Abstract
The influence of temperature on pitting corrosion of copper in borate—boric acid buffer (ph 9.00) + x M sodium chloride (0.0 < x < 0.5) is studied in the 0–50°C range, through the change in the breakdown potential determined at a low sweep rate and the passivity current measured at a constant potential. As the temperature rises, the breakdown potential decreases in the 0–15°C range and increases in the 25–50°C range. These results are explained in terms of opposite effects caused by temperature rise, namely the increase in the rate of reactions involved in passivity breakdown and the increase in the protective characteristics of the passive layer.
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