人工海水冲刷时间对B10管电化学性能影响的研究?

Effects of erosion time on the electrochemical performance of B10 pipe in artificial seawater

摘要:

利用自行设计的循环冲刷试验机,以人工配置海水为介质,对B10铜镍合金管材Φ57×2.5 mm进行冲刷腐蚀试验.结果表明,随冲刷时间延长,开路电位正移,在冲刷192 h时达到0.08 V；腐蚀电流密度降低,腐蚀电位升高,在192 h时分别为9.060×10-6 A·cm-2和0.039 V；阻抗谱高频区和低频区的容抗弧半径增大,电荷转移电阻和膜层电阻分别达到1764Ω·cm2和232.1Ω·cm2.说明在海水的冲刷过程中,B10铜镍合金管的耐蚀性增强.

Abstract:

Using self-designed circulation scouring machine,with water as a medium,manual configuration of B10 copper nickel alloy tubeΦ57×2.5 mm erosion experiment was carried out.The results show that with the increase of scouring time,open circuit potential is moved upward,in flushing 192 h is 0.08 V. Reduce the corrosion current density and corrosion potential rise,at the time of 192 h were 9.060×10-6 A·cm-2 and 0.039 V.Impedance spectrum of high frequency area and frequency area capacitive reactance arc radius increases,the charge transfer resistance and membrane layer resistance,1764 Ω· cm2 and 232.1 Ω·cm2 ,respectively.That is to say,in the process of seawater erosion,B10 copper corrosion resistance of nickel alloy tube does not drop.