Jim Allen
Well-Known Member
- Joined
- Jun 7, 2005
- Messages
- 1,622
The photo shows a complete chroming tank with heaters. The chrome tank is maintained at 130 deg F & is run at a current density of 3 amps/sq in. The total current required for the brass holding fixture & the .95 cu in size cylinder is 24 amps. The brass holding fixture prevents the buildup of chrome on the top & bottom of the cylinder. This buildup now takes place on the brass fixture & is removed from the brass holding fixture afterwards with a warm 50% solution of HLC acid. At a current density of 3 amps/sq in, .0012" of chrome/side/hour will be deposited. In 2 to 2.5 hours, a total of .0024"+ of chrome will be deposited on the cylinder's inner wall. This simple bath will deposit chrome with a hardness of 1,000 Vickers. Carbide tooling WILL NOT cut 900 Vickers hard chrome!
Jim Allen
Jim Allen