sharing our knowledge.
Photographic gallery.  Thousands of particles under the microscope.
Degraded Rayon From a Transformer Oil Sample

Degraded Rayon From a Transformer Oil Sample

This is an example of a rayon fiber that has undergone hydrothermal degradation in a transformer environment. The average polymer length is reduced with a resultant loss of birefringence and a reduction in the refractive index along the length.

Transmitted Circular Polarized Light Illumination


Rayon fiber cord is sometimes used as ties in the transformer or on leads as insulation.

Significance in the Environment:

This type of degradation indicates temperatures typically over 90 degrees Celsius and elevated moisture content.

Characteristic Features:

Associated Particles: