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96345 AN EIS STUDY OF THE CORROSIVE BEHAVIOR OF PROPELLANT HYDRAZINE

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Product Number: 51300-96345-SG
ISBN: 96345 1996 CP
Author: D. L Baker, R. C. Bhardwaj, D. D. Davis
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Corrosion behavior of iron (Fe), nickel (Ni), cobalt (Co) and titanium (Ti) alloys in hydrazine (N2H4) and CO2-contaminated N2H4 were studied using Electrclchemical Impedance Spectroscopy (EIS). The corrosion rate of Fe and Ti alloys increased in hydrazine and CO2-contaminated hydrazine as a function of time and CO2 concentration; however, the corrosion rate of Ni and Co Ialloy decreased as a function of time in contaminated hydrazine. The corrosion rate of Ni and Co alloys were significantly higher when compared with corrosion rates of Fe and Ti alloys in CO2-contaminated hydrazine. The effects of CO2 concentration on corrosion rate has been explained in terms of alloy composition and the role of CO2 in forming carbazic acid and its metal complexes. The polarization values obtained from EIS studies were used to calculate the exchange current density and decomposition rate of hydrazine. Keywords: electrochemical impedance spectroscopy, ccrrosion rate, CO2-contaminated hydrazine, decomposition rate
Corrosion behavior of iron (Fe), nickel (Ni), cobalt (Co) and titanium (Ti) alloys in hydrazine (N2H4) and CO2-contaminated N2H4 were studied using Electrclchemical Impedance Spectroscopy (EIS). The corrosion rate of Fe and Ti alloys increased in hydrazine and CO2-contaminated hydrazine as a function of time and CO2 concentration; however, the corrosion rate of Ni and Co Ialloy decreased as a function of time in contaminated hydrazine. The corrosion rate of Ni and Co alloys were significantly higher when compared with corrosion rates of Fe and Ti alloys in CO2-contaminated hydrazine. The effects of CO2 concentration on corrosion rate has been explained in terms of alloy composition and the role of CO2 in forming carbazic acid and its metal complexes. The polarization values obtained from EIS studies were used to calculate the exchange current density and decomposition rate of hydrazine. Keywords: electrochemical impedance spectroscopy, ccrrosion rate, CO2-contaminated hydrazine, decomposition rate
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