The electrochemical and mechanical behavior of passivated and TiN/AlN-coated CoCrMo and Ti6Al4V alloys

Goldberg, Jay R.; Gilbert, Jeremy L.

doi:10.1016/s0142-9612(03)00606-9

Cited by 120 publications

(66 citation statements)

References 17 publications

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“…Goldberg and Gilbert showed that at a given applied load, the mean peak current was higher for Ti-6Al-4V than for CoCrMo. 9 This result was attributed to the longer time constant for repassivation for Ti-6Al-4V (1.5 ms) compared to CoCrMo (0.5 ms). The higher susceptibility of Ti-6Al-4V to oxide film fracture could explain the greater measured differences, suggesting that material combination is important to the fretting corrosion of modular junctions.…”

Section: Discussionmentioning

confidence: 99%

“…3 and 5) was on the order of 0.5 to 1.0 mA, consistent with the noise level during scratch testing of Ti-6Al-4V and CoCrMo alloys. 9 This noise may have been due to the relatively large surface area of the male taper left exposed to the test solution. Further work is necessary to improve the detection of fretting current at low cyclic loads.…”

Section: Discussionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8][9][10][11][12] Initially, corrosion was thought to result from a galvanic process due to the coupling of Ti-6Al-4V alloy with CoCrMo alloy. 2 This hypothesis was rejected by the finding of comparable corrosion products in similar alloy (CoCrMo/CoCrMo) couples.…”

Section: Introductionmentioning

confidence: 99%

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Effect of impact assembly on the fretting corrosion of modular hip tapers

Mroczkowski¹,

Hertzler²,

Humphrey³

et al. 2005

Journal Orthopaedic Research

112

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The goal of this study was to determine the effect of assembly load and local assembly environmental conditions on the fretting corrosion of modular femoral stem tapers. Femoral head/ taper assemblies in both similar (CoCrMo/CoCrMo) and mixed (CoCrMo/Ti-6Al-4V) alloy combinations were evaluated using an electrochemical test method. Specimens were assembled under impact loading and by hand, in both wet and dry conditions. Incremental cyclic loads ranging from 89 to 5,340 N were applied at a frequency of 3 Hz in Ringer's solution at ambient temperature. During the test, both the open circuit potential (OCP) and fretting current (i fret ) were measured using a saturated calomel electrode (SCE) and counter electrode, respectively. The results were comparable for both mixed and similar alloy couples. Decreases in OCP and increases in i fret (indicators of oxide film fracture and repassivation) were seen with increasing load magnitude, often occurring at loads well below those expected clinically. OCP at the 5,340 N cyclic load ranged from À30.4 to À103.7 mV versus SCE for similar alloy couples, and À19.1 to À181.4 mV versus SCE for mixed alloy couples. Mean peak fretting currents ranged from 0.84 to 1.42 mA and 1.06 to 3.12 mA for similar and mixed alloy couples, respectively. The larger current magnitudes and more negative shifts in OCP for mixed alloy couples indicate the difference in oxide film fracture behavior between titanium and cobalt alloys. The load at which OCP began to drop (onset of fretting) was dependent upon the assembly conditions for both material couples. Specimens assembled with impact loads in air showed the highest resistance to fretting. The results of this study indicate that the assembly load and the environment both play a role in the initial stability of modular hip taper connections.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Effect of impact assembly on the fretting corrosion of modular hip tapers

Mroczkowski¹,

Hertzler²,

Humphrey³

et al. 2005

Journal Orthopaedic Research

112

View full text Add to dashboard Cite

show abstract

“…Since the long-term durability of the prosthetic joint materials rely on the successful control of both the corrosion that produces ions release and the tribocorrosion resistance that produces ions release and oxide or plastic debris, Physical Vapor Deposition (PVD) multilayer coatings offer a multifunctional protection alternative and good adherence to metallic substrates in comparison to the monolayer coating [15,[21][22][23][24][25][26]. The multilayer combine the properties of different materials in a single protective layer.…”

Section: Introductionmentioning

confidence: 99%

“…There are also only a few publications regarding the tribocorrosion behavior of multilayer coatings [25,34,35] and fewer studies yet of the tribological behavior of TiAlCN/TiAlN and nanocomposite (nc) TiAlV(N,C)/amorphous C multilayer [36]. …”

Section: Introductionmentioning

confidence: 99%