Some interactions in the erosion-oxidation of alloys. [Ni-30Cr, MA754, Ni-20Al, Co-22Cr-11Al-0. 2Y]

Journal Article · Wed Aug 01 04:00:00 EDT 1990 · Oxidation of Metals; (United States)

DOI:https://doi.org/10.1007/BF00664340· OSTI ID:5412461

Chang, S L; Pettit, F S; Birks, N ^[1]

---

1. Univ. of Pittsburgh, PA (USA)

The modes of interaction of erosion and high-temperature oxidation, occurring simultaneously on an alloy surface, have been studied using Ni-30Cr, MA754, Ni-20Al, and Co-22Cr-11Al-0.2Y alloys to examine the influence of chromia and alumina scale formation on the erosion of nickel and cobalt base alloys. The results have shown that, in the presence of a rapidly flowing oxidizing gas stream, the evaporation of volatile metal oxides becomes important at lower temperatures where normally it can be ignored. Otherwise, the erosion and oxidation of alloys parallels the behavior of pure metals but also introduces additional factors derived from lengthening of the period of transient oxidation and modification of concentration profiles in the alloy adjacent to the alloy/scale interface. Higher erosion intensities extend the transient oxidation behavior which adversely affects the formation of protective scales. As with pure metals, the presence of erosion and oxidation together always produced increased rates of degradation.

• OSTI ID: 5412461
• Journal Information: Oxidation of Metals; (United States), Journal Name: Oxidation of Metals; (United States) Vol. 34:1-2; ISSN 0030-770X; ISSN OXMEA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
ALUMINIUM ALLOYS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CHALCOGENIDES
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM COMPOUNDS
CHROMIUM OXIDES
COBALT ALLOYS
COBALT BASE ALLOYS
COHERENT SCATTERING
CORRELATIONS
DIFFRACTION
ELECTRON MICROSCOPY
EROSION
EVAPORATION
FLUID FLOW
GAS FLOW
KINETICS
LASERS
MEASURING INSTRUMENTS
MICROSCOPY
NICKEL ALLOYS
NICKEL BASE ALLOYS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
REACTION KINETICS
SCALING
SCANNING ELECTRON MICROSCOPY
SCATTERING
SURFACE PROPERTIES
TEST FACILITIES
TIME DEPENDENCE
TRANSITION ELEMENT COMPOUNDS
VELOCIMETERS
VERY HIGH TEMPERATURE
VOLATILITY
X-RAY DIFFRACTION
YTTRIUM ADDITIONS
YTTRIUM ALLOYS