脉冲电沉积纳米晶体镍腐蚀特性的研究

Corrosion Characteristic of Nanocrystalline Nickel Prepared by Pulse Electrodeposition

摘要:

采用脉冲电沉积工艺制备纳米晶体镍和普通微晶镍，用浸泡法和电化学极化法研究了电解镍板、普通微晶镍和纳米晶体镍在3．5％NaCl溶液及10％HCl溶液中的腐蚀行为。结果表明，在NaCl溶液中，这3种晶体镍的耐蚀性能均较好，但纳米晶体镍中的晶界体积分数增加，最容易被腐蚀。在HCl溶液中，这3种镍仍具有较好的耐蚀性，但纳米晶体镍耐腐蚀能力最低。

Abstract:

Nanocrystalline nickel and micro-grained nickel was prepared by pulse electrodeposition, and the corrosion behavior of electrolytic nickel, coarsed-grained nickel and nanocrystalline nickel in 3.5%NaCl solution and 10%HCl solution was studied by soak method and electrochemical polarization method, respectively. Three nickel samples all exhibited well corrosion resistance in 3.5%NaCl solution, however, nanocrystalline nickel was easier to be corroded due to the increase of fraction of interface volum. In 10%HCl solution they also showed good corrosion resistance, the nanocrystalline Ni presented the weakest corrosion resistance among the three nickel samples.