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首页> 外文期刊>Corrosion Engineering, Science and Technology >Preparation and electrochemical corrosion behaviour of 3D large-sized nanocrystalline copper bulk in solutions with chloride ions
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Preparation and electrochemical corrosion behaviour of 3D large-sized nanocrystalline copper bulk in solutions with chloride ions

机译：用氯离子溶液3D大型纳米晶铜批量的制备及电化学腐蚀行为

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A 3D large-sized nanocrystalline (NC) copper bulk was prepared by inert gas condensation and in situ warm compress, the density of which was 99.51% of theoretical value. Electrochemical methods and XRD,EDS,SEM technique were used to investigate the anodic polarisation behaviour of NC copper in solutions with chloride ions. NC copper exhibited a different anodic polarisation behaviour from its coarse-grain (CG) counterpart in 0.47 wt-% NaCl solution. No second passivity was observed for NC copper, while there was a notable second passivity for CG copper. Compared with CG copper, the corrosion resistance of NC copper decreased. The anodic polarisation behaviour of NC copper changed significantly when 10(4) ppm Cl- was added in 0.3% Na2SO4 solution. Attributed to the CuCl protective film on NC copper, the critical current intensity decreased and the decreasing rate of anodic current intensity lowed notably in activity-passivity zone.
机译：通过惰性气体冷凝制备3D大尺寸纳米晶（NC）铜块，原位温热，其密度为理论值的99.51％。 电化学方法和XRD，EDS，SEM技术用于研究NC铜在氯化物离子中NC铜的阳极偏振行为。 NC铜从其粗粒（CG）对应于0.47wt％NaCl溶液中的不同阳极偏振行为。 对于NC铜，没有观察到第二个被动，而CG铜存在值得注意的第二个被动性。 与Cg铜相比，NC铜的耐腐蚀性降低。 当在0.3％Na 2 SO 4溶液中加入10（4）ppm Cl-时，Nc铜的阳极偏振行为显着变化。 归因于NC铜上的CuCl保护膜，临界电流强度降低，并且阳极电流强度的降低率显着降低在活动 - 被动区中。

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