Characterization of pack cemented Ni(2)Al(3 )coating exposed to KCl(s) induced corrosion at 600 degrees C
Artikel i vetenskaplig tidskrift, 2018

Oxidation of Ni2Al3 produced by pack aluminizing of pure nickel was studied with and without 0.10 mg cm(-2) KCl(s) deposit in an environment containing 5% O-2, 40% H2O and 55% N-2 at 600 degrees C for up to 168 h. Oxide microstructure and composition was investigated by SEM/EDX, BIB, TEM and GDOES. Oxidised Ni2Al3 shows minimal weight gain, while adding KCl results in a small weight loss consistent with evaporation of KCl. On the surface of samples exposed to the gas environment only, a 30 nm oxide of Al oxide was present, but where KCl was present as deposit, 50-250 nm thick nodules form that are enriched in K, O and Al.

KCl

Nickel aluminide

high temperature corrosion

electron microscopy

600 degrees C

Författare

K. V. Dahl

Danmarks Tekniske Universitet (DTU)

Andreas Slomian

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi

T. N. Lomholt

Danmarks Tekniske Universitet (DTU)

FORCE Technology

S. Kiamehr

Danmarks Tekniske Universitet (DTU)

F. B. Grumsen

Danmarks Tekniske Universitet (DTU)

M. Montgomery

Danmarks Tekniske Universitet (DTU)

Torbjörn Jonsson

Chalmers, Kemi och kemiteknik, Energi och material, Oorganisk miljökemi

Materials at High Temperatures

0960-3409 (ISSN)

Vol. 35 1-3 267-274

Ämneskategorier

Bearbetnings-, yt- och fogningsteknik

Materialkemi

Korrosionsteknik

DOI

10.1080/09603409.2017.1392112

Mer information

Senast uppdaterat

2018-07-06