The corrosion performance of Inconel 625 weldments within a fresh water cooling system

Conference · · Virginia Journal of Science; (United States)

OSTI ID:5569694

Enos, D G; Taylor, S R ^[1]

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1. Univ. of Virginia, Charlottesville, VA (United States)

Commercial power generation plants frequently experience extensive corrosion problems within their service water systems. The corrosion mechanism involved has been identified as a combination of both general as well as microbiologically induced corrosion (MIC). An appropriate solution to this problem is the substitution of a more corrosion resistant material in place of the currently applied steel piping. The focus of this project is to evaluate such a solution, in this case a low carbon steel pipe with an internal cladding of Inconel 625, a highly corrosion resistant, nickel based alloy. Of particular interest will be the behavior of the material around weldments throughout the system. Due to the non-equilibrium solidification nature of weldments, the actual material properties within the weld may be different than expected within the base material due to solute segregation, second phase precipitation, or, in the case of this clad material, dilution within the weldments. Issues which will be addressed include the susceptibility of the new material to MIC as well as its resistance to general corrosion.

• OSTI ID: 5569694
• Report Number(s): CONF-9205376--
• Conference Information: Journal Name: Virginia Journal of Science; (United States) Journal Volume: 43:2
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
200101* -- Fossil-Fueled Power Plants-- Cooling & Heat Transfer Equipment & Systems
ALLOY-NI61CR22MO9NB4FE3
ALLOYS
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
COOLING SYSTEMS
CORROSION
CORROSION RESISTANCE
CORROSION RESISTANT ALLOYS
ENERGY SYSTEMS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INCONEL 625
INCONEL ALLOYS
IRON ALLOYS
JOINTS
MATERIALS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM AL
POWER PLANTS
WELDED JOINTS