Calculation of Pourbaix Diagrams for C22 in Various Well Water Chemistries

Kaufman, L

Lawrence Livermore National Laboratory

关键词: Corrosion;    Welding;    Alloys;    Nickel;    Phase Stability;   

DOI  :  10.2172/15003151
RP-ID  :  UCRL-JC-150606
RP-ID  :  W-7405-ENG-48
RP-ID  :  15003151

美国|英语

来源: UNT Digital Library

【 摘 要 】

Design and Fabrication of the Waste Package for the Yucca Mountain Waste Package represents a formidable challenge of the total knowledge that exists today concerning the properties of a wide variety of materials systems. During the past few years considerable successes have been achieved by employing the techniques of the new ''Computational Thermodynamics'' CT[1 ] to address some of the most critical problems of phase stability with substantial success. In particular, phase stability in Alloy C22 which is a complex 10 component alloy in order to define the temperature dependence of the solidification, welding, heat treatment and transformation kinetics of the condensed liquid, fcc. Sigma, P-Phase and Ni{sub 2}Cr phases are very well described when the modern CT software and databases are applied. The present report provides a description of current progress in the application of this technique to define and detail the corrosion behavior of C-22 by using the Thermo-Calc software and data bases to apply the classic methods devised in the last century by Marcell Pourbaix[2] to C-22 in Simulated J-13 well waters (SAW) simulated acidic waters, SCW, simulated concentrated water and (BSW).The advantages of such a development is that it could provide substantial insight into methods for predicting corrosion behavior in critical components of the Waste Package that will have to function predictably for many tens of thousands of years.