A method for investigation of hot corrosion by gaseous Na2SO4
Artikel i vetenskaplig tidskrift, 2013

A novel in situ exposure method for investigating hot corrosion of aluminde coatings in the absence of an alkali sulphate melt is presented. The samples are exposed to Na2SO4(g) at a temperature above the dew point of the gas. Results from 100 and 500 h exposures at 900 degrees C of Ni-based In792 covered with SIF232 aluminide coating are presented. Already after 100 h of testing, attack characteristic for Type I hot corrosion is observed. The reactions taking place during the testing are discussed and the results are compared with those from the well-known ex situ salt hot corrosion test.

XPS

Sulfidation

SEM

Superalloy

Hot corrosion

Författare

Pavleta Knutsson

Chalmers, Kemi- och bioteknik, Oorganisk miljökemi

Haiping Lai

Chalmers, Teknisk fysik, Materialens mikrostruktur

Krystyna Marta Stiller

Chalmers, Teknisk fysik, Materialens mikrostruktur

Corrosion Science

0010-938X (ISSN)

Vol. 73 230-236

Ämneskategorier

Metallurgi och metalliska material

DOI

10.1016/j.corsci.2013.04.006