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Titolo:
ELECTROCHEMICAL NOISE RESISTANCE AS A TOOL FOR CORROSION RATE PREDICTION
Autore:
GUSMANO G; MONTESPERELLI G; PACETTI S; PETITTI A; DAMICO A;
Indirizzi:
UNIV ROMA TOR VERGATA,DEPT CHEM SCI & TECHNOL,VIA RIC SCI I-00133 ROME ITALY UNIV ROMA TOR VERGATA,DEPT ELECT ENGN I-00133 ROME ITALY
Titolo Testata:
Corrosion
fascicolo: 11, volume: 53, anno: 1997,
pagine: 860 - 868
SICI:
0010-9312(1997)53:11<860:ENRAAT>2.0.ZU;2-6
Fonte:
ISI
Lingua:
ENG
Soggetto:
PITTING CORROSION; PASSIVE METALS; THEORETICAL-ANALYSIS; LOCALIZED CORROSION; INDUCTION PERIOD; STEEL; IMPEDANCE; SYSTEM; FILM;
Keywords:
CARBON STEEL; CORROSION RATE; CURRENT; ELECTROCHEMICAL NOISE; FAST FOURIER TRANSFORM; LINEAR POLARIZATION RESISTANCE; PASSIVATION; PITTING; POTENTIAL; SAMPLING RATE; TYPE 1040 CARBON STEEL;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
35
Recensione:
Indirizzi per estratti:
Citazione:
G. Gusmano et al., "ELECTROCHEMICAL NOISE RESISTANCE AS A TOOL FOR CORROSION RATE PREDICTION", Corrosion, 53(11), 1997, pp. 860-868

Abstract

Current and potential fluctuations (electrochemical noise [EN]) between two nominally identical carbon steel electrodes were recorded in a solution of sodium phosphate (Na3PO4) at different concentrations. After passivation was reached, pitting was induced by addition of chlorides. Data were collected with different sampling rates. Linear polarization resistances (LPR) also were measured. Electrochemical signals were transposed in the frequency domains using the fast Fourier transform. Statistical parameters from the signals in the time and in the frequency domains were compared with corrosion rates (V-c) as measured by LPR. Noise resistance (R-n) also was calculated. From standard deviation (sigma) values of the current and potential noises, pitting attack was revealed at its onset. Good correlation between data from the different techniques was found. R-n gave values proportional to the polarization resistance (R-p). The issue of how sampling rate can affect EN data collection also was addressed.

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Documento generato il 19/09/20 alle ore 09:26:49