The evaluation of tribo-corrosion synergy for WC–Co hardmetals in low stress abrasion

Gant, A.J.; Gee, M.G.; May, A.T.

doi:10.1016/j.wear.2003.04.001

Cited by 81 publications

(38 citation statements)

References 21 publications

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“…Recently, the standard ASTM G65 rig has been modified to allow for tribocorrosion testing using abrasive slurries [60]. Since this set-up does not have the provision for electrochemical testing, weight or volume loss must be measured to assess the abrasioncorrosion damage.…”

Section: Short Review Of Abrasion-corrosion Experimental Set-upsmentioning

confidence: 99%

New Experimental Rig to Investigate Abrasive–Corrosive Characteristics of Metals in Aqueous Media

Salasi

Stachowiak

2010

Tribol Lett

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A new tribometer to investigate a conjoint effect of three-body abrasion and corrosion has been developed. In this design, a flat wear sample is loaded against a rotating cylindrical disc counterface and the abrasive slurry is delivered to the contact interface. Capabilities of the newly developed tribometer have been assessed through conducting abrasion-corrosion tests involving simultaneous electrochemical measurements. In this work, the stability of the passive layer on stainless steel under three-body abrasive wear in a near neutral electrolyte was investigated using potentiodynamic polarization tests. 316L Stainless Steel wear samples were abraded by coarse garnet particles in an aerated sodium sulphate electrolyte. The effects of load and speed on the polarization curves and passivity of 316L steel were determined. It was found that under abrasion-corrosion conditions 316L steel became more thermodynamically active and the passive corrosion rate has increased. Increasing the contact load resulted in a small increase in the passive corrosion current, while increasing the rotating speed had the opposite effect of decreasing the current. Linear polarization resistance method was used to analyse corrosion current changes with time during abrasion-corrosion testing. The existence of three distinct stages was explained by the third-body effect on the corrosion potential and current. First stage was revealed by continuous decrease of corrosion potential. Then, the potential reached a plateau for the second and third stages. In the first and second stages, particle constraint in the contact zone plays the major role and a linear rise in corrosion current with time has been recorded. After a certain amount of surface roughening, no further increase in particles entrapment is expected. Therefore, in the third stage steady-state corrosion current values are anticipated. The rig developed can also be used to simulate two-body abrasion-corrosion. The capabilities of the new rig have been compared against other experimental set-ups used in studies of combined abrasion-corrosion behaviour.

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Section: Short Review Of Abrasion-corrosion Experimental Set-upsmentioning

confidence: 99%

New Experimental Rig to Investigate Abrasive–Corrosive Characteristics of Metals in Aqueous Media

Salasi

Stachowiak

2010

Tribol Lett

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“…Celis et al [26] caution against simple analysis of monitoring the surface open circuit potential (OCP) during tribo-corrosion tests as this analysis requires in-depth understanding of the mechanical, chemical Tribo-corrosion mechanism regime map. Data points used are taken from [42,43,65,66]. and electrochemical effects on OCP.…”

Section: Wear-corrosion Interactionsmentioning

confidence: 99%

Tribo-corrosion of coatings: a review

Wood¹

2007

J. Phys. D: Appl. Phys.

225

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This paper reviews the available literature relating to the emerging research into the performance of coatings under combined wear and corrosion conditions. Understanding how coatings perform under these tribo-corrosion conditions is essential if the service life of equipment is to be predicted and to allow service life to be extended. Therefore, the tribo-corrosion performance of coatings deposited by a variety of techniques is discussed and the main mechanisms associated with their degradation under combined wear and corrosion highlighted. Coating composition, microstructure, defect level, adhesion, cohesion and substrate properties are seen as some of the critical elements in coating performance when subjected to tribo-corrosion contacts. The importance of post-coating deposition treatments such as laser resurfacing and sealing are also discussed. Interactions between wear and corrosion mechanisms are identified along with some models and mapping techniques that aim to inform coating selection and predict performance. Recent investigations into mono-layer as well as multilayered and functionally graded coatings are reviewed as candidates for wear-corrosion resistant surfaces. The review reveals the need for a more considered approach to tribo-corrosion testing and the way in which the results are analysed and presented. For example, the test conditions should be appropriate to the coating system under test; the level of in situ instrumentation deployed and the post-test analysis of in situ electrochemical data should be carefully selected as well as details given of the composition of any surface tribofilms formed and the identification of the degradation mechanisms.

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“…C is k determined from electrochemical tests (Section 3.3). Gant et al [32] have attempted to evaluate synergy of some hard metals using Eq. (6) and but have not considered Eq.…”

Section: Synergistic Effectmentioning

confidence: 99%

Synergistic effects of micro-abrasion–corrosion of UNS S30403, S31603 and S32760 stainless steels

Bello

Wood

Wharton

2007

Wear

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In this study, the synergistic effects of abrasion and corrosion on UNS S30403, S31603 and S32760 stainless steels have been investigated using a micro-abrasion test rig. The stainless steel samples have been studied under both pure abrasion (PA) and abrasion-corrosion (AC) conditions simulated by using silicon carbide based slurries in either distilled water or 3.5% sodium chloride solutions. Tests have been conducted at various abrasive concentrations (0.006-0.238 g/cm 3 ) and at 38 and 180 m sliding distance to enable the interactions between abrasion and corrosion to be better understood. Wear mode identification and regime mapping was used to establish the dominant wear mechanism at the different slurry concentrations. The synergistic effect has been quantified and related to the material composition and the grooving or rolling abrasive wear mechanisms present. The synergistic levels were typically positive and have been discussed in terms of their dependence on the integrity of the passive films and the repassivation kinetics. The three-body abrasion-corrosion rates for all steels were found to be 14 times higher than two-body abrasion-corrosion rates. S30403 shows weak repassivation performance with electrochemical activity being proportional to mechanical activity. S31603 showed a constant electrochemical activity over a variety of mechanical conditions, indicating a stronger repassivation performance than S30403. S32760 has the best repassivation performance with negative synergistic characteristics until abrasion rate are such that depassivation occurs and the electrochemical activity is then comparable to the other steels.

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The evaluation of tribo-corrosion synergy for WC–Co hardmetals in low stress abrasion

Cited by 81 publications

References 21 publications

New Experimental Rig to Investigate Abrasive–Corrosive Characteristics of Metals in Aqueous Media

New Experimental Rig to Investigate Abrasive–Corrosive Characteristics of Metals in Aqueous Media

Tribo-corrosion of coatings: a review

Synergistic effects of micro-abrasion–corrosion of UNS S30403, S31603 and S32760 stainless steels

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