锡
腐蚀
钝化
铜
冶金
材料科学
青铜色
扩散
图层(电子)
复合材料
热力学
物理
作者
Johanna Müller,Barbara Laïk,Ivan Guillot
标识
DOI:10.1016/j.corsci.2013.07.025
摘要
Corrosion of synthetic CuSn bronzes was electrochemically investigated on rotating disc electrode (RDE) in a buffered medium (pH = 6.8, deaerated 10-2 mol L−1 Na2SO4 solution). Copper species diffusion coefficients through the patina for various tin-content bonzes were analyzed and provided information about its organization. A joined mass-transport and electronic transfer process controls the corrosion. A faster and more efficient passivation was observed with highest bronze tin-content. Also, copper species diffusion through the layer is independent of the tin content and few 10−10 cm2 s−1. Such an order of magnitude indicates that corrosion products layer behaves like a gel.
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