Mineral oils: processes and products – Chemical conversion of hydrocarbons – With prevention of corrosion or erosion in system
Patent
1997-01-23
1998-09-15
Yildirim, Bekir L.
Mineral oils: processes and products
Chemical conversion of hydrocarbons
With prevention of corrosion or erosion in system
208 48R, 208138, 208139, C10G 7500, C23F 1100
Patent
active
058078428
ABSTRACT:
A hydrocarbon conversion process wherein austenitic stainless steel portions that are subject to halide stress-corrosion cracking conditions, such as the colder portions of the process equipment including effluent coolers, knockout drums, accumulation drums, and piping low points, are provided with a protective layer having improved halide stress-corrosion cracking resistance. The method comprises applying a metal cladding, plating, paint or other coating to a stressed portion of austenitic stainless steel hydrocarbon conversion process equipment, optionally curing the coated steel to form intermetallic compounds to protect the steel portions; converting hydrocarbons utilizing a halided catalyst or under conditions where a halogen-containing compound is added or evolved or both; and subjecting the protected steel portion to halide stress-corrosion cracking conditions. A preferred coating material comprises tin, and preferably one or more intermetallic layers are provided to at least a portion of an austenitic stainless steel substrate to improve its stress-corrosion cracking resistance.
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Buscemi Charles D.
Heyse John V.
Chevron Chemical Company
Priester Witta
Yildirim Bekir L.
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