Effect of sulphate on the corrosion behavior of bronze under a chloride‐containing thin electrolyte layer

Abstract

The effect of sulphate on the corrosion behavior of bronze under a chloridecontaining thin electrolyte layer (TEL) during wet-dry cycles has been studied by means of in situ electrochemical techniques and ex situ physical characterization. In the initial stage, corrosion rates of bronze under a chloride-containing TEL decrease in the presence of sulphate, due to the fact that pit corrosion is inhibited by the sulphate. After long-term exposure, however, corrosion rates are accelerated by sulphate addition, implying a synergistic effect between these components. This synergistic effect is ascribed to inhibition of the formation of protective Pb-containing products by sulphate. K E Y W O R D S atmospheric corrosion, bronze, EIS, synergistic effect 1412 |

Mechanism of incipient annular corrosion of high-tin bronze in simulated soil solution

“…Sufficient corrosion samples were obtained via long-time polarisation, and the components of corrosion samples were evaluated via XRD under constant potential polarisation conditions. As shown in Figure 8, the 200 mV potentiostatic polarised corrosion product was reddish-brown, and the XRD test findings showed that the primary components were Cu 2 O and a small amount of CuCl [25]. The 1200 mV potentiostatic polarised corrosion product had various colours from mixed to brown-black, and a small amount of the sample gradually turned dark-green when placed in air.…”