图书来源:二元合金相图及中间相晶体结构 二元合金相图及中间相晶体结构
作 者:唐仁政 田荣璋
出版时间:2009-05
定 价:320元
图书ISBN:978-7-81105-831-4
出版单位:中南大学出版社
Dangguo LI,Darong CHEN*,Jiadao WANG and Haosheng CHEN State Key Laboratory of Tribology,Tsinghua University,Beijing 100084,China
摘 要:The chemical composition and semi-conductive properties of passive film on nickelbased alloy (G3 alloy) in bicarbonate/carbonate buffer solution were investigated by Auger electron spectroscopy (AES),X-ray photoelectron spectroscopy (XPS),electrochemical impedance spectra (EIS) and Mott-Schottky plot.AES and XPS results showed that the passive film appeared double-layer structure,in which the inner film was composed of nickel oxide,the mixed nickel-chromium-molybdenum-manganese oxides were the major component of the outer film.The electrochemical results revealed that the factors including frequency,potential,time,temperature and pH value can affect the semi-conductive property,the doping densities decreased with increasing potential and pH value,prolonging time and decreasing temperature.According to the above results,it can be concluded that the film protection on the substrate was enhanced with increasing potential and pH value,prolonging time and decreasing temperature.
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