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US 5,803,795 AGranted
Method of treating inner surface of high-pressure gas vessel
AssigneeTeisan Kabushiki Kaisha
InventorShigeyoshi Nozawa
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Abstract
A method of treating an inner surface of a high-pressure gas vessel is disclosed. In the method, abrasive containing rust preventive is charged into the vessel made preferably of manganese steel or chrome-molybdenum steel and a wet-grinding step is carried out to obtain a maximum inner surface roughness of the vessel of 3 .mu.m or less. Thereafter, the inner surface is rinsed with an acidic rinsing solution.
Claims7
A method of treating an inner surface of a high-pressure gas vessel, the method comprising the steps of:
- introducing an abrasive (2) containing rust preventive into the high-pressure gas vessel (1) comprising at least one of manganese steel or chrome-molybdenum steel;
- wet grinding the inner surface of the vessel (1);
- and
- rinsing the inner surface of the vessel;
- wherein said wet-grinding step is effected to obtain in the vessel interior a maximum inner-surface roughness, Rmax, of no more than 3 .mu.m;
- and
- said rinsing step is performed using an acidic rinsing solution comprising at least one selected from the group consisting of diammonium citrate, sodium dihydrogen phosphate and sodium hydrogen diphosphate.
4 more elements
Dependencies are inferred from the claim text.