Premium
Coking by metal dusting of nickel‐base alloys
Author(s) -
Strauß S.,
Krajak R.,
Grabke H.J.
Publication year - 1999
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/(sici)1521-4176(199911)50:11<622::aid-maco622>3.0.co;2-r
Subject(s) - metallurgy , materials science , metal , carbide , base metal , nickel , graphite , welding
Metal dusting of nickel and Ni‐base alloys occurs by inward and internal growth of graphite in the metal phase, leading to extrusion and ejection of metal particles, which catalyze carbon deposition, i.e. coking. Compared to metal dusting of iron and steels which occurs via intermediate carbide formation and leads to much finer metal particles, coking on the Ni‐base alloys is much less. This is caused by the larger size and smaller amount of metal particles formed by metal dusting and also by the clearly smaller rates of metal wastage on Ni‐base alloys.