When exposed to sulphur species in bio-environments, iron and steel first develop a poorly protective film of mackinawite
(an iron sulfide rich in iron) that changes later, to a more stable iron sulfides through different chemical and electrochemical paths.
2]S-free) corrosion rate by 3-10 times due to formation of a thin mackinawite
The sulfur released by pyrite decomposition and the free CaO released from partial pyrolysis of calcium carbonate react and form a CaS-type phase, whereas the uncompleted decomposition process of pyrite may produce mackinawite
[FeS] type phases.
At Thompson, magmatic nickeliferous sulphides are predominantly composed of pyrrhotite, pentlandite, chalcopyrite, and mackinawite
Lennie AR, Redfern SAT, Champness PE, Stoddart CP, Schofield PF, Vanghan DJ (1997) Transformation of mackinawite
to greigite: An in-situ -ray powder diffraction and transmission electron microscope study.
Where the dominant contaminant is iron sulfide in the mackinawite
or troilite form, a noticeable reddish color will occur in treated samples almost immediately.
The AVS method of Bush and Sullivan (1998) uses 12 M HCI and extracts monosulfides including amorphous FeS, mackinawite
, and greigite.
amorphous sulfides, mackinawite
, and greigite ([Fe.