椭圆偏振法研究镍表面的钝化膜

中国腐蚀与防护学报

1990, Vol. 10

Issue (4): 287-296

研究报告

本期目录 | 过刊浏览

椭圆偏振法研究镍表面的钝化膜

周庆初;徐乃欣;石声泰

中国科学院上海冶金研究所;中国科学院上海冶金研究所;中国科学院上海冶金研究所

AN ELLIPSOMETRIC STUDY OF PASSIVE FILMS FORMED ON NICKEL IN BORIC ACID-BORAX SOLUTION

Zhou Oingchu Xu Naixin Shih Shengtai (Shanghai Institute of Metallurgy;Academia Sinica)

全文: PDF(831 KB)

摘要: 用椭圆偏振法研究了镍在硼酸盐缓冲溶液中,于初始钝化处(-0.5V,SCE)、稳定钝化处(0.4V)和钝化/过钝化交界处(0.8V)恒电位阳极极化时所生成的钝化膜。分析了钝化膜的厚度、生长动力学规律、成份和生长机理。结果表明:钝化膜的厚度、成份和生长机理都与外加电位有关;在所研究的电位下,钝化膜都具有双层结构;膜生长都先生成外层膜,随后在其下面再生成一层内层膜;内层膜的生长都服从线性规律,外层膜的生长规律分别为线性规律、抛物线规律和对数规律。

Abstract：Passive films formed on nickel in boric acld-borax solution at first passive potential(-0.5,vs.SCE),steady passive potential(0.4V,vs. SCE)and passive-transpassive potential(0.8V,vs.SCE)have been stu- died by ellipsometry.The results show that the thickness,kinetics, composition and mechanism of passive films are dependent upon applied potential;at above mentioned potentials,the passive films have a two- layer structure,in which the inner layer of the film grows subsequently from the outer layer of the film inwards;the growth of all inner layers follows a linear dependence on time whilst the kinetics of outer layers at-0.5,0.4 and 0,8 V is linear,parabolic and logarithmic respectively. At constant potential-0.5V,the thickness and composition of inner and outer layers are 223 ,β-Ni(OH)_2and 69,NiO·xH_2O;at 0.4 V,88 ,α-Ni(OH)_2and 33 ,NiO·xH_2O;and at 0,8V,254 ,γ_2-NiOOH and 304 ,β-NiOOH,respectively.

收稿日期: 1990-08-25

基金资助:国家自然科学基金资助课题

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周庆初;徐乃欣;石声泰. 椭圆偏振法研究镍表面的钝化膜[J]. 中国腐蚀与防护学报, 1990, 10(4): 287-296.
. AN ELLIPSOMETRIC STUDY OF PASSIVE FILMS FORMED ON NICKEL IN BORIC ACID-BORAX SOLUTION. J Chin Soc Corr Pro, 1990, 10(4): 287-296.

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https://www.jcscp.org/CN/ 或 https://www.jcscp.org/CN/Y1990/V10/I4/287

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