Electrochemical Noise Analysis of Tribocorrosion Processes under Steady-State Friction Regime

Deforge, Damien; Huet, François; Nogueira, R.P.; Ponthiaux, Pierre; Wenger, F.

doi:10.5006/1.3279910

Cited by 24 publications

(13 citation statements)

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“…Such an approach was developed recently through a finite element model, 19 which describes the geometrical characteristics of the sample and the heterogeneous state of the surface.…”

Section: Resultsmentioning

confidence: 99%

Local Electrochemical Studies and Surface Analysis on Worn Surfaces

Krawiec

Vignal

Heintz

et al. 2008

J. Electrochem. Soc.

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International audienceSpecimens of duplex stainless steel UNS S32304 immersed in distilled water were worn under sliding friction conditions. The electrochemical microcell technique and local Auger spectroscopy were then applied to these heterogeneous surfaces to determine the influence of surface chemical composition and surface defects on the electrochemical behavior of each phase of the stainless steel in and out of the wear track. Experiments were performed both in 1 M NaCl, pH 3 (where the passive film is stable), and 0.5 M HCl (where an active peak is observed). In addition, the scanning vibrating electrode technique was combined with a modified microcell to study microgalvanic processes between the surrounding passive surface and the track at the OCP value

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“…Such an approach was developed recently through a finite element model, 19 which describes the geometrical characteristics of the sample and the heterogeneous state of the surface.…”

Section: Resultsmentioning

confidence: 99%

Local Electrochemical Studies and Surface Analysis on Worn Surfaces

Krawiec

Vignal

Heintz

et al. 2008

J. Electrochem. Soc.

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“…Since the pioneer work of Iverson [45], who has reported a relation between the frequency or amplitude of the electrochemical noise and the inhibiting power of the environment for a number of metals and alloys (e.g., aluminum alloys, magnesium, mild steel, etc. ), there has been a growing interest toward the measurement of electrochemical noise and its peculiar relationship with localized corrosion [11,12,31,32,41,[46][47][48][49][50][51]. In this respect, electrochemical noise measurements obtained from the analysis of corrosion potential or current fluctuations provide a new approach to the study of corrosion processes in reactive environments such as aqueous media or hot aggressive gases or even under the effect of mechanical stimuli, e.g., tribocorrosion.…”

Section: Corrosion Rate Determination By Electrochemical Noise Analysmentioning

confidence: 99%

“…While multiple case studies on electrochemical noise have been regularly reported in recent years, even greater progress is possible, with the scope for increased breakthrough in science and technology (e.g., novel materials, precision tools on macro-to-nanoscopic scales, availability and intelligent use of these materials and tools, and so on). In particular, the main focus of these investigations is to promptly obtain in situ mechanistic information on the repassivation and breakdown of passive films and to monitor any process associated with confined corrosion and/or tribo-or bio-tribocorrosion [46,47,51]. It has been, indeed, suggested that the noise is caused by film breakdown and repassivation processes, and given the dynamic competition between these two processes, pitting will initiate.…”

Section: Corrosion Rate Determination By Electrochemical Noise Analysmentioning

confidence: 99%

Electrochemical Techniques for Corrosion and Tribocorrosion Monitoring: Methods for the Assessment of Corrosion Rates

Berradja¹

2019

Corrosion Inhibitors

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The corrosion mechanism taking place in an aqueous phase with or without mechanical contact is electrochemical in nature. The electrochemical signal is one of the primary sources of information that relates to behavior in potential, current, and electrical charge of a corroding electrode. It arises from processes that cause corrosion and other electrochemical reactions. In a sliding contact in an ionic electrolyte medium, electrochemistry is more likely to interfere with the tribological behavior of tribocorrosion systems. In recent years, attempts by researchers have been made to control the material loss by electrochemical methods for various engineering systems. Applied online for monitoring in-situ uniform, localized, galvanic, or more forms of corrosion, such techniques are very convenient means to measure corrosion rate of materials. Such methods can also be used in different ways to evaluate their ability to protect materials (as inhibitors, protective layers, coatings). In this chapter, theoretical and experimental applications, fundamental aspects, limits of the electrochemical techniques for corrosion, and tribocorrosion monitoring are presented. Standards developed, so far, by various standardization organizations are reported. Fundamentals of traditional and advanced corrosion methods are described, focusing on their advantages, i.e. sensitivity to low corrosion rates, short experimental duration, and well-established theoretical understanding.

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“…Tribocorrosion, defined as the conjoint action of tribological wear (mechanical damage) and corrosion (electrochemical dissolution), is a frequently encountered cause of the passive film breakdown [10,11]. Over the past two decades, various tribo-electrochemical methods have been successfully applied to elucidate how mechanical abrasion or erosion accelerate corrosion of passive stainless steels [12][13][14][15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%