Tribocorrosion of stellite 6 in sulphuric acid medium: electrochemical behaviour and wear

Benea, Lidia; Ponthiaux, Pierre; Wenger, F.; Galland, J.; Hertz, D.; Malo, Jean-Yves

doi:10.1016/j.wear.2003.06.003

Cited by 56 publications

(21 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…A galvanic connection between worn and unworn parts on the disc surface is possible [23,25,26]. Consequently, the open circuit potential depends on the following parameters: The evolution of the open circuit potential is shown in Fig.…”

Section: Open Circuit Potential Measurementsmentioning

confidence: 99%

Electrodeposition and tribocorrosion behaviour of ZrO2–Ni composite coatings

Benea

2009

J Appl Electrochem

View full text Add to dashboard Cite

With the objective of producing new functional surfaces with enhanced tribo-corrosion properties we have investigated the electrochemical codeposition of composites in which an electrodeposited metal (nickel) is the matrix and a transition metal oxide (ZrO 2 ) is the dispersed phase. This paper describes the effect of ZrO 2 dispersed particle codeposition on nickel electrocrystallisation steps as well as the tribocorrosion behaviour of the composite coatings obtained. This system was selected because nickel is an industrially important coating material on steel and other support materials. The cathodic polarization curves have been plotted both in the presence and absence of the insoluble dispersed phase. Electrochemical impedance spectroscopy was used to obtain additional information on the early steps of nickel and nickel matrix composite electrodeposition. Impedance data were acquired with a Solartron type electrochemical interface and frequency response analyzer. A schematic codeposition mechanism is proposed. The influence of zirconium oxide on the nickel electrodeposition steps is discussed. The tribocorrosion properties of ZrO 2 -Ni composite coatings (100 lm thickness) have been studied in 0.5 M K 2 SO 4 solution on a pin on disc tribo-corrosimeter connected to an electrochemical cell. The normal force applied was 10 N at a rotation speed of 120 rpm. The counterbody (pin) was a corrundum cylinder (7 mm in diameter), mounted vertically on a rotating head, above the specimen. The lower spherical end (radius = 100 mm) of the pin was then applied against the composite surface (disc).

show abstract

Section: Open Circuit Potential Measurementsmentioning

confidence: 99%

Electrodeposition and tribocorrosion behaviour of ZrO2–Ni composite coatings

Benea

2009

J Appl Electrochem

View full text Add to dashboard Cite

show abstract

“…For this reason, a considerable amount of research was devoted in the past to the understanding of stellite tribocorrosion. Main attention was set on biomedical applications [7][8][9], and only a few on nuclear industry applications concerning stellite 6 [7,10].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Simulation of the Current and Potential Response in Sliding Tribocorrosion

Papageorgiou

Mischler

2012

Tribol Lett

View full text Add to dashboard Cite

Valuable insights into the wear-corrosion behavior of metals, as well as into the tribocorrosion field through the development of simulation models of tribocorrosion experiments, can contribute in rationalizing wearaccelerated experiments and their open circuit potential (OCP) behavior under rubbing. These results demonstrate that mathematical models of controlled tribo-electrochemical contacts can complement the physical experiment and add valuable understanding to the tribological behavior of metals, alloys, and generally to materials in an electrochemically active environment. The excellent agreement of experimental wear data and the experimental OCP curves with the OCP simulations with time establishes the concepts underlying the galvanic coupling model as a valid methodological approach toward a quantitative description and mechanistic understanding of the tribo-electrochemical experiment. Besides analyzing stellite tribocorrosion, application of the model to Al alloy data has helped us quantify the relative contributions of chemical and mechanical wear and reveal the underlying synergy. Ti metal tribocorrosion under variable load has revealed that the contact pressure P av , can reach much lower values within the experimental time domain and finally be the cause of interruption of the initial wear mechanism.

show abstract

“…The final aspect would be due to both the superposition of a large number of rotations and of an active dissolution of the nearby metal sustained by ohmic drop [10,11]. Repassivation by galvanic coupling to the surrounding passive area, not detected in the measured current, well-known in the case of local depassivation experiments [12] must be also considered.…”

Section: Discussionmentioning

confidence: 99%

Tribo-electrochemical impedance: A new technique for mechanistic study in tribocorrosion

Keddam¹,

Ponthiaux²,

Vivier³

2014

Electrochimica Acta

View full text Add to dashboard Cite

On the basis of a classical model of triboelectrochemistry, a new approach is proposed based on an impedance ratio of a mechanical perturbation and of an electrochemical response. Theoretical derivation, experimental setup and application to a passive stainless steel in a borate solution are presented. Transient characteristics yielded by the technique, associated to a permanent tribological regime, are found to obey a two-time-constant law. They are discussed and compared to the global repassivation transients of the material after switching off the abrasive friction.

show abstract

Tribocorrosion of stellite 6 in sulphuric acid medium: electrochemical behaviour and wear

Cited by 56 publications

References 2 publications

Electrodeposition and tribocorrosion behaviour of ZrO2–Ni composite coatings

Electrodeposition and tribocorrosion behaviour of ZrO2–Ni composite coatings

Electrochemical Simulation of the Current and Potential Response in Sliding Tribocorrosion

Tribo-electrochemical impedance: A new technique for mechanistic study in tribocorrosion

Contact Info

Product

Resources

About