Corrosion inhibitor compositions and methods of using same
Disclosed are inhibitor/cleaner compositions comprising alkyldiphenyloxide disulfonates, and methods of inhibiting corrosion of and removing schmoo from metal containments in contact with corrosive water sources. Also disclosed are metal containment assemblages comprising inhibitor/cleaner compositions and metal containment therefore. The alkyldiphenyloxide disulfonates are soluble or substantially soluble in the water sources and inhibit corrosion of the metal containments by the water sources containing corrodents. The alkyldiphenyloxide disulfonates also remove schmoo from the metal containments. The inhibitor/cleaners of the invention are useful for addition to produced waters and other corrosive water sources resulting from enhanced oil recovery operations. The inhibitor/cleaners inhibit corrosion of tanks, devices, and other metal containments such as carbon steel pipes which come into contact with produced waters from the oil recovery operations, while also providing schmoo reduction and removal from the metal containments. The inhibitor cleaners are also useful for addition to other corrosive aqueous fluids to inhibit corrosion of metal containments with which the aqueous fluids come into contact, such as corrosive aqueous discharge from mines and other industrial operations such as paper-making.
1. A method of inhibiting corrosion comprising:
applying about 5 ppm to about 4000 ppm of an inhibitor/cleaner to a water source to produce an inhibitor/cleaner composition, wherein the water source comprises a produced water, wherein the inhibitor/cleaner is substantially soluble in the water source and comprises one or more alkyldiphenyloxide disulfonates, wherein each of the one or more alkyldiphenyloxide disulfonates has the formula (I), (II), (III), or (IV)
wherein R is a dodecyl group, n is 1 or 2, and M + is selected from Na + , K + , NH 4 + , primary ammonium, secondary ammonium, tertiary ammonium, and quaternary ammonium; and contacting a surface of a metal containment with the inhibitor/cleaner composition, wherein about 1% to about 100% of the area of the surface comprises a schmoo attached to the surface, and wherein the inhibitor/cleaner composition inhibits corrosion of the metal containment and removes between about 10 wt % and about 100 wt % of the schmoo within four hours.
2. The method of claim 1 further comprising before the applying:
recovering a crude oil/produced water from a subterranean reservoir; and
separating the crude oil/produced water to provide the produced water and a crude oil.
3. The method of claim 1 , further comprising after the contacting:
reinjecting an injectate comprising the inhibitor/cleaner composition into a pipe in fluid communication with a subterranean reservoir; and
recovering a crude oil/recycled produced water from the subterranean reservoir.
4. The method of claim 1 , wherein the metal containment comprises a carbon steel.
5. The method of claim 1 , wherein the applying consists of applying between about 500 and about 2000 ppm of the inhibitor/cleaner to the water source, and wherein the concentration of the one or more alkyldiphenyloxide disulfonates in the inhibitor cleaner is from about 40% to about 75% by weight.
6. The method of claim 1 , wherein the produced water comprises connate, seawater, brackish water, residual hydrocarbons, a salt, a surfactant, an injectate, or any combination thereof.
7. The method of claim 1 , wherein the water source comprises between 100 ppm and 500 ppm of multivalent cations selected from magnesium ions, calcium ions, ferrous ions, strontium ions, barium ions, copper ions, cobalt ions, manganese ions, nickel ions, zinc ions, aluminum ions, and any combination thereof.
8. The method of claim 1 , wherein the dodecyl group is a branched dodecyl group.
9. A metal containment assemblage comprising a metal containment and an inhibitor/cleaner composition in contact with a surface of the metal containment, wherein about 1% to about 100% of the area of the surface of the metal containment comprises a schmoo attached to the surface, wherein the inhibitor cleaner composition comprises an inhibitor/cleaner and a water source, the inhibitor/cleaner comprising one or more alkyldiphenyloxide disulfonates, each alkyldiphenyloxide disulfonate of the one or more alkyldiphenyloxide disulfonates having the formula (I), (II), (III), or (IV)
wherein R is a dodecyl group, wherein n is 1 or 2, and wherein M + is selected from Na + , K + , NH 4 + , primary ammonium, secondary ammonium, tertiary ammonium, and quaternary ammonium,
wherein the water source comprises a produced water,
wherein the one or more alkyldiphenyloxide disulfonates are soluble in the water source, and wherein the inhibitor/cleaner composition inhibits corrosion of the metal containment and removes between about 10 wt % and about 100 wt % of the schmoo within four hours.
10. The assemblage of claim 9 , wherein the metal containment comprises carbon steel contacting the inhibitor/cleaner composition.
11. The assemblage of claim 9 , wherein the water source consists of the produced water.
12. The assemblage of claim 9 , wherein the concentration of the one or more alkyldiphenyloxide disulfonates in the inhibitor/cleaner composition is about 40 ppm to about 2000 ppm by weight.
13. The assemblage of claim 9 , wherein the concentration of the one or more alkyldiphenyloxide disulfonates in the inhibitor/cleaner is about 40% to about 75% by weight, and the concentration of the inhibitor cleaner in the inhibitor cleaner composition is between about 500 and about 2000 ppm by weight, and wherein the inhibitor/cleaner composition inhibits corrosion of the surface and removes between about 10 wt % and about 20 wt % of the schmoo within four hours.
14. The assemblage of claim 9 , wherein the metal containment comprises a pipe, a tank, a device, or combinations thereof, wherein the device is selected from a valve, a tap, a pressure gauge, a flowmeter, a stopcock, a pump, and any combination thereof.
15. The assemblage of claim 9 , wherein the dodecyl group is a branched dodecyl group.