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.
White collar work used to mean a high level of education and a cushy job with perks. That distinction today is blurred by the fact that white collar employment has become the dominant working class in the U.S. and other advanced nations.