TY  - JOUR
AU  - Radojković, Bojana
AU  - Jegdić, Bore
AU  - Pejić, Jovanka
AU  - Marunkić, Dunja
AU  - Simović, Anđela
AU  - Eraković Pantović, Sanja
PY  - 2023
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/7227
AB  - The influence of welding current and nitrogen content in argon shielding gas on the resistance of the welded joint (weld metal and heat-affected zone [HAZ]) of the stainless steel X5CrNi18-10 to the formation and growth of pits was investigated. Also, the susceptibility of the welded joint to intergranular corrosion was examined. Pitting corrosion resistance indicators were determined based on anodic potentiodynamic polarization measurements in NaCl + Na2SO4 solution, while susceptibility to intergranular corrosion was determined by the potentiokinetic method with a double loop (DL EPR). SEM/EDS was used to analyze the microstructure. It has been shown that higher nitrogen content in shielding gas leads to an increase in the resistance of welded joints (weld metal and HAZ) to the pit formation. However, an improvement in the resistance to the pit formation leads to a decline in the resistance of the welded joint to pit growth. An explanation of this phenomenon is proposed. Also, it was shown that the increase of the welding current increases the susceptibility of the welded joint to intergranular corrosion, while the higher nitrogen content has no effect.
PB  - Wiley
T2  - Materials and Corrosion
T1  - Influence of nitrogen content on the pit formation and pit propagation in the welded joints of X5CrNi18‐10 stainless steel
DO  - 10.1002/maco.202314120
ER  - 

@article{
author = "Radojković, Bojana and Jegdić, Bore and Pejić, Jovanka and Marunkić, Dunja and Simović, Anđela and Eraković Pantović, Sanja",
year = "2023",
abstract = "The influence of welding current and nitrogen content in argon shielding gas on the resistance of the welded joint (weld metal and heat-affected zone [HAZ]) of the stainless steel X5CrNi18-10 to the formation and growth of pits was investigated. Also, the susceptibility of the welded joint to intergranular corrosion was examined. Pitting corrosion resistance indicators were determined based on anodic potentiodynamic polarization measurements in NaCl + Na2SO4 solution, while susceptibility to intergranular corrosion was determined by the potentiokinetic method with a double loop (DL EPR). SEM/EDS was used to analyze the microstructure. It has been shown that higher nitrogen content in shielding gas leads to an increase in the resistance of welded joints (weld metal and HAZ) to the pit formation. However, an improvement in the resistance to the pit formation leads to a decline in the resistance of the welded joint to pit growth. An explanation of this phenomenon is proposed. Also, it was shown that the increase of the welding current increases the susceptibility of the welded joint to intergranular corrosion, while the higher nitrogen content has no effect.",
publisher = "Wiley",
journal = "Materials and Corrosion",
title = "Influence of nitrogen content on the pit formation and pit propagation in the welded joints of X5CrNi18‐10 stainless steel",
doi = "10.1002/maco.202314120"
}

Radojković, B., Jegdić, B., Pejić, J., Marunkić, D., Simović, A.,& Eraković Pantović, S.. (2023). Influence of nitrogen content on the pit formation and pit propagation in the welded joints of X5CrNi18‐10 stainless steel. in Materials and Corrosion
Wiley..
https://doi.org/10.1002/maco.202314120

Radojković B, Jegdić B, Pejić J, Marunkić D, Simović A, Eraković Pantović S. Influence of nitrogen content on the pit formation and pit propagation in the welded joints of X5CrNi18‐10 stainless steel. in Materials and Corrosion. 2023;.
doi:10.1002/maco.202314120 .

Radojković, Bojana, Jegdić, Bore, Pejić, Jovanka, Marunkić, Dunja, Simović, Anđela, Eraković Pantović, Sanja, "Influence of nitrogen content on the pit formation and pit propagation in the welded joints of X5CrNi18‐10 stainless steel" in Materials and Corrosion (2023),
https://doi.org/10.1002/maco.202314120 . .

TY  - JOUR
AU  - Kovačina, Jovanka
AU  - Jegdić, Bore
AU  - Radojković, Bojana
AU  - Marunkić, Dunja
AU  - Stevanović, Sanja
AU  - Simović, Anđela
PY  - 2021
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/4824
AB  - The influence of microstructure and surface roughness of the X5CrNi18-10 austenitic stainless steel-welded joint on resistance to uniform, pitting, and intergranular corrosion, as well as on the stability of the passive film, was evaluated. The microstructure was revealed by optical microscopy and scanning electron microscopy, whereas surface topography and roughness levels were determined by atomic force microscopy. Corrosion characteristics were obtained by the electrochemical potentiokinetic reactivation method with double loop, electrochemical impedance spectroscopy method, as well as by potentiodynamic measurements. The degree of sensitization of heat-affected zone (HAZ) was significantly lower than the threshold value required for the occurrence of intergranular corrosion. However, HAZ showed a significantly greater tendency to pitting and uniform corrosion compared to weld metal and base metal. No effect of roughness levels (RMS from 3.6 to 54 nm) on the pitting potential value of the welded joint was observed (unlike in HAZ). The polished surface shows significantly higher corrosion resistance than the grinded surface. Generally, polishing improved corrosion resistance, especially in HAZ, which is very important because HAZ is a critical place for the occurrence of pitting and other types of corrosion.
PB  - Wiley
T2  - Materials and Corrosion
T1  - Influence of microstructure and roughness level on corrosion resistance of the austenitic stainless steel welded joint
VL  - 72
IS  - 7
SP  - 1215
EP  - 1231
DO  - 10.1002/maco.202012241
ER  - 

@article{
author = "Kovačina, Jovanka and Jegdić, Bore and Radojković, Bojana and Marunkić, Dunja and Stevanović, Sanja and Simović, Anđela",
year = "2021",
abstract = "The influence of microstructure and surface roughness of the X5CrNi18-10 austenitic stainless steel-welded joint on resistance to uniform, pitting, and intergranular corrosion, as well as on the stability of the passive film, was evaluated. The microstructure was revealed by optical microscopy and scanning electron microscopy, whereas surface topography and roughness levels were determined by atomic force microscopy. Corrosion characteristics were obtained by the electrochemical potentiokinetic reactivation method with double loop, electrochemical impedance spectroscopy method, as well as by potentiodynamic measurements. The degree of sensitization of heat-affected zone (HAZ) was significantly lower than the threshold value required for the occurrence of intergranular corrosion. However, HAZ showed a significantly greater tendency to pitting and uniform corrosion compared to weld metal and base metal. No effect of roughness levels (RMS from 3.6 to 54 nm) on the pitting potential value of the welded joint was observed (unlike in HAZ). The polished surface shows significantly higher corrosion resistance than the grinded surface. Generally, polishing improved corrosion resistance, especially in HAZ, which is very important because HAZ is a critical place for the occurrence of pitting and other types of corrosion.",
publisher = "Wiley",
journal = "Materials and Corrosion",
title = "Influence of microstructure and roughness level on corrosion resistance of the austenitic stainless steel welded joint",
volume = "72",
number = "7",
pages = "1215-1231",
doi = "10.1002/maco.202012241"
}

Kovačina, J., Jegdić, B., Radojković, B., Marunkić, D., Stevanović, S.,& Simović, A.. (2021). Influence of microstructure and roughness level on corrosion resistance of the austenitic stainless steel welded joint. in Materials and Corrosion
Wiley., 72(7), 1215-1231.
https://doi.org/10.1002/maco.202012241

Kovačina J, Jegdić B, Radojković B, Marunkić D, Stevanović S, Simović A. Influence of microstructure and roughness level on corrosion resistance of the austenitic stainless steel welded joint. in Materials and Corrosion. 2021;72(7):1215-1231.
doi:10.1002/maco.202012241 .

Kovačina, Jovanka, Jegdić, Bore, Radojković, Bojana, Marunkić, Dunja, Stevanović, Sanja, Simović, Anđela, "Influence of microstructure and roughness level on corrosion resistance of the austenitic stainless steel welded joint" in Materials and Corrosion, 72, no. 7 (2021):1215-1231,
https://doi.org/10.1002/maco.202012241 . .

TY  - CONF
AU  - Kovačina, Jovanka
AU  - Marunkić, Dunja
AU  - Simović, Anđela
AU  - Radojković, Bojana
AU  - Jegdić, Bore
AU  - Marinković, Aleksandar D.
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3942
AB  - Aluminium AA7075 alloy with its low density and good mechanical properties, widely responds to the
requirements of aerospace, navy, and defense industries. However, corrosion is the most common problem that affects
the reliability and service life of components and constructions based on this alloy. One of the most practical methods
for protecting metals from corrosion is the use of inhibitors. Chromates are known as excellent inhibitors but chromate
compounds are highly toxic, carcinogenic, and thus hazardous to humans and the environment. The aim of this study
was to synthesize an organic eco-friendly compound (cerium-cysteine) and to investigate its inhibitory property on
aluminum alloy AA7075-T6. Rare-earth metals are effective and environmentally friendly substances for aluminium
protection as well as cysteine that can be found in many proteins and enzymes such as the keratin in hair. The
synthesized inhibitor was confirmed and analyzed by FTIR. The survey of samples corrosion resistance was conducted
by three electrochemical methods: linear polarization resistance (LPR), electrochemical impedance spectroscopy (EIS),
and polarization measurements (Epit) in a 0.1M NaCl solution at room temperature. Different concentrations of ceriumcysteine were used to find the best efficiency. The best results were then tested for time dependence (up to 72 h). The
inhibitory effectiveness of the cerium complex is shown to depend on a variety of factors such as concentration and time
dependence.
PB  - Belgrade : Military Technical Institute
C3  - 9th International Scientific Conference od Defensive Technologies OTEH 2020
T1  - Cerium-cysteine complex inhibitor for aluminium alloy AA7075-T6
UR  - https://hdl.handle.net/21.15107/rcub_cer_3942
ER  - 

@conference{
author = "Kovačina, Jovanka and Marunkić, Dunja and Simović, Anđela and Radojković, Bojana and Jegdić, Bore and Marinković, Aleksandar D.",
year = "2020",
abstract = "Aluminium AA7075 alloy with its low density and good mechanical properties, widely responds to the
requirements of aerospace, navy, and defense industries. However, corrosion is the most common problem that affects
the reliability and service life of components and constructions based on this alloy. One of the most practical methods
for protecting metals from corrosion is the use of inhibitors. Chromates are known as excellent inhibitors but chromate
compounds are highly toxic, carcinogenic, and thus hazardous to humans and the environment. The aim of this study
was to synthesize an organic eco-friendly compound (cerium-cysteine) and to investigate its inhibitory property on
aluminum alloy AA7075-T6. Rare-earth metals are effective and environmentally friendly substances for aluminium
protection as well as cysteine that can be found in many proteins and enzymes such as the keratin in hair. The
synthesized inhibitor was confirmed and analyzed by FTIR. The survey of samples corrosion resistance was conducted
by three electrochemical methods: linear polarization resistance (LPR), electrochemical impedance spectroscopy (EIS),
and polarization measurements (Epit) in a 0.1M NaCl solution at room temperature. Different concentrations of ceriumcysteine were used to find the best efficiency. The best results were then tested for time dependence (up to 72 h). The
inhibitory effectiveness of the cerium complex is shown to depend on a variety of factors such as concentration and time
dependence.",
publisher = "Belgrade : Military Technical Institute",
journal = "9th International Scientific Conference od Defensive Technologies OTEH 2020",
title = "Cerium-cysteine complex inhibitor for aluminium alloy AA7075-T6",
url = "https://hdl.handle.net/21.15107/rcub_cer_3942"
}

Kovačina, J., Marunkić, D., Simović, A., Radojković, B., Jegdić, B.,& Marinković, A. D.. (2020). Cerium-cysteine complex inhibitor for aluminium alloy AA7075-T6. in 9th International Scientific Conference od Defensive Technologies OTEH 2020
Belgrade : Military Technical Institute..
https://hdl.handle.net/21.15107/rcub_cer_3942

Kovačina J, Marunkić D, Simović A, Radojković B, Jegdić B, Marinković AD. Cerium-cysteine complex inhibitor for aluminium alloy AA7075-T6. in 9th International Scientific Conference od Defensive Technologies OTEH 2020. 2020;.
https://hdl.handle.net/21.15107/rcub_cer_3942 .

Kovačina, Jovanka, Marunkić, Dunja, Simović, Anđela, Radojković, Bojana, Jegdić, Bore, Marinković, Aleksandar D., "Cerium-cysteine complex inhibitor for aluminium alloy AA7075-T6" in 9th International Scientific Conference od Defensive Technologies OTEH 2020 (2020),
https://hdl.handle.net/21.15107/rcub_cer_3942 .

TY  - JOUR
AU  - Radojković, Bojana
AU  - Kovačina, Jovanka
AU  - Jegdić, Bore
AU  - Bobić, Biljana
AU  - Alić, Behar
AU  - Marunkić, Dunja
AU  - Simović, Anđela
PY  - 2020
UR  - https://cer.ihtm.bg.ac.rs/handle/123456789/3838
AB  - This study considers the corrosion behavior of the X5CrNi18 10 stainless steel‐welded joint in NaCl solution, with and without the presence of several corrosion inhibitors (NaNO3 , Ce(NO3)3, and CeCl3). The degree of sensitization of the welded joint to intergranular corrosion is determined using the electrochemical potentio kinetic reactivation method with a double‐loop method. Pitting corrosion tests are performed by the potentiodynamic method. Resistance to general corrosion and the stability of the passive film is assessed based on the results of electrochemical impedance spectroscopy measurements, as well as on the values of the corrosion and passivation current. The main goal of this study is to determine the relation of the welded joint microstructure to general and pitting corrosion in the presence of the corrosion inhibitors. The value of pitting potential for the base metal and weld metal in the presence of the NaNO3 or Ce(NO3)3 inhibitor is shifted to potentials in the transpassive area. The pitting potential for the heat‐affected zone also possesses a noticeable higher value. However, nitrate ions do not increase the general corrosion resistance of any part of the welded joint. CeCl3 does not increase resistance to general or pitting corrosion.
PB  - Wiley‐VCH GmbH
T2  - Materials and Corrosion
T1  - Influence of inhibitors on the corrosion behavior of the X5CrNi18 10 stainless steel ‐ welded joint
VL  - 72
SP  - 694
EP  - 707
DO  - 10.1002/maco.202012039
ER  - 

@article{
author = "Radojković, Bojana and Kovačina, Jovanka and Jegdić, Bore and Bobić, Biljana and Alić, Behar and Marunkić, Dunja and Simović, Anđela",
year = "2020",
abstract = "This study considers the corrosion behavior of the X5CrNi18 10 stainless steel‐welded joint in NaCl solution, with and without the presence of several corrosion inhibitors (NaNO3 , Ce(NO3)3, and CeCl3). The degree of sensitization of the welded joint to intergranular corrosion is determined using the electrochemical potentio kinetic reactivation method with a double‐loop method. Pitting corrosion tests are performed by the potentiodynamic method. Resistance to general corrosion and the stability of the passive film is assessed based on the results of electrochemical impedance spectroscopy measurements, as well as on the values of the corrosion and passivation current. The main goal of this study is to determine the relation of the welded joint microstructure to general and pitting corrosion in the presence of the corrosion inhibitors. The value of pitting potential for the base metal and weld metal in the presence of the NaNO3 or Ce(NO3)3 inhibitor is shifted to potentials in the transpassive area. The pitting potential for the heat‐affected zone also possesses a noticeable higher value. However, nitrate ions do not increase the general corrosion resistance of any part of the welded joint. CeCl3 does not increase resistance to general or pitting corrosion.",
publisher = "Wiley‐VCH GmbH",
journal = "Materials and Corrosion",
title = "Influence of inhibitors on the corrosion behavior of the X5CrNi18 10 stainless steel ‐ welded joint",
volume = "72",
pages = "694-707",
doi = "10.1002/maco.202012039"
}

Radojković, B., Kovačina, J., Jegdić, B., Bobić, B., Alić, B., Marunkić, D.,& Simović, A.. (2020). Influence of inhibitors on the corrosion behavior of the X5CrNi18 10 stainless steel ‐ welded joint. in Materials and Corrosion
Wiley‐VCH GmbH., 72, 694-707.
https://doi.org/10.1002/maco.202012039

Radojković B, Kovačina J, Jegdić B, Bobić B, Alić B, Marunkić D, Simović A. Influence of inhibitors on the corrosion behavior of the X5CrNi18 10 stainless steel ‐ welded joint. in Materials and Corrosion. 2020;72:694-707.
doi:10.1002/maco.202012039 .

Radojković, Bojana, Kovačina, Jovanka, Jegdić, Bore, Bobić, Biljana, Alić, Behar, Marunkić, Dunja, Simović, Anđela, "Influence of inhibitors on the corrosion behavior of the X5CrNi18 10 stainless steel ‐ welded joint" in Materials and Corrosion, 72 (2020):694-707,
https://doi.org/10.1002/maco.202012039 . .