The Influence of Temperature on Oxide-Scale Formation during Erosion--Corrosion
Artikel i vetenskaplig tidskrift, 2005

Four steels (Fe2.25Cr1Mo, Fe9Cr1Mo, AISI 304, 353 MA) and one Nibased superalloy (Inconel 625) were exposed in an erosion-corrosion test rig at the temperatures 20, 350, 550 and 700°C for 1 week. The atmosphere was air and the particle velocity 1.2 m/s. The composition and thickness of the developed surface layers were determined by Auger electron spectroscopy and X-ray photoelectron spectroscopy. The ferritic and Ni-based alloys investigated show a minimum in wastage rate around 350°C due to the development of a particle strengthened/toughened composite layer on the surface. The greatest wastage rates were measured at 700°C. Rapid diffusion paths created in the oxide from the particle bombardment results in the growth of oxide nodules at the oxide/metal-interface causing protruding oxide flakes which are chipped away. At this temperature the ferritic steel Fe9Cr1Mo is degraded to a larger extent than the austenitic steels.

erosion--corrosion

AES

surface analysis

particle strengthening

XPS

Författare

Rikard Norling

Chalmers, Material- och tillverkningsteknik, Yt- och mikrostrukturteknik

Anders Nylund

Chalmers, Material- och tillverkningsteknik, Yt- och mikrostrukturteknik

Oxidation of Metals

0030-770X (ISSN) 1573-4889 (eISSN)

Vol. 63 1-2 87 - 111

Ämneskategorier

Materialteknik

DOI

10.1007/s11085-005-1953-4