Wear and Corrosion of Components under Stress and Subjected to Motion.
Abstract
The initial two-year study with full rotational motion (NADC-79137-60) was further extended with investigations under oscillatory motion to advance understanding of simultaneously occurring corrosion-wear phenomena in Navy aircraft components, and to use this knowledge to improve reliability in component performance. An additional corrosion-wear parameter, namely, coefficient of friction, was evaluated along with open-circuit potential, corrosion current density, and wear loss, which were statistically analyzed in terms of load, frequency, corrosion inhibitor, and lubricant, as well as run-in time. Corrosion-wear surface morphologies were examined with SEM and EDX, and surface roughness measurements were analyzed. The effect of wear on the corrosion process was very marked for alloys which were able to form a passive film. Disruption of the passive film was the principal factor leading to an increase in corrosion rate and wear loss, while surface deformation by increasing load and motion within the range evaluated appeared to be secondary. An increase in load at a constant frequency did not affect the polarization reaction processes as much as an increase in frequency at a constant load. It was clearly demonstrated that wear phenomena dominate the anodic polarization process, but not the cathodic polarization process.
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 05, 1984
- Accession Number
- ADA145781
Entities
People
- K. Y. Kim
- Sharmistha Bhattacharyya
Organizations
- IIT Research Institute