摘要
The corrosion behavior of formic acid towards bronze under thin electrolyte layer(TEL)was investigated by means of electrochemical measurement.Bare bronze had smaller self-corrosion current density than Cu_(2)O patina bronze and CuCl patina bronze,while it had higher polarization resistance.The corrosion behavior of bronze materials had differences in various TELs and bulk solutions.The critical thickness of TEL for Bare Bronze was 200μm,which normly occurred in the transformation from anode control to cathode control.The thickness of TEL had a negligible effect on the corrosion rate of Cu_(2)O patina bronze when it was greater than 150μm.For CuCl patina bronze,the corrosion process accelerated with thinner TEL.SEM was used to analyze the morphology and composition of corrosion products.Cu_(2)O,Cu(OH)(HCOO)and Cu(HCOO)_(2)were formed on the surface of Bare Bronze and Cu_(2)O patina bronze,nevertheless,the main corrosion product of CuCl patina bronze was Cu_(2)Cl(OH)_(3).
基金
the National Natural Science Foundation of China(No.51671117)
the National Key Research and Development Program(No.2018YFC1901000)。
