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- W2486403727 abstract "This work examined the effect of systematic variation in the amounts of cerium, sulfur and silicon on corrosion resistance in an AISI 8630 base material and weldments exposed to sterile and biologically active anaerobic aqueous solutions. Significant correlation between microbiologically influenced corrosion (MIC) susceptibility and sulfide inclusion size, shape, chemical stability and spatial distribution were found in these materials. In addition, significant correlation was found between these factors and bacterial attachment, but only during a critical time period in film evolution. These factors were found to affect the evolution of microbial consortia at metal surfaces and subsequent corrosion at attachment sites, as measured by pit initiation and maximum pit size. The results suggest mitigation strategies based on microstructural design. A two-level, three-factor full factorial experiment, with AISI 8630 as the master composition, was used to relate minor element composition to both MIC susceptibility and microbial attachment in weld composite zones, partially melted zones (PMZ) and adjacent base metal regions. In all cases studied, MIC susceptibility was greatest in the PMZ. In addition, the MIC susceptibility of LAS was significantly altered by differences in fabrication procedure as measured by changes to heat input. Samples exposed to sterile solutions were significantly lessmore » corroded. Higher energy density processes and lower heat inputs diminished MIC sensitivity. In both base metal and welded samples the addition of Cerium was found to diminish MIC susceptibility. Cerium causes this through its effect on inclusion geometry, chemical stability and thermal stability.« less" @default.
- W2486403727 created "2016-08-23" @default.
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- W2486403727 date "1996-12-31" @default.
- W2486403727 modified "2023-09-23" @default.
- W2486403727 title "The effect of weld thermal cycling of microbial interaction in low alloy steels" @default.
- W2486403727 hasPublicationYear "1996" @default.
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