The susceptivity of mineral lubricating oils in use

✍ Scribed by Auld, S. J. M.

• Publisher: Wiley (John Wiley & Sons)
• Year: 1936
• Weight: 804 KB
• Volume: 55
• Category: Article
• ISSN: 0368-4075
• DOI: 10.1002/jctb.5000555102

✦ Synopsis

I n attetiiptiiig to discnt:ing!c tlic c1icinic:il aiid physical changcs which occur in inincrtil lubricating oils during use, one is early fiiccd with the difiiculty that little is known of their chemical structurc before use.--!yt e~?y,( thcrcforc, Qo visualize what is happening to tlic hfdrocnrbons conceriicd iiiidcr thc conditions chiefly responsible for clintigc-gcncrnlly lieat or osidntion. Rathcr vagucly thc chnnges arc vnriously described as " sludging," " guniniing," " tliickcning up," " acidifying," and otlicrwisc. Equnlly ~n w c l y it hris bccri cnstomnry to nscribc tltcsc crccts too'' polymerization " and " oxidntioii."

Fortunately tccltnicnl rind comnicrciul csigencies hnvc brought into bcing quitc good tcchitiquc for thc chnrnctcrization of lubricating oils. JIaiiy of the tests cmploycd must in themselves bc functions of the unknown molecular structure, as ircll ns I~ciug iiiorc or lcss iiicnsitrcs of tlic tccliiiicnl rnluc or suitability of thc oil. In this class nrc viscosity, density, rcfractivc indcs, iilid so 011.