Iron Corrosion From Oil In Transformer
The orange particle is limonite.
Transmitted Off Crossed Circular Polarized Light
Definition/Function:
Limonite is FeO-OH-nH2O. It varies in color from very pale yellow to
orange-brown, depending
on the amount of water in the matrix. In oil filled systems the form of the limonite
particle reflects the shape of the interface between the
oil and the water layer. Limonite is amorphous or cryptocrystalline but as it looses
more water the nuclei convert to a more evident crystal
structure. There are at least five forms of FeO-OH that have distinctive crystal
structures. They include lepidocrocite, goethite, and others.
Significance in the Environment:
Characteristic Features:
Associated Particles:
References:
