Corrosion resistance of metalized layers on steel parts in ventilation mill
Apstrakt
Corrosion behavior of metalized layers, obtained by Plasma Transferred Arc (PTA) process and by High-Velocity Oxygen Fuel (HVOF) process with the purpose to improve the wear resistance of vital parts of ventilation mill in a thermal power plant, has been tested. The test is performed using three electrochemical techniques, in a solution containing chloride and sulfate ions. It is shown that the steel surface (base metal) dissolves uniformly, without pitting or other forms of local dissolution. Morphology of metalized layers surface indicates that dissolution is non-uniform, but it still can be considered as general corrosion. The corrosion rate of base metal and metalized layer obtained by PTA process is rather low, while the corrosion rate of the metalized layer obtained by HVOF process is much higher. Also, the difference in corrosion potentials between the base metal and the HVOF layer is pretty high but slightly less than maximum allowed difference (prescribed by the standard), to ...avoid excessive galvanic corrosion. The values of corrosion rate obtained by different electrochemical techniques are in excellent agreement.
Ključne reči:
Corrosion / metalized layers / electrochemical methodsIzvor:
Metallurgical and Materials Engineering, 2018, 24, 2, 123-132Izdavač:
- Belgrade : Association of Metallurgical Engineers of Serbia
Finansiranje / projekti:
- Istraživanje i optimizacija tehnoloških i funkcionalnih performansi ventilacionog mlina termoelektrane Kostolac B (RS-MESTD-Technological Development (TD or TR)-34028)
- Razvoj triboloških mikro/nano dvokomponentnih i hibridnih samopodmazujućih kompozita (RS-MESTD-Technological Development (TD or TR)-35021)
Institucija/grupa
IHTMTY - JOUR AU - Jegdić, Bore AU - Radojković, Bojana AU - Bobić, Biljana AU - Krmar, Marija AU - Ristić, Slavica S. PY - 2018 UR - https://cer.ihtm.bg.ac.rs/handle/123456789/2448 AB - Corrosion behavior of metalized layers, obtained by Plasma Transferred Arc (PTA) process and by High-Velocity Oxygen Fuel (HVOF) process with the purpose to improve the wear resistance of vital parts of ventilation mill in a thermal power plant, has been tested. The test is performed using three electrochemical techniques, in a solution containing chloride and sulfate ions. It is shown that the steel surface (base metal) dissolves uniformly, without pitting or other forms of local dissolution. Morphology of metalized layers surface indicates that dissolution is non-uniform, but it still can be considered as general corrosion. The corrosion rate of base metal and metalized layer obtained by PTA process is rather low, while the corrosion rate of the metalized layer obtained by HVOF process is much higher. Also, the difference in corrosion potentials between the base metal and the HVOF layer is pretty high but slightly less than maximum allowed difference (prescribed by the standard), to avoid excessive galvanic corrosion. The values of corrosion rate obtained by different electrochemical techniques are in excellent agreement. PB - Belgrade : Association of Metallurgical Engineers of Serbia T2 - Metallurgical and Materials Engineering T1 - Corrosion resistance of metalized layers on steel parts in ventilation mill VL - 24 IS - 2 SP - 123 EP - 132 DO - 10.30544/340 ER -
@article{ author = "Jegdić, Bore and Radojković, Bojana and Bobić, Biljana and Krmar, Marija and Ristić, Slavica S.", year = "2018", abstract = "Corrosion behavior of metalized layers, obtained by Plasma Transferred Arc (PTA) process and by High-Velocity Oxygen Fuel (HVOF) process with the purpose to improve the wear resistance of vital parts of ventilation mill in a thermal power plant, has been tested. The test is performed using three electrochemical techniques, in a solution containing chloride and sulfate ions. It is shown that the steel surface (base metal) dissolves uniformly, without pitting or other forms of local dissolution. Morphology of metalized layers surface indicates that dissolution is non-uniform, but it still can be considered as general corrosion. The corrosion rate of base metal and metalized layer obtained by PTA process is rather low, while the corrosion rate of the metalized layer obtained by HVOF process is much higher. Also, the difference in corrosion potentials between the base metal and the HVOF layer is pretty high but slightly less than maximum allowed difference (prescribed by the standard), to avoid excessive galvanic corrosion. The values of corrosion rate obtained by different electrochemical techniques are in excellent agreement.", publisher = "Belgrade : Association of Metallurgical Engineers of Serbia", journal = "Metallurgical and Materials Engineering", title = "Corrosion resistance of metalized layers on steel parts in ventilation mill", volume = "24", number = "2", pages = "123-132", doi = "10.30544/340" }
Jegdić, B., Radojković, B., Bobić, B., Krmar, M.,& Ristić, S. S.. (2018). Corrosion resistance of metalized layers on steel parts in ventilation mill. in Metallurgical and Materials Engineering Belgrade : Association of Metallurgical Engineers of Serbia., 24(2), 123-132. https://doi.org/10.30544/340
Jegdić B, Radojković B, Bobić B, Krmar M, Ristić SS. Corrosion resistance of metalized layers on steel parts in ventilation mill. in Metallurgical and Materials Engineering. 2018;24(2):123-132. doi:10.30544/340 .
Jegdić, Bore, Radojković, Bojana, Bobić, Biljana, Krmar, Marija, Ristić, Slavica S., "Corrosion resistance of metalized layers on steel parts in ventilation mill" in Metallurgical and Materials Engineering, 24, no. 2 (2018):123-132, https://doi.org/10.30544/340 . .