journal article 2007
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- Koleva, D.A. (author), Hu, J. (author), Van Beek, K. (author), Van Breugel, K. (author), De Wit, J.H.W. (author) patent 2007
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Koleva, D.A. (author)Corrosion and protection in reinforced concrete. Pulse cathodic protection: an improved cost-effective alternative. The aim of the research project was to study the possibilities for establishing a new or improved electrochemical method for corrosion prevention/protection for reinforced concrete. The main objective was to develop an alternative...doctoral thesis 2007
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Koleva, D.A. (author), Zhang, X. (author), Petrov, P. (author), Boshkov, N. (author)This study presents a comparative investigation of the corrosion behavior of zinc (Zn) and nano-composite zinc (ZnC) galvanic layers on a steel substrate in 5% NaCl solution as a corrosion medium.journal article 2007
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Koleva, D.A. (author), Van Breugel, K. (author), De Wit, J.H.W. (author), Fraaij, A.L.A. (author), Boshkov, N. (author)The present study explores the formation of corrosion products on the steel surface in reinforced concrete in conditions of corrosion and subsequent transformation of these layers in conditions of cathodic protection (CP). Of particular interest was to investigate if the introduced pulse CP (as cost- effective alternative of CP) will lead to...journal article 2007
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Koleva, D.A. (author), Van Breugel, K. (author), De Wit, J.H.W. (author), Fraaij, A.L.A. (author), Boshkov, N. (author)The electrochemical behavior of steel reinforcement in conditions of corrosion and cathodic protection (CP) was studied, using electrochemical impedance spectroscopy (EIS) and compared to reference (non-corroding) conditions. Polarization resistance (PR) method and potentio-dynamic polarization (PDP) were employed as well, in addition to AC 2...journal article 2007
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Koleva, D.A. (author), De Wit, J.H.W. (author), Van Breugel, K. (author), Bachvarov, V. (author), Kolev, H. (author), Fraaij, A. (author)The corrosion behavior of reinforcing steel, previously embedded in concrete and maintained in conditions of corrosion and two regimes (conventional and pulse) of cathodic protection (CP), was characterized using electrochemical measurements in cement extract (CE) solutions of pH 12.6. The investigation aimed at determination of the properties...journal article 2007
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- Koleva, D.A. (author), Van Breugel, K. (author), De Wit, J.H.W. (author) journal article 2008
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- Koleva, D.A. (author), Copuroglu, O. (author), Van Breugel, K. (author), De Wit, J.H.W. (author) journal article 2008
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Koleva, D.A. (author), Zhang, X. (author), Petrov, P. (author), Boshkov, N. (author), Van Breugel, K. (author), De Wit, J.H.W. (author), Mol, J.M.C. (author), Tsvetkova, N. (author)This study reports on a comparative investigation of the corrosion behavior of zinc (Zn) and nano-composite zinc (ZnC) galvanic layers in 5% NaCl solution. The metallic matrix of the ZnC layers incorporates nano-sized, stabilized polymeric aggregates, formed from the amphiphilic tri-block co-polymer: poly(2-hydroxyethyl methacrylate) - poly ...journal article 2008
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- Koleva, D.A. (author), Van Breugel, K. (author), Mol, J.M.C. (author), De Wit, J.H.W. (author) journal article 2009
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- Koleva, D.A. (author), Van Breugel, K. (author), Mol, J.M.C. (author), De Wit, J.H.W. (author) journal article 2009
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- Koleva, D.A. (author), Van Breugel, K. (author), Mol, J.M.C. (author), De Wit, J.H.W. (author) journal article 2009