Dating back to the eighteenth century chromium has been around for a long time. Discovered by Nicolas-Louis Vauguelin in 1798 Paris.
Then in 1856 Anton Geuther deposited chromium in a electrolytic chromium bath.
Somewhere between 1924 and 1926 Colin G. Fink and Charles H. Eldridge used catalysts in the chromic acid bath, they soon patented there find.
It took 125 years from discovery to its commercial use.
Chromium's hardness is like diamonds, it has excellent wear and corrosionresistance, very low friction with a high melting point.
All of these charactoristics make Hard Chrome invaluable for Industrial/Engineering uses.