A surface analytical examination of passive layers on Cu/Ni alloys .1. Alkaline solution

被引:116
作者
Druska, P
Strehblow, HH
Golledge, S
机构
[1] UNIV DUSSELDORF,D-40225 DUSSELDORF,GERMANY
[2] UNIV WASHINGTON,SEATTLE,WA 98195
关键词
D O I
10.1016/0010-938X(96)00170-9
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The electrochemical formation of passive layers on Cu-20Ni, Cu-50Ni and Ni-20Cu in various electrolytes has been examined with X-ray photoelectron spectroscopy (XPS), UV photoelectron spectroscopy (UPS) and ion scattering spectroscopy (ISS). In this paper the results of investigations in alkaline solution (1.0 N NaOH) are discussed. On the surface of Cu/Ni alloys first an NI(OH)(2) layer is formed. Potential and time resolved measurements yield similar results for the structure of passive layers. At short times and low potentials the rapidly growing NI(OH)? leads to an accumulation of Cu at the metal surface which causes the formation of an oxide layer underneath, consisting mainly of CuO. At more positive potentials NiO enters the oxide sublayer. Cu2O appears to a minor extent at the metal/oxide interface during the initial stages of CuO formation and is no longer detected when CuO grows to a larger thickness at sufficiently positive potentials. In the potential range of the beginning of transpassive behaviour the top Ni(OH)2 layer is oxidized to NiOOH. Parallel to the NiOOH formation Cu(OH)2 is incorporated into the hydroxide overlayer. This transpassive oxidation causes a shift of the work function to larger values as determined by UPS and to the same shift of all XPS signals of oxide constituents to smaller binding energies similar to previous observations for pure Ni and Fe/Ni alloys. The passive layer on Cu/Ni alloys reflects the properties of both metal components. Copyright (C) 1996 Elsevier Science Ltd.
引用
收藏
页码:835 / 851
页数:17
相关论文
共 19 条
[1]   CORROSION OF CU AND CU-NI ALLOYS IN 0.5M NACL AND IN SYNTHETIC SEAWATER [J].
DHAR, HP ;
WHITE, RE ;
BURNELL, G ;
CORNWELL, LR ;
GRIFFIN, RB ;
DARBY, R .
CORROSION, 1985, 41 (06) :317-323
[2]   PRETREATMENT PROCEDURES FOR CORROSION STUDIES OF CUPRO-NICKEL ALLOYS IN SEA-WATER [J].
DOBB, DE ;
STORVICK, JP ;
PAGENKOPF, GK .
CORROSION SCIENCE, 1986, 26 (07) :525-536
[3]   QUANTITATIVE-DETERMINATION OF THE PASSIVE LAYER ON CU-NI ALLOYS [J].
DRUSKA, P ;
STREHBLOW, HH .
SURFACE AND INTERFACE ANALYSIS, 1995, 23 (7-8) :440-450
[4]   POTENTIAL-PH DIAGRAMS FOR 90-10 AND 70-30 CU-NI IN SEA-WATER [J].
EFIRD, KD .
CORROSION, 1975, 31 (03) :77-83
[5]   CORROSION, LAYER FORMATION, AND OXIDE REDUCTION OF PASSIVE IRON IN ALKALINE-SOLUTION - A COMBINED ELECTROCHEMICAL AND SURFACE ANALYTICAL STUDY [J].
HAUPT, S ;
STREHBLOW, HH .
LANGMUIR, 1987, 3 (06) :873-885
[6]   COMBINED ELECTROCHEMICAL AND SURFACE ANALYTICAL INVESTIGATIONS OF THE FORMATION OF PASSIVE LAYERS [J].
HAUPT, S ;
STREHBLOW, HH .
CORROSION SCIENCE, 1989, 29 (2-3) :163-182
[7]   XPS AND ISS EXAMINATIONS OF ELECTRODE SURFACES AND PASSIVE LAYERS WITH A SPECIMEN TRANSFER IN A CLOSED SYSTEM [J].
HAUPT, S ;
CALINSKI, C ;
COLLISI, U ;
HOPPE, HW ;
SPECKMANN, HD ;
STREHBLOW, HH .
SURFACE AND INTERFACE ANALYSIS, 1986, 9 (1-6) :357-365
[8]  
HAUPT S, 1987, J ELECTROANAL CHEM, V194, P179
[9]   XPS AND UPS EXAMINATIONS OF THE FORMATION OF PASSIVE LAYERS ON NI IN 1-M SODIUM-HYDROXIDE AND 0.5 M SULFURIC-ACID [J].
HOPPE, HW ;
STREHBLOW, HH .
SURFACE AND INTERFACE ANALYSIS, 1989, 14 (03) :121-131
[10]   XPS AND UPS EXAMINATIONS OF PASSIVE LAYERS ON NI AND FE53NI ALLOYS [J].
HOPPE, HW ;
STREHBLOW, HH .
CORROSION SCIENCE, 1990, 31 (pt 1) :167-177