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

Journal Article · Wed Aug 01 00:00:00 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), Vol. 34:1-2; ISSN 0030-770X
• Country of Publication: United States
• Language: English

Related Subjects

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