TY  - JOUR
AU  - Jegdić, Bore
AU  - Bobić, Biljana
AU  - Stevanović, Maja
AU  - Mihailović, Marija
AU  - Daničić, Dunja
AU  - Kovačina, Jovanka
AU  - Radojković, Bojana
PY  - 2020
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4533
AB  - The paper analyses the corrosion behaviour of both naturally and artificially aged AA2024 aluminium alloy in NaCl solution in the presence of the corrosion inhibitor benzotriazole (BTA). The differences between these two aging tempers in terms of resistance to general corrosion are explained as well as the differences in terms of pit formation and pit growth. Based on the values of the polarisation resistance and the corrosion current density, the general corrosion resistance of the alloy is determined in the absence and in the presence of BTA. The resistance to pit formation and pit growth is determined on the basis of the polarisation measurements results. Scanning electron microscopy confirmed the expected differences in the appearance and size of the pits formed in naturally aged and artificially aged alloy. In the presence of the corrosion inhibitor BTA, for both aging tempers of the alloy, the corrosion resistance is significantly higher compared to the resistance in the solution without the inhibitor. The value of the polarisation resistance for both aging tempers increases over time. However, at the same time, the value of the constant phase element increases as well. An explanation for this phenomenon is provided. The calculated average value of the thickness of the adsorbed inhibitor layer on the surface of the aluminium alloy is in accordance with the inhibitor protective ability for both aging tempers. Graphic
PB  - Korean Inst Metals Materials, Seoul
T2  - Metals and Materials International
T1  - Resistance to Pit Formation and Pit Growth for Different Tempers of AA2024 Aluminium Alloy in Presence of Benzotriazole
EP  - 1653
IS  - 11
SP  - 1643
VL  - 26
DO  - 10.1007/s12540-019-00451-8
ER  - 

@article{
author = "Jegdić, Bore and Bobić, Biljana and Stevanović, Maja and Mihailović, Marija and Daničić, Dunja and Kovačina, Jovanka and Radojković, Bojana",
year = "2020",
abstract = "The paper analyses the corrosion behaviour of both naturally and artificially aged AA2024 aluminium alloy in NaCl solution in the presence of the corrosion inhibitor benzotriazole (BTA). The differences between these two aging tempers in terms of resistance to general corrosion are explained as well as the differences in terms of pit formation and pit growth. Based on the values of the polarisation resistance and the corrosion current density, the general corrosion resistance of the alloy is determined in the absence and in the presence of BTA. The resistance to pit formation and pit growth is determined on the basis of the polarisation measurements results. Scanning electron microscopy confirmed the expected differences in the appearance and size of the pits formed in naturally aged and artificially aged alloy. In the presence of the corrosion inhibitor BTA, for both aging tempers of the alloy, the corrosion resistance is significantly higher compared to the resistance in the solution without the inhibitor. The value of the polarisation resistance for both aging tempers increases over time. However, at the same time, the value of the constant phase element increases as well. An explanation for this phenomenon is provided. The calculated average value of the thickness of the adsorbed inhibitor layer on the surface of the aluminium alloy is in accordance with the inhibitor protective ability for both aging tempers. Graphic",
publisher = "Korean Inst Metals Materials, Seoul",
journal = "Metals and Materials International",
title = "Resistance to Pit Formation and Pit Growth for Different Tempers of AA2024 Aluminium Alloy in Presence of Benzotriazole",
pages = "1653-1643",
number = "11",
volume = "26",
doi = "10.1007/s12540-019-00451-8"
}

Jegdić, B., Bobić, B., Stevanović, M., Mihailović, M., Daničić, D., Kovačina, J.,& Radojković, B.. (2020). Resistance to Pit Formation and Pit Growth for Different Tempers of AA2024 Aluminium Alloy in Presence of Benzotriazole. in Metals and Materials International
Korean Inst Metals Materials, Seoul., 26(11), 1643-1653.
https://doi.org/10.1007/s12540-019-00451-8

Jegdić B, Bobić B, Stevanović M, Mihailović M, Daničić D, Kovačina J, Radojković B. Resistance to Pit Formation and Pit Growth for Different Tempers of AA2024 Aluminium Alloy in Presence of Benzotriazole. in Metals and Materials International. 2020;26(11):1643-1653.
doi:10.1007/s12540-019-00451-8 .

Jegdić, Bore, Bobić, Biljana, Stevanović, Maja, Mihailović, Marija, Daničić, Dunja, Kovačina, Jovanka, Radojković, Bojana, "Resistance to Pit Formation and Pit Growth for Different Tempers of AA2024 Aluminium Alloy in Presence of Benzotriazole" in Metals and Materials International, 26, no. 11 (2020):1643-1653,
https://doi.org/10.1007/s12540-019-00451-8 . .

TY  - JOUR
AU  - Milošević, Milena D.
AU  - Daničić, Dunja
AU  - Kovačina, Jovanka N.
AU  - Bugarčić, Mladen
AU  - Rusmirović, Jelena
AU  - Kovačević, Tihomir
AU  - Marinković, Aleksandar
PY  - 2019
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/4271
AB  - The study of the synthesis of anticorrosive inhibitors, based on chemically modified tannins, and their use in alkyd based coatings to improve anticorrosive properties is presented in this work. Two methods of tannin modification were applied: direct method using ammonium hydroxide, ammonium hydroxide/ammonium chloride buffer or diethylenetriamine (DETA); and a two-step method including tannin modification with epichlorohydrin (ECH) in first step to produce epoxy modified tannin, ET, and further modification with heteroaromatic amines or linseed oil fatty acids (LFA) in second step. The obtained anticorrosive additives were characterized using ATR-FTIR, 1H and 13C NMR spectroscopies and elemental analysis. Epoxy, amino, hydroxyl, acid and iodine values of the synthesized inhibitors were determined according to standard methods. The prepared alkyd coating with tannin inhibitors was tested according to standard SRPS EN ISO 4628 method. Anticorrosive coating containing modified tannin based additive showed increased anticorrosive properties, good adhesion and coverage comparing to the coating with zinc phosphate additive. The alkyd coating films based on ET-LFA and ET modified with 2-amino-5-mercapto-1,3,4-thiadiazole showed best anticorrosive results.
AB  - U ovom radu prikazana je sinteza antikorozionih aditiva na bazi hemijski modifikovanog tanina i njihova primena u alkidnim premazima u cilju poboljšanja antikorozionih svojstava. Prikazane su dve metode modifikacije tanina: direktna modifikacija tanina primenom amonijum-hidroksida, amonijum-hidroksid/amonijum-hlorid pufera ili dietilentriamina (DETA); i dvostepena modifikacija tanina koja u prvom stupnju uključuje modifikaciju epihlorhidrinom sa ciljem da se dobije tannin sa epoksi terminiranim funkcionalnim grupama, ET, i modifikaciju ET tanina sa heteroaromatičnim aminima ili masnim kiselinama izolovanim iz lanenog ulja (LFA) u drugom stupnju. Sintetisani antikorozioni aditivi su okarakterisani primenom ATR-FTIR, 1H i 13C NMR spektroskopija, i elementalnom analizom. Sadržaj epoksi, amino, hidroksilnih i karboksilnih grupa i vrednost jodnog broja sintetisanih aditiva određen je prema standardnim metodama. Alkidni premazi koji sadrže antikorozione aditive na bazi modifikovanog tanina ispitani su prema standardnoj SRPS EN ISO 4628 metodi. Antikorozivni alkidni premazi na bazi modfikovanih tanina pokazali su poboljšane antikorozione karakteristike i adheziju u poređenju sa alkidnim premazom na bazi cink-fosfata. Alkidni premazi koji sadrže dvostepeno modifikovani tanin sa LFA i 2-amino-5-merkapto-1,3,4-tiadiazolom pokazali su najbolje antikorozione karakteristike.
PB  - Engineering Society for Corrosion, Belgrade, Serbia
T2  - Zaštita materijala
T1  - Modified tannins for alkyd based anticorrosive coatings
T1  - Primena modifikovanih tanina u antikorozionim alkidnim premazima
EP  - 95
IS  - 1
SP  - 81
VL  - 60
DO  - 10.5937/zasmat1901081M
ER  - 

@article{
author = "Milošević, Milena D. and Daničić, Dunja and Kovačina, Jovanka N. and Bugarčić, Mladen and Rusmirović, Jelena and Kovačević, Tihomir and Marinković, Aleksandar",
year = "2019",
abstract = "The study of the synthesis of anticorrosive inhibitors, based on chemically modified tannins, and their use in alkyd based coatings to improve anticorrosive properties is presented in this work. Two methods of tannin modification were applied: direct method using ammonium hydroxide, ammonium hydroxide/ammonium chloride buffer or diethylenetriamine (DETA); and a two-step method including tannin modification with epichlorohydrin (ECH) in first step to produce epoxy modified tannin, ET, and further modification with heteroaromatic amines or linseed oil fatty acids (LFA) in second step. The obtained anticorrosive additives were characterized using ATR-FTIR, 1H and 13C NMR spectroscopies and elemental analysis. Epoxy, amino, hydroxyl, acid and iodine values of the synthesized inhibitors were determined according to standard methods. The prepared alkyd coating with tannin inhibitors was tested according to standard SRPS EN ISO 4628 method. Anticorrosive coating containing modified tannin based additive showed increased anticorrosive properties, good adhesion and coverage comparing to the coating with zinc phosphate additive. The alkyd coating films based on ET-LFA and ET modified with 2-amino-5-mercapto-1,3,4-thiadiazole showed best anticorrosive results., U ovom radu prikazana je sinteza antikorozionih aditiva na bazi hemijski modifikovanog tanina i njihova primena u alkidnim premazima u cilju poboljšanja antikorozionih svojstava. Prikazane su dve metode modifikacije tanina: direktna modifikacija tanina primenom amonijum-hidroksida, amonijum-hidroksid/amonijum-hlorid pufera ili dietilentriamina (DETA); i dvostepena modifikacija tanina koja u prvom stupnju uključuje modifikaciju epihlorhidrinom sa ciljem da se dobije tannin sa epoksi terminiranim funkcionalnim grupama, ET, i modifikaciju ET tanina sa heteroaromatičnim aminima ili masnim kiselinama izolovanim iz lanenog ulja (LFA) u drugom stupnju. Sintetisani antikorozioni aditivi su okarakterisani primenom ATR-FTIR, 1H i 13C NMR spektroskopija, i elementalnom analizom. Sadržaj epoksi, amino, hidroksilnih i karboksilnih grupa i vrednost jodnog broja sintetisanih aditiva određen je prema standardnim metodama. Alkidni premazi koji sadrže antikorozione aditive na bazi modifikovanog tanina ispitani su prema standardnoj SRPS EN ISO 4628 metodi. Antikorozivni alkidni premazi na bazi modfikovanih tanina pokazali su poboljšane antikorozione karakteristike i adheziju u poređenju sa alkidnim premazom na bazi cink-fosfata. Alkidni premazi koji sadrže dvostepeno modifikovani tanin sa LFA i 2-amino-5-merkapto-1,3,4-tiadiazolom pokazali su najbolje antikorozione karakteristike.",
publisher = "Engineering Society for Corrosion, Belgrade, Serbia",
journal = "Zaštita materijala",
title = "Modified tannins for alkyd based anticorrosive coatings, Primena modifikovanih tanina u antikorozionim alkidnim premazima",
pages = "95-81",
number = "1",
volume = "60",
doi = "10.5937/zasmat1901081M"
}

Milošević, M. D., Daničić, D., Kovačina, J. N., Bugarčić, M., Rusmirović, J., Kovačević, T.,& Marinković, A.. (2019). Modified tannins for alkyd based anticorrosive coatings. in Zaštita materijala
Engineering Society for Corrosion, Belgrade, Serbia., 60(1), 81-95.
https://doi.org/10.5937/zasmat1901081M

Milošević MD, Daničić D, Kovačina JN, Bugarčić M, Rusmirović J, Kovačević T, Marinković A. Modified tannins for alkyd based anticorrosive coatings. in Zaštita materijala. 2019;60(1):81-95.
doi:10.5937/zasmat1901081M .

Milošević, Milena D., Daničić, Dunja, Kovačina, Jovanka N., Bugarčić, Mladen, Rusmirović, Jelena, Kovačević, Tihomir, Marinković, Aleksandar, "Modified tannins for alkyd based anticorrosive coatings" in Zaštita materijala, 60, no. 1 (2019):81-95,
https://doi.org/10.5937/zasmat1901081M . .

TY  - JOUR
AU  - Drah, Abdusalam
AU  - Tomić, Nataša
AU  - Vuksanović, Marija M.
AU  - Đokić, Veljko
AU  - Daničić, Dunja
AU  - Marinković, Aleksandar
AU  - Jančić-Heinemann, Radmila
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3805
AB  - Commercial alumina wiskers (Al2O3 w) and synthesized alumina particles via sol-gel technique (Al2O3 m) were used as reinforcement in unsaturated polyester resins (UPR). Composite materials with the addition of 0.1 wt. %, 0.25 wt. %, 0.5 wt. %, 1.0 wt. %. i 2.5 wt. % of alumina based particles were obtained. Structural analysis of used alumina reinforcement and obtained UPR/Al2O3 composites was performed by FTIR spectroscopy. Morphology was studied by scanning electron microscopy (SEM). The microhardness test was done using the Vikers method. Obtained results showed an increase of microhardness of UPR/Al2O3 w composites up to 66.4%, while the increase of microhardness of UPR/Al2O3 m composite was up to 52.3% compared to UPR matrix.
AB  - Komercijalni aluminijum oksid u formi viskersa (Al2O3 w) i sintentizovane Al2O3 čestice proizvedene sol-gel tehnikom (Al2O3 m) korišćene su kao ojačanja nezasićenih poliestarskih smola (NZPE). Pri-premljeni su kompozitni materijali sa udelom ojačanja od 0,1 mas. %, 0,25 mas. %, 0,5 mas. %, 1,0 mas. %. i 2,5 mas. %. Strukturna analiza korišćenih ojačanja i dobijenih kompozita NZPE/Al2O3 izvršena je FTIR spektroskopijom. Morfologija korišćenih ojačanja ispitana je pomoću skenirajućeg elektronskog mikroskopa (SEM). Ispitivanje mikrotvrdoće urađeno je Vikersovom metodom. Dobijeni rezultati su pokazali da je povećanje mikrotvrdoće kod kompozita NZPE/Al2O3 w do 66,4% a kod kompozita NZPE/Al2O3 m do 52,3% u odnosu na čistu poliestarsku matricu NZPE.
PB  - Savez inženjera i tehničara Srbije, Beograd
T2  - Tehnika
T1  - Microvickers hardness determination of unsaturated polyester resins reinforced with alumina based reinforcement
T1  - Ispitivanje mikrotvrdoće nezasićenih poliestarskih smola sa ojačanjima na bazi aluminijum oksida
EP  - 625
IS  - 5
SP  - 621
VL  - 73
DO  - 10.5937/tehnika1805621D
ER  - 

@article{
author = "Drah, Abdusalam and Tomić, Nataša and Vuksanović, Marija M. and Đokić, Veljko and Daničić, Dunja and Marinković, Aleksandar and Jančić-Heinemann, Radmila",
year = "2018",
abstract = "Commercial alumina wiskers (Al2O3 w) and synthesized alumina particles via sol-gel technique (Al2O3 m) were used as reinforcement in unsaturated polyester resins (UPR). Composite materials with the addition of 0.1 wt. %, 0.25 wt. %, 0.5 wt. %, 1.0 wt. %. i 2.5 wt. % of alumina based particles were obtained. Structural analysis of used alumina reinforcement and obtained UPR/Al2O3 composites was performed by FTIR spectroscopy. Morphology was studied by scanning electron microscopy (SEM). The microhardness test was done using the Vikers method. Obtained results showed an increase of microhardness of UPR/Al2O3 w composites up to 66.4%, while the increase of microhardness of UPR/Al2O3 m composite was up to 52.3% compared to UPR matrix., Komercijalni aluminijum oksid u formi viskersa (Al2O3 w) i sintentizovane Al2O3 čestice proizvedene sol-gel tehnikom (Al2O3 m) korišćene su kao ojačanja nezasićenih poliestarskih smola (NZPE). Pri-premljeni su kompozitni materijali sa udelom ojačanja od 0,1 mas. %, 0,25 mas. %, 0,5 mas. %, 1,0 mas. %. i 2,5 mas. %. Strukturna analiza korišćenih ojačanja i dobijenih kompozita NZPE/Al2O3 izvršena je FTIR spektroskopijom. Morfologija korišćenih ojačanja ispitana je pomoću skenirajućeg elektronskog mikroskopa (SEM). Ispitivanje mikrotvrdoće urađeno je Vikersovom metodom. Dobijeni rezultati su pokazali da je povećanje mikrotvrdoće kod kompozita NZPE/Al2O3 w do 66,4% a kod kompozita NZPE/Al2O3 m do 52,3% u odnosu na čistu poliestarsku matricu NZPE.",
publisher = "Savez inženjera i tehničara Srbije, Beograd",
journal = "Tehnika",
title = "Microvickers hardness determination of unsaturated polyester resins reinforced with alumina based reinforcement, Ispitivanje mikrotvrdoće nezasićenih poliestarskih smola sa ojačanjima na bazi aluminijum oksida",
pages = "625-621",
number = "5",
volume = "73",
doi = "10.5937/tehnika1805621D"
}

Drah, A., Tomić, N., Vuksanović, M. M., Đokić, V., Daničić, D., Marinković, A.,& Jančić-Heinemann, R.. (2018). Microvickers hardness determination of unsaturated polyester resins reinforced with alumina based reinforcement. in Tehnika
Savez inženjera i tehničara Srbije, Beograd., 73(5), 621-625.
https://doi.org/10.5937/tehnika1805621D

Drah A, Tomić N, Vuksanović MM, Đokić V, Daničić D, Marinković A, Jančić-Heinemann R. Microvickers hardness determination of unsaturated polyester resins reinforced with alumina based reinforcement. in Tehnika. 2018;73(5):621-625.
doi:10.5937/tehnika1805621D .

Drah, Abdusalam, Tomić, Nataša, Vuksanović, Marija M., Đokić, Veljko, Daničić, Dunja, Marinković, Aleksandar, Jančić-Heinemann, Radmila, "Microvickers hardness determination of unsaturated polyester resins reinforced with alumina based reinforcement" in Tehnika, 73, no. 5 (2018):621-625,
https://doi.org/10.5937/tehnika1805621D . .

TY  - JOUR
AU  - Milosavljević, Milutin
AU  - Babincev, Ljiljana M.
AU  - Belošević, Svetlana
AU  - Daničić, Dunja
AU  - Milošević, Milena D.
AU  - Rusmirović, Jelena
AU  - Marinković, Aleksandar
PY  - 2018
UR  - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3903
AB  - The innovative laboratory procedure for the synthesis of copper(II) hydroxide in the form of the aqueous suspension was developed. The reaction mechanism consists of the reaction between copper(II) sulphate pentahydrate and sodium carbonate by successive ion exchange of carbonate ions with the hydroxide ones in a multistep process. Production of copper(II) carbonate and sodium sulphate by reacting of copper(II) sulphate with sodium carbonate was followed by addition of sodium hydroxide solution whereby the product, copper(II) hydroxide, was obtained by releasing an equimolar amount of sodium carbonate. It was determined that, the equimolar reaction of copper(II) sulphate and sodium hydroxide lead to the maximal reactants exploitation. Sodium phosphate, formed in the final process stage by addition of 10% phosphoric acid solution, acted as a copper(II) hydroxide stabilizer. High yield of the product was obtained by optimizing the synthesis parameters: reaction time, molar ratio of reactants and the reaction temperature. The obtained product was formulated to obtain a commercial product, which is used as a fungicide and bactericide.
PB  - Savez hemijskih inženjera, Beograd
T2  - Hemijska industrija
T1  - Innovative environmentally friendly technology for copper(II) hydroxide production
EP  - 370
IS  - 6
SP  - 363
VL  - 72
DO  - 10.2298/HEMIND180630023M
ER  - 

@article{
author = "Milosavljević, Milutin and Babincev, Ljiljana M. and Belošević, Svetlana and Daničić, Dunja and Milošević, Milena D. and Rusmirović, Jelena and Marinković, Aleksandar",
year = "2018",
abstract = "The innovative laboratory procedure for the synthesis of copper(II) hydroxide in the form of the aqueous suspension was developed. The reaction mechanism consists of the reaction between copper(II) sulphate pentahydrate and sodium carbonate by successive ion exchange of carbonate ions with the hydroxide ones in a multistep process. Production of copper(II) carbonate and sodium sulphate by reacting of copper(II) sulphate with sodium carbonate was followed by addition of sodium hydroxide solution whereby the product, copper(II) hydroxide, was obtained by releasing an equimolar amount of sodium carbonate. It was determined that, the equimolar reaction of copper(II) sulphate and sodium hydroxide lead to the maximal reactants exploitation. Sodium phosphate, formed in the final process stage by addition of 10% phosphoric acid solution, acted as a copper(II) hydroxide stabilizer. High yield of the product was obtained by optimizing the synthesis parameters: reaction time, molar ratio of reactants and the reaction temperature. The obtained product was formulated to obtain a commercial product, which is used as a fungicide and bactericide.",
publisher = "Savez hemijskih inženjera, Beograd",
journal = "Hemijska industrija",
title = "Innovative environmentally friendly technology for copper(II) hydroxide production",
pages = "370-363",
number = "6",
volume = "72",
doi = "10.2298/HEMIND180630023M"
}

Milosavljević, M., Babincev, L. M., Belošević, S., Daničić, D., Milošević, M. D., Rusmirović, J.,& Marinković, A.. (2018). Innovative environmentally friendly technology for copper(II) hydroxide production. in Hemijska industrija
Savez hemijskih inženjera, Beograd., 72(6), 363-370.
https://doi.org/10.2298/HEMIND180630023M

Milosavljević M, Babincev LM, Belošević S, Daničić D, Milošević MD, Rusmirović J, Marinković A. Innovative environmentally friendly technology for copper(II) hydroxide production. in Hemijska industrija. 2018;72(6):363-370.
doi:10.2298/HEMIND180630023M .

Milosavljević, Milutin, Babincev, Ljiljana M., Belošević, Svetlana, Daničić, Dunja, Milošević, Milena D., Rusmirović, Jelena, Marinković, Aleksandar, "Innovative environmentally friendly technology for copper(II) hydroxide production" in Hemijska industrija, 72, no. 6 (2018):363-370,
https://doi.org/10.2298/HEMIND180630023M . .