Study regarding corrosiveness and thermal stability of some insulating oils in contact with red cooper and S235J2G3 carbon steel
- Resource Type
- Conference
- Authors
- Voina, Andreea; Radu, Elena; Mitrea, Sorina; Oprina, Gabriela; Lingvay, Iosif; Serban, Florentina; Pica, Alexandra
- Source
- 2016 Diagnostic of Electrical Machines and Insulating Systems in Electrical Engineering (DEMISEE) Diagnostic of Electrical Machines and Insulating Systems in Electrical Engineering (DEMISEE), 2016. :44-47 Jun, 2016
- Subject
- Components, Circuits, Devices and Systems
Engineered Materials, Dielectrics and Plasmas
Power, Energy and Industry Applications
Vegetable oils
Steel
Minerals
Heat treatment
Copper
Thermal stability
insulating oils
thermal stability
corrosiveness
red cooper
carbon steel
- Language
The corrosiveness and thermal stability of five types of insulating oils — both in contact and contactless with copper and S235J2G3 carbon steel — have been studied through gravimetric determination, XRF analysis and dynamic viscosity measurements. The experimental results showed that, after a heat treatment (700 hours) at 110± 30°C, the weight of the investigated samples by mineral oil drops (by volatilization) to be between 7 and 7.5%. For vegetable oils have not been registered remarkable changes in weight. The XRF analyzes revealed that the investigated new minerals oils have a sulfur content up to 0.03% and the used oil sample (30 years in transformer) up to 0.14%. Sulfur content in the vegetable oils has been not recorded. Corrosion of copper and carbon steel in the investigated oils increased due to increasing the sulfur content.