Invention Grant
- Patent Title: Chromiun-enriched oxide containing material and preoxidation method of making the same to mitigate corrosion and fouling associated with heat transfer components
- Patent Title (中): 富含氧化铬的氧化物材料和预氧化方法,以减少与传热组分相关的腐蚀和结垢
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Application No.: US13193223Application Date: 2011-07-28
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Publication No.: US08465599B2Publication Date: 2013-06-18
- Inventor: ChangMin Chun , Mark A. Greaney , Thomas Bruno , Ian A. Cody , Trikur A. Ramanarayanan
- Applicant: ChangMin Chun , Mark A. Greaney , Thomas Bruno , Ian A. Cody , Trikur A. Ramanarayanan
- Applicant Address: US NJ Annandale
- Assignee: ExxonMobil Research and Engineering Company
- Current Assignee: ExxonMobil Research and Engineering Company
- Current Assignee Address: US NJ Annandale
- Agent Glenn T. Barrett
- Main IPC: C23C8/14
- IPC: C23C8/14

Abstract:
A method of providing sulfidation corrosion resistance and corrosion induced fouling resistance for a heat transfer component is disclosed. The heat transfer component includes a heat exchange surface formed from a chromium-enriched oxide containing material formed from the composition δ, ε, and ζ, wherein ζ is a steel containing at least about 5 to about 40 wt. % chromium, ε is a chromium enriched oxide (M3O4 or M2O3 or mixtures thereof) formed on the surface of the steel ζ, wherein M is a metal containing at least 5 wt. % Cr based on the total weight of the metal M, and δ is a top layer formed on the surface of the chromium-enriched oxide ε, comprising sulfide, oxide, oxysulfide, and mixtures thereof. The top layer δ comprises iron sulfide (Fe1-xS), iron oxide (Fe3O4), iron oxysulfide, iron-chromium sulfide, iron-chromium oxide, iron-chromium oxysulfide, and mixtures thereof. The metal M of the chromium enriched oxide (M3O4 or M2O3 or mixtures thereof) may comprise Fe, Cr, and constituting elements of the steel ζ. The steel ζ may be selected from low chromium steels, ferritic stainless steels, martensitic stainless steels, austenitic stainless steels, duplex stainless steels and precipitation-hardenable alloys.
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