Carbon Residue Studies with a Micro Carbon Residue Tester.
Abstract
A test procedure for the coking propensity of gas turbine lubricants was developed using the 'Micro Carbon Residue Tester-100' (MCRT-100). The MCRT-1009, a microprocessor controlled heating unit, was evaluated for its ability to determine carbon residue in weight percent of synthetic gas turbine lubricants under controlled static conditions (various time/temperature profiles and selected gas atmospheres). The purpose was to yield information on the amount of deposit remaining in glass vials after a measured volume of lubricant had been exposed to different degrading environments, varying the parameters of temperature, gas (air or nitrogen), and exposure time. During a test, several processes occur simultaneously. The major effect is volatilization of the lubricant. Substantial oxidation and thermal degradation of the lubricant also occurs, which forms residue in the glass vials. The degradation of the lubricant is not completely realistic because the evaporated oil is caught in the condensate trap of the MCRT-100, whereas condensate returns to the bulk oil in an engine and affects viscosity, acidity, and the degradation of the lubricant.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 01, 1986
- Accession Number
- ADA171153
Entities
People
- Wilhelm Bochartz
Organizations
- Wright Laboratory