The corrosion behavior of Ni-Cu gradient layer on the nickel aluminum-bronze (NAB) alloy
The corrosion behavior of Ni-Cu gradient layer on the nickel aluminum-bronze (NAB) alloy
复制标题
Ni-Cu梯度层对镍铝青铜(NAB)合金的腐蚀行为
DOI：
10.1016/j.corsci.2018.03.050
复制
发表时间：
2018-07-01
影响因子：
8.3
通讯作者：
Hu, Wenbin
中科院分区：
文献类型：
--
作者：
Luo, Qin;Qin, Zhenbo;Hu, Wenbin
采用热扩散工艺在镍铝青铜合金表面获得了Ni-Cu梯度渗层。由于形成了由Ni（OH）（2）和Cu 2 O组成的保护膜，提高了耐蚀性。Ni-Cu镀层在浸泡过程中表现为均匀腐蚀和点蚀并存的局部腐蚀，但由于Ni和Cu的梯度分布，抑制了点蚀的发展。点蚀过程中钝化层与裸Ni-Cu之间的电偶腐蚀驱动力主要是由界面电位降降低引起的。
The gradient Ni-Cu layer on nickel aluminum-bronze alloy was obtained by the thermal diffusion process. The corrosion resistance was improved due to the formation of protective film, consisted of Ni(OH)(2) and Cu2O. Although the Ni-Cu layer exhibited local corrosion with uniform corrosion and pitting corrosion simultaneously during the immersion test, the pitting growth was depressed because of the gradient distribution of Ni and Cu. The relieving driving force for galvanic corrosion between outer passive layer and bare Ni-Cu in the pitting was the main factor, which was caused by the decreasing interface potential drop.