Potential-pH diagrams for sulfur and hydroxyl adsorbed on copper surfaces in water containing sulfides, sulfites or thiosulfates

被引:43
作者
Protopopoff, E [1 ]
Marcus, P [1 ]
机构
[1] Univ Paris 06, Ecole Natl Super Chim Paris, Lab Physicochim Surfaces, CNRS UMR 7045, F-75005 Paris, France
关键词
D O I
10.1016/S0010-938X(02)00210-X
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The principle of equilibrium potential-pH (Pourbaix) diagrams can be extended to the case of bidimensional layers of species adsorbed on metal surfaces. It allows us to predict the E-pH conditions of adsorption of sulfur and hydroxyl on copper surfaces immersed in water containing dissolved sulfur species such as sulfides, sulfites or thiosulfates. The E- pH relations associated with the equilibria between water and adsorbed hydroxyl, and between dissolved sulfur species and adsorbed sulfur are given at 25 degreesC. The E-pH adsorption diagrams are calculated for a sulfur concentration of 10(-4) mol kg(-1) and superimposed to the usual Pourbaix diagrams for the S-Cu-H2O system. It is shown that an adsorbed sulfur monolayer may form on the copper surfaces in E-pH domains in which usual Pourbaix diagrams predict no stability of the bulk copper sulfide. The calculation of stability domains of adsorbed sulfur allows prediction of the corrosion risk for copper-based materials in sulfur-containing aqueous environments. (C) 2002 Elsevier Science Ltd. All rights reserved.
引用
收藏
页码:1191 / 1201
页数:11
相关论文
共 43 条
[1]  
AMBROSE J, 1973, J ELECTROANAL CHEM, V47, P47, DOI 10.1016/0368-1874(73)80053-X
[2]  
AMRCUS P, 1995, CORROSION MECH THEOR, pCH9
[3]  
[Anonymous], NP2400 EPRI
[4]  
[Anonymous], ADV LOCALIZED CORROS
[5]   THERMODYNAMICS OF SOME METALLIC 2D-SULFIDES [J].
BENARD, J ;
OUDAR, J ;
BARBOUTH, N ;
MARGOT, E ;
BERTHIER, Y .
SURFACE SCIENCE, 1979, 88 (2-3) :L35-L41
[6]   Revised pourbaix diagrams for copper at 25 to 300 degrees C [J].
Beverskog, B ;
Puigdomenech, I .
JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1997, 144 (10) :3476-3483
[7]   Oxide film formation and oxygen adsorption on copper in aqueous media as probed by surface-enhanced Raman spectroscopy [J].
Chan, HYH ;
Takoudis, CG ;
Weaver, MJ .
JOURNAL OF PHYSICAL CHEMISTRY B, 1999, 103 (02) :357-365
[8]  
COMBRADE P, 1990, P 4 INT S ENV DEGR M, P5
[9]  
COMBRADE P, 1990, P 4 INT S ENV DEGR M, P8
[10]  
Costa D., 1994, P EUR S MOD PASS FIL, P17