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The effect of fibrinogen on the electrochemical behavior of CoCrNiMo and CoCrNiW was studied in PBS solution with electrochemical method. The results showed that cobalt alloys, with extensive passive potential region and small hysteresis loop, exhibited excellent resistance to pitting corrosion. According to the analysis of energy-dispersive X-ray (EDX), the passive oxide film formed on the surface of the alloy. When fibrinogen was added into the solution, it absorbed on the surface and formed complex, and its electrochemical transference destroyed the passive oxide film and increased the passive current density of alloys. In a word, fibrinogen enhanced the aggressiveness of solution and accelerated the corrosion of alloys. The fibrinogen adsorption amount measured by UV ray absorption method are respectively 10.628 μg/cm2 on CoCrNiMo and 9.561 μg/cm2 on CoCrNiW.
The effect of fibrinogen on the electrochemical behavior of CoCrNiMo and CoCrNiW was studied in PBS solution with electrochemical method. The results showed that cobalt alloys, with extensive passive potential region and small hysteresis loop, exemplified excellent resistance to pitting corrosion. According to the analysis of energy-dispersive X-ray (EDX), the passive oxide film formed on the surface of the alloy. When fibrinogen was added into the solution, it absorbed on the surface and formed complex, and its electrochemical transference destroyed the passive oxide film and increased The passive current density of alloys. In a word, fibrinogen enhanced the aggressiveness of solution and accelerated the corrosion of alloys. The fibrinogen adsorption amount measured by UV ray absorption method was respectively 10.628 μg / cm 2 on CoCrNiMo and 9.561 μg / cm 2 on CoCrNiW.