Fretting corrosion in saline and serum

Abstract

Fretting corrosion of stainless-steel round hole plates and spherical head screws was studied using a simulator that produced a rocking motion of the heads in the plate holes. Experiments were run for 7 days, with the simulator producing 1 oscillation/s for 16 h/day. Fretting corrosion was studied in 0.9% NaCl and in a 10% solution of fetal calf serum in saline. The results showed a tenfold decrease in fretting corrosion when the serum was added to the saline. Measurements of the weight of the two screws and two-hole plate showed those in saline lost 2.9 mg as compared to 0.3 for those in 10% serum. The concentration of nickel in the saline solutions was 12.4 micrograms/mL compared with 0.85 in serum. Visual examination of the solutions and implants revealed that those in saline had a significant amount of corrosion products while those tested in 10% serum were bright and shiny. Recordings of electrical potentials demonstrated that the addition of serum to saline significantly reduced the change in potential from rest to fretting condition.

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

“…[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.…”

“…10 Other variables include local environmental conditions, such as pH and the presence of proteins in the modular junction. 1,11,12 Crevice, galvanic, and fretting corrosion are all possible in modular junctions. Components that mate using a Morse type locking taper can have tolerance mismatches, resulting in small crevices into which fluid can ingress.…”

Retrieval study of stainless steel and titanium miniplates and screws used in maxillofacial surgery

“…Titanium has an electric modulus, i.e. stiffness, about half that of stainless steel [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Consequently, the titanium plates most likely require less manipulation during insertion.…”

“…Although mechanical defects were present at the free surface, repassivation mechanisms were obviously able to prevent breakdown [2,9]. However, corrosion of multicomponent devices may occur in the biological environment despite a good corrosion resistance [3,6,7,9,12,111. The crevices created between the different components were the only site for corrosional attack observed in the present Unstable conditions in the fracture area after osteosynthesis lead to continuous fretting at the screwlplate interface.…”

New Solubility Test by Sliding on Ag-Pd-Cu-Au Alloys with Different Cu Contents into Different Solutions with or Without Mucin

“…Therefore, different solutions can be expected to engender different corrosion behaviors of Ag-Pd-Cu-Au alloy. Moreover, some interesting reports have described that amounts of released metal ions increased [12,13] or decreased [14,15] or remained unchanged [16] using the eluted solutions, including amino acid or proteins, for which the behavior of released ions depended on the heat treatment of alloys [10].…”