Chemistry: electrical and wave energy – Processes and products – Electrostatic field or electrical discharge
Patent
1990-11-07
1992-02-04
Valentine, Donald R.
Chemistry: electrical and wave energy
Processes and products
Electrostatic field or electrical discharge
2041299, 20412995, 2041415, C25F 100, C25F 306, C25F 324
Patent
active
050857452
ABSTRACT:
The present invention is directed to a method for providing substantially particulate free gases by dispensing a highly pressurized gas from a carbon steel cylinder. The carbon steel cylinder is made by a process comprising the steps of forming an open ended cylinder from a billet, blank or tube of carbon steel. The side walls of the cylinder are made thicker than the desired final thickness of the cylinder side wall. One end of the cylinder is closed. The interior of the cylinder side walls is then honed to remove at least some of the excess side wall thickness. A tapered neck is then formed and tapped in the open end of the cylinder. The interior surface of the cylinder is then electropolished with a chromium rich electroplating solution to provide a surface layer with reduced iron and increased carbon and chromium on the interior surface wall of the cylinder. The cylinder may then be vacuum baked to reduce adsorbed contamination.
REFERENCES:
patent: 2048578 (1936-07-01), Vander Horst
patent: 2314604 (1943-03-01), Vander Horst
patent: 2475586 (1949-07-01), Bartlett
patent: 2935455 (1960-05-01), Swagler
patent: 2980593 (1961-04-01), Larson
patent: 3726773 (1973-04-01), Lamb et al.
patent: 4372831 (1983-02-01), Rosswag
patent: 4772337 (1988-09-01), Kesten
Bellafiore Francis V.
Farber Scott A.
Liquid Carbonic Corporation
Valentine Donald R.
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