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A method for investigation of hot corrosion by gaseous Na2SO4

Pavleta Knutsson (Institutionen för kemi- och bioteknik, Oorganisk miljökemi) ; Haiping Lai (Institutionen för teknisk fysik, Materialens mikrostruktur ) ; Krystyna Stiller (Institutionen för teknisk fysik, Materialens mikrostruktur )
Corrosion Science (0010-938X). Vol. 73 (2013), p. 230-236.
[Artikel, refereegranskad vetenskaplig]

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.

Nyckelord: Hot corrosion, Superalloy, Sulfidation, SEM, XPS

Denna post skapades 2013-08-09. Senast ändrad 2017-09-14.
CPL Pubid: 180956


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Institutioner (Chalmers)

Institutionen för kemi- och bioteknik, Oorganisk miljökemi (2005-2014)
Institutionen för teknisk fysik, Materialens mikrostruktur (2012-2015)


Metallurgi och metalliska material

Chalmers infrastruktur

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High temperature oxidation and corrosion of NiAl coatings