Corrosion resistance of ternary NiP based alloys in sulfuric acid solutions
Corrosion resistance of ternary NiP based alloys in sulfuric acid solutions
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DOI：
10.1016/s0013-4686(02)00198-6
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发表时间：
2002-07
影响因子：
6.6
通讯作者：
Guojin Lu;G. Zangari
中科院分区：
文献类型：
--
作者：
Guojin Lu;G. Zangari
采用自催化沉积法制备了NiP基合金薄膜，研究了薄膜的结构、化学性质及其在硫酸溶液中的腐蚀行为。制备的ni基合金呈纳米晶状，晶粒尺寸随P含量的增加而减小。添加第三种元素（W或Mo）会影响观察到的晶粒尺寸。在低阳极过电位Ni下，P基合金的交换电流和反应性均低于Ni，且随P含量的增加而提高。然而，与Ni相反，NiP基合金在较高的阳极过电位下不会钝化。在NiP合金中添加W可以提高其耐腐蚀性能，而添加Mo对其腐蚀性能几乎没有影响。
NiP based alloy films were prepared by autocatalytic deposition and their structure, chemistry and corrosion behaviors in sulfuric acid solutions were studied as a function of their composition. The as-prepared Ni-based alloys are nanocrystalline, and their grain size decreases with increasing P content. Addition of a third element (W or Mo) influences the observed grain size. At low anodic overpotential NiP based alloys present a lower exchange current and lower reactivity than Ni, both improving with increasing P content. Contrary to Ni however, the NiP based alloys do not passivate at higher anodic overpotentials. Addition of W to NiP alloys can improve their corrosion resistance, while addition of Mo has little or no beneficial effects on corrosion properties.