Corrosion inhibition of carbon steel (K-55) in CO2-saturated 0.5 M KCl solution by polyacrylamide

• Autorzy: Palumbo G. , Andrzejczuk M. , Mizera J. , Banaś J.

Identyfikatory

DOI

10.15199/40.2015.11.7

Warianty tytułu

PL

Inhibitujący wpływ poli(akryloamidu) na korozję stali K55 w 0,5 M roztworze KC l nasyconym CO2

• Języki publikacji: EN

Abstrakty

EN

Polyacrylamide (PAM) was used to investigate the inhibition efficiency on corrosion of carbon steel (K-55) in 0.5 M KCl solution with CO2 through AC impedance, polarization curves, and SEM techniques under static and hydrodynamic conditions. The electrochemical experimental results indicated that carbon steel showed active dissolution behaviour in the absence and the presence of the inhibitor PAM. However, the Nyquist diagrams showed increase in RP values in the presence of inhibitor under static and hydrodynamic conditions, thus increasing inhibition efficiency. Potentiodynamic curves suggested that the inhibitor is mixed type in nature. SEM results showed that PAM was able to influence the flow dynamic properties of solution by decreasing the friction (wall shear-stresses) between the metal surface and flowing media, thus reducing the risk of flow induced localized corrosion.

PL

W publikacji zawarto wyniki badań skuteczności antykorozyjnej inhibitora poliakrylamidowego (PAM) zastosowanego do hamowania procesów korozyjnych stali typu K55 w środowisku 0,5M KCl z obecnością CO2. Badania elektrochemiczne prowadzono w warunkach stacjonarnych oraz w warunkach przepływu z użyciem technik impedancyjnych i polaryzacyjnych. Obserwacje powierzchni próbki prowadzono z użyciem techniki elektronowej SEM. Wyniki badań wskazują, że stal K55 wykazała aktywność elektrochemiczną zarówno przy nieobecności jak i w obecności inhibitora PAM. Dalsze badania impedancyjne wykazały jednak, że w obecności inhibitora następuje wzrost wartości Rp badanej próbki, zarówno w warunkach stacjonarnych jak i hydrodynamicznych. To wskazuje na skuteczność hamowania korozji przez inhibitor typu PAM. Krzywe polaryzacji natomiast sugerują katodowo-anodowy charakter inhibitora. Z kolei obserwacje SEM wykazały wpływ inhibitora na własności hydrodynamiczne roztworu poprzez zmniejszenie tarcia pomiędzy powierzchnią metalu i przepływającym medium, redukując tym samym ryzyko powstania ognisk korozji wywołanej przepływem.

Słowa kluczowe

EN

carbon steel; polyacrylamide; corrosion inhibitor; polarization

PL

stal węglowa; poliakrylamid; inhibitor korozji; polaryzacja

• Wydawca: Wydawnictwo SIGMA-NOT
• Czasopismo: Ochrona przed Korozją
• Rocznik: 2015
• Tom: nr 11
• Strony: 396--399
• Opis fizyczny: Bibliogr. 37 poz., rys., tab., wykr.

Twórcy

autor

Palumbo G.

• AGH-University of Science and Technology, Faculty of Foundry Engineering, Reymonta 23, 30-059 Krakow, Poland

autor

Andrzejczuk M.

• Warsaw University of Technology, Faculty of Materials Science and Engineering, Woloska 41, 02-507 Warsaw, Poland

autor

Mizera J.

• Warsaw University of Technology, Faculty of Materials Science and Engineering, Woloska 41, 02-507 Warsaw, Poland

autor

Banaś J.

• AGH-University of Science and Technology, Faculty of Foundry Engineering, Reymonta 23, 30-059 Krakow, Poland

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