Corrosion of several alloys in superheated steam at 482 and 538/sup 0/C

Technical Report · Tue Oct 31 23:00:00 EST 1978

DOI:https://doi.org/10.2172/6533877· OSTI ID:6533877

Griess, J. C.; Maxwell, W. A.

The corrosion of several ferritic steels, Incoloy Alloy 800, Inconel 617, and type 304 stainless steel in superheated steam at 482 and 538/sup 0/C (755 and 811 K) was investigated. Specimens of the alloys, including welds and U-bends in some cases, are mounted in a once-through loop that receives steam from a fossil-fired power plant. This report presents the data obtained during the first 12,000 h of a planned 30,000-h test. All ferritic steels have shown similar weight gains and to this time no significant oxide exfoliation has occurred. The other materials have corroded at very low rates. Incoloy Alloy 800 that had been intergranularly corroded during pickling showed no further intergranular penetration in steam. Type 304 stainless steel was oxidized in a noununiform manner, but even in the affected areas attack was slight. Welded and highly stressed U-bend specimens of Inconel 617 and of Incoloy Alloy 800 welded either to itself or to 2/sup 1///sub 4/ Cr-1 Mo steel, showed no evidence of cracking nor any unusual oxide loss.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: W-7405-ENG-26
• OSTI ID: 6533877
• Report Number(s): ORNL/TM-6465
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
ALUMINIUM ALLOYS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
COBALT ALLOYS
CORROSION
CORROSION RESISTANT ALLOYS
CORROSIVE EFFECTS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
HIGH TEMPERATURE
INCOLOY 800
INCOLOY ALLOYS
INCONEL 617
INCONEL ALLOYS
INTERGRANULAR CORROSION
IRON ALLOYS
IRON BASE ALLOYS
JOINTS
MATERIALS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
STAINLESS STEEL-304
STAINLESS STEELS
STEAM
STEELS
WELDED JOINTS