Pitting Corrosion of Some Stainless Steel Alloys Preoxidized at Different Conditions

Mahmoud, S. S.; Ahmed, M. M. I.

doi:10.4152/pea.200702237

Cited by 1 publication

(2 citation statements)

References 12 publications

(18 reference statements)

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“…This suggests that the inhibition of the stainless steel corrosion in the presence of PVA occurs by adsorption at site on the metal surface. The percentage inhibition efficiency (IE) of PVA inhibitor was calculated according to the following equation: (2) where R 0 p is the polarization resistance in absence of PVA and R p is the polarization resistance in presence of PVA. The values of inhibition efficiency increase with PVA concentration, reaching a maximum value of 73.7% at 3 % PVA concentration, nearly equal to the value obtained from Tafel polarization.…”

Section: Electrochemical Measurements Polarization Curvesmentioning

confidence: 99%

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Surface Analysis of Inhibitor Film Formed by Poly(Vinyl Alcohol) on Stainless Steel in Sodium Chloride Solution

Samide

Ciuciu

Negrilǎ

2010

Port. Electrochim. Acta

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The corrosion inhibition of stainless steel in 0.9% NaCl solution in presence of poly(vinyl alcohol) (PVA) is discussed according to electrochemical measurements, such as potentiodynamic polarization and electrochemical impedance spectroscopy (EIS).The morphology of the surface was analyzed using Scanning Electron Microscopy (SEM). The composition of the layer formed on stainless steel surface was estimated using X-ray Photoelectron Spectroscopy (XPS) technique. Electrochemical measurements indicated that the presence of PVA in NaCl solution decreases the corrosion current and increases the polarization resistance. The values of inhibition efficiency obtained from polarization curves and EIS measurements are in good agreement. In absence and in presence of PVA, SEM images showed that the stainless steel surface was covered with a non-uniform layer and a uniform adsorbed film, respectively. XPS analysis indicated that the surface layer consists of PVA containing a small amount of other elements, such as Na and Cl.

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Section: Electrochemical Measurements Polarization Curvesmentioning

confidence: 99%

“…304L stainless steel offers good mechanical and corrosion properties, as well as oxidation resistance. Nevertheless, its use is limited due to its susceptibility to some types of local corrosion attack, such as pitting and stress corrosion in the presence of Cl -ions [1,2].…”

Section: Introductionmentioning

confidence: 99%