DIMERCAPTOTHIADIAZOLES TO PREVENT CORROSION OF MILD STEEL BY ACID GASES IN OIL AND GAS PRODUCTS

Corrosion inhibitor compositions containing at least one sulfur compound and/or at least one aqueous-soluble salt of a sulfur compound inhibit or prevent mild steel corrosion by an acid gas such carbon dioxide (C02) and/or hydrogen sulfide (H2S) in oil and gas production processes. The sulfur compou...

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Bibliographische Detailangaben
Hauptverfasser:	JOVANCICEVIC, VLADIMIR, RAMACHANDRAN, SUNDER
Format:	Patent
Sprache:	eng ; fre
Schlagworte:	CHEMICAL SURFACE TREATMENT CHEMISTRY COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL COATING MATERIAL WITH METALLIC MATERIAL COATING METALLIC MATERIAL DIFFUSION TREATMENT OF METALLIC MATERIAL INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL METALLURGY MULTI-STEP PROCESSES FOR SURFACE TREATMENT OF METALLICMATERIAL INVOLVING AT LEAST ONE PROCESS PROVIDED FOR IN CLASSC23 AND AT LEAST ONEPROCESS COVERED BY SUBCLASS C21D OR C22F OR CLASS C25 NON-MECHANICAL REMOVAL OF METALLIC MATERIAL FROM SURFACE
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Zusammenfassung:	Corrosion inhibitor compositions containing at least one sulfur compound and/or at least one aqueous-soluble salt of a sulfur compound inhibit or prevent mild steel corrosion by an acid gas such carbon dioxide (C02) and/or hydrogen sulfide (H2S) in oil and gas production processes. The sulfur compound may be a compound comprising at least three sulfur atoms, at least one of which is a thioether functional group. One suitable, but non-limiting, sulfur compound having at least three carbon atoms is 2,5-dimercapto-1,3,4-thiadiazole and salts thereof. The pH of the corrosion inhibitor composition may be optionally adjusted to be within about 5 to about 10 using an alkali metal hydroxide and/or an amine. L'invention concerne des compositions inhibitrices de la corrosion contenant au moins un composé de soufre et/ou au moins un sel soluble dans l'eau d'un composé de soufre pour inhiber ou empêcher la corrosion de l'acier doux par un gaz acide, tel que du dioxyde de carbone (CO2) et/ou du sulfure d'hydrogène (H2S) dans des processus de production de pétrole et de gaz. Le composé de soufre peut être un composé comprenant au moins trois atomes de soufre, dont au moins un est un groupe fonctionnel de thioéther. L'un des composés de soufre approprié, mais non limitatif, ayant au moins trois atomes de carbone est le 2,5-dimercapto-1,3,4-thiadiazole et les sels de celui-ci. Le pH de la composition inhibitrices de la corrosion peut être éventuellement ajusté pour être dans la plage d'environ 5 à environ 10 à l'aide d'un hydroxyde de métal alcalin et/ou d'une amine.