Electroplated coatings on the basis of iron on steel and ways of increase of their corrosion resistance
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621.357 (14)
Electrotehnică (487)
SM ISO690:2012
PARSHUTIN, Vladimir; PASINKOVSKY, Emil; KOVALI, Alexandr; SHOLTOYAN, Nicolai; SOCOLOVA, Ludmila; SOCOLOV, Vasile. Electroplated coatings on the basis of iron on steel and ways of increase of their corrosion resistance. In: Noosfera. Revista ştiinţifică de educaţie, spiritualitate şi cultură ecologică. 2015, nr. 14, pp. 79-85. ISSN 1857-3517.
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Noosfera. Revista ştiinţifică de educaţie, spiritualitate şi cultură ecologică
Numărul 14 / 2015 / ISSN 1857-3517

Electroplated coatings on the basis of iron on steel and ways of increase of their corrosion resistance

CZU: 621.357
Pag. 79-85

Parshutin Vladimir1, Pasinkovsky Emil1, Kovali Alexandr1, Sholtoyan Nicolai1, Socolova Ludmila2, Socolov Vasile2
 
1 Institute of Applied Physics, Academy of Sciences of Moldova,
2 Free International University of Moldova
 
Disponibil în IBN: 28 octombrie 2015


Rezumat

It were studied two methods of increasing the corrosion resistance of iron-base electroplates: alloying the electroplates with copper, and through the thermochemical treatment of the electroplates. It was established that alloying the iron coatings with copper conducts to changes in the surfaces morphology, physicomechanical, corrosion and electrochemical properties. The corrosion tests have shown that samples, coated with the iron-copper alloy, corrode in the NaCl solution by ~ 1.4, but in 0.05 M solution of Na2SO4 – by ~ 2 times slowly than with the iron coatings. It is determined that at the nitration of iron coating the obtained conversion layer is less porous and provides a higher corrosion resistance. This is confirmed through he fact that corrosion potential moves in positive direction with 0.815 V in comparison with the 45 steel, which wasn’t exposed to the thermal treatment, and with 0.448 V in comparison with the 45 steel, nitrided in the same conditions as the electroplate. Accordingly, the currents of anodic dissolution decrease with 3 and 4-5 orders

Были изучены два метода повышения коррозионной стойкости железа гальванических покрытий на основе железа: легирование медью, химико-термическая обработка. Было установлено, что легирование железных покрытий с медью ведет к изменениям в морфологии поверхностей; физико- механических, коррозионных и электрохимических свойствах. Коррозионные испытания показали, что образцы, покрытые железо-медным сплавом, подвержены коррозии в растворе NaCl в 1,4 раза, а в 0,05М растворе Na2SO4 – в 2 раза медленнее, чем у железных покрытий. Установлено, что нитрование железных покрытий делает слой менее пористым и обеспечивает более высокую коррозионную стойкость.

Cuvinte-cheie
iron and iron-copper electroplates, nitration, corrosion potential,

corrosion