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几种阴离子对A3钢在NaHCO3+NaCl溶液中亚稳态孔蚀行为的影响

, PP. 307-310

Keywords: 碳钢,阴离子,孔蚀,NaHCO3溶液

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Abstract:

用动电位极化法研究了CO2-3、NO-2、SO2-4、MoO2-4和PO3-45种阴离子对A3钢在0.5mol/LNaHCO3+0.05mol/LNaCl溶液中的亚稳态孔蚀行为.5种离子使A3钢的孔蚀电位Eb和亚稳孔蚀出现电位Em均不同程度地正移,说明这5种离子既抑制稳定孔蚀的发生,也抑制亚稳孔蚀的发生.在5种离子中,NO-2抑制亚稳孔蚀形核的能力最强.5种离子对稳定孔蚀与亚稳孔蚀形核与生长有大致相同的作用.

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