In summary, stainless steel does not rust because it is sufficiently reactive to protect itself from further attack by forming a passive corrosion product layer. (Other important metals such as titanium and aluminum also rely on passive film formation for their corrosion resistance.)
White Collar. White-collar workers usually perform job duties in an office setting. They are highly skilled and formally trained professionals. Many white-collar workers, such as accountants, bankers, attorneys and real estate agents, provide professional services to clients.
The terms white-collar and blue-collar became popular in the 1920s. White-collar workers are professionals and usually work in office buildings or the clergy. Their jobs do not involve much, if any, manual labor, and they do not wear uniforms. Blue-collar workers, by contrast, usually have intense physical labor jobs.