A study of the atmospheric copper corrosion during a wet/dry cyclic condition has been carried out in oxalic acid (C2H2O4) solution. The corrosion mass losses of copper were monitored continuously in oxalic acid solution using an alternating current (AC) impedance technique. Dependence of atmospheric corrosion mass loss of copper on temperature, relative humidity, surface orientation, and lengths of drying period has been investigated. The results showed that the corrision mass loss of copper increased with the rise of temperature as well as relative humidity. A long drying time is favorable for the formation of cracks and defects within the corrosion products, which enhances the corrosion mass loss. Orientation of the copper surface in the downward parallel construction decreases the corrosion rate more than that observed for the upward oriented direction due to the removal of the corrosion stimulators. A mechanism for copper corrosion experienced during wet/dry cyclic conditions is suggested.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Materials Science(all)