Microstructural evolution and response to double-loop reactivation testing of heat-treated pH 13-8 Mo martensitic stainless steel

Conference · Thu Jan 01 00:00:00 EST 1987

OSTI ID:6231704

Cieslak, W R; Cieslak, M J; Hills, C R

The double loop electrochemical potentiokinetic reactivation (DL-EPR) test was used to investigate the intergranular and interlath corrosion susceptibility of pH 13-8 Mo as a function of heat treatment. Degree of sensitization was measured to the ratio of the peak current on a reverse (reactivation) scan to that on the forward anodic scan. Corrosion morphology was characterized by SEM, and microstructure by AEM. PH 13-8 Mo in the as-received condition was not sensitized. Precipitation-strengthening to the H925 temper caused susceptibility to intergranular corrosion, and averaging at H1150 caused susceptibility to interlath corrosion. Corrosion susceptibility was most likely caused by a classic Cr-depletion mechanism. 4 refs., 3 figs. (CS)

• Research Organization: Sandia National Labs., Albuquerque, NM (USA)
• DOE Contract Number: AC04-76DP00789
• OSTI ID: 6231704
• Report Number(s): SAND-87-1030C; CONF-871027-9; ON: DE87009058
• Resource Relation: Conference: 172. meeting of the Electrochemical Society, Honolulu, HI, USA, 18 Oct 1987; Other Information: Portions of this document are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
MOLYBDENUM ALLOYS
AGING
INTERGRANULAR CORROSION
MICROSTRUCTURE
PRECIPITATION HARDENING
STAINLESS STEELS
CHROMIUM
ELECTRON MICROSCOPY
GRAIN BOUNDARIES
HEAT TREATMENTS
MARTENSITE
MATRIX ELEMENTS
SCANNING ELECTRON MICROSCOPY
TEMPERING
VERY HIGH TEMPERATURE
ALLOYS
CARBON ADDITIONS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CORROSION
CORROSION RESISTANT ALLOYS
CRYSTAL STRUCTURE
ELEMENTS
HARDENING
IRON ALLOYS
IRON BASE ALLOYS
METALS
MICROSCOPY
STEELS
TRANSITION ELEMENTS
360105* - Metals & Alloys- Corrosion & Erosion
360102 - Metals & Alloys- Structure & Phase Studies