The basis of characters in many authors' books in Emperor Norton.
Quench polish quench -LRB- QPQ -RRB- is a specialized type of nitrocarburizing case hardening that increases corrosion resistance .. nitrocarburizing. nitrocarburizing. case hardening. case hardening. corrosion resistance. corrosion resistance. It is sometimes known by the brand name of Tufftride , Tenifer or Melonite .. Three steps are involved  : nitrocarburize -LRB- `` quench '' -RRB- , polish , and post-oxidize -LRB- `` quench '' -RRB- .. This process is often used when two or more of the following properties are required in a workpiece  :. wear resistance. wear resistance. wear resistance. corrosion resistance. corrosion resistance. corrosion resistance. lubricity. lubricity. lubricity. fatigue strength .. fatigue strength. fatigue strength. Common applications of the process are for piston rods of shock absorbers , cylinders and rods for hydraulic systems , pumps , axles , spindles and valves .. hydraulic. hydraulic. spindles. spindle ( tool )