LEADER 00000nam  2200349   4500 
001    AAI3121616 
005    20051017073445.5 
008    051017s2003                        eng d 
020    0496689673 
035    (UnM)AAI3121616 
040    UnM|cUnM 
100 1  Mintz, Todd Samuel 
245 13 An in-situ investigation of the passive film on stainless 
       steel and Inconel 600 in high temperature, pressurized, 
       impurity containing water 
300    400 p 
500    Source: Dissertation Abstracts International, Volume: 65-
       02, Section: B, page: 0978 
500    Chair:  Thomas M. Devine 
502    Thesis (Ph.D.)--University of California, Berkeley, 2003 
520    An in situ investigation of the films that formed on 
       stainless steel and Inconel 600 at 288°C and 1500psi 
       were performed using Surface Enhanced Raman Spectroscopy 
       (SERS). By examining the changes in the films that formed 
       on these materials, information was obtained about how 
       these films affect the Intergranular Stress Corrosion 
       Cracking (IGSCC) of these two metals. Stainless steel was 
       examined in water with dilute amounts of sulfate added, 
       which is known to enhance IGSCC. It was observed that the 
       addition of sulfates in no way affected the films that 
       formed on the stainless steel. The enhanced susceptibility
       for IGSCC of stainless steel is due to an increase in the 
       conductivity of the water. The increased conductivity, due
       to the added sulfate, reduced the potential drop down a 
       crack, so the minimum concentration of oxygen required to 
       cause IGSCC is less than in high purity water. Thus, the 
       sulfate additions led to an enhancement in the IGSCC. 
       Incone1 600 was studied in boron and lithium containing 
       solution at 288°C. The results showed that in the 
       corrosion potential region where IGSCC occurs, an M3O4 
       oxide enriched in chromium was stable. This suggested that
       the M3O4 was the deleterious film that enhanced SCC in the
       Inconel 600. Once the potential was increased above the 
       SCC region, NiO formed, which must counteract the effects 
       of the chromium enriched M3O4. The results from this study
       suggested that there is a correlation between film 
       formation and SCC susceptibility 
590    School code: 0028 
590    DDC 
650  4 Engineering, Materials Science 
650  4 Engineering, Nuclear 
650  4 Engineering, Metallurgy 
690    0794 
690    0552 
690    0743 
710 20 University of California, Berkeley 
773 0  |tDissertation Abstracts International|g65-02B 
856 40 |uhttp://pqdd.sinica.edu.tw/twdaoapp/servlet/