Case Study 1 - XPS Analysis of Railhead Residue
Railhead swab sample before cleaning
Railhead swab sample after cleaning
XPS Survey scan from swab before cleaning
XPS Survey scan from swab after cleaning
The "before" analysis shows the tribological layer includes iron oxide and organic residue. The "after" analysis is largely that of the filter paper used to carry out the swabbing. This is confirmed by the high resolution spectra.