Reaction product of nitrogen bases and phosphate esters as corrosion inhibitors
A method for inhibiting corrosion of metal surfaces in an aqueous medium, comprising incorporating into the medium a corrosion inhibitor in an amount sufficient to inhibit corrosion, the corrosion inhibitor comprising a water-soluble agent selected from the group consisting of compositions of the formula ##STR1## compositions of the formula ##STR2## and mixtures thereof, wherein R is R.sup.2 .paren open-st.OCH.sub.2 CH.sub.2 .paren close-st..sub.x, wherein R.sup.2 is a substituted or unsubstituted alkyl, aryl, or aralkyl group of from about five to about fifteen carbon atoms, each carbon atom having at least one hydrogen and x is an integer of from about one to about ten, and R'N is a basic nitrogen compound that is at least water-dispersible.
Latest Baker Hughes Incorporated Patents:
Claims
2. A method as set forth in claim 1 wherein the agent is a composition of the formula ##STR15## wherein R and R'N are defined in claim 1.
3. A method as set forth in claim 2 wherein R.sup.2 is an unsubstituted alkyl group.
4. A method as set forth in claim 3 wherein the basic nitrogen compound is a compound of the formula ##STR16##
2968629 | January 1961 | Thompson |
3054750 | September 1962 | Jolly |
3133787 | May 1964 | Kelley |
3620974 | November 1971 | Stanford et al. |
3628926 | December 1971 | Eckert et al. |
3836462 | September 1974 | Larson |
3846071 | November 1974 | Redmore |
3909447 | September 1975 | Redmore et al. |
4042323 | August 16, 1977 | Redmore et al. |
4051029 | September 27, 1977 | Redmore et al. |
4066398 | January 3, 1978 | Hwa |
4169800 | October 2, 1979 | Dounchis |
4311662 | January 19, 1982 | Bellos |
4339349 | July 13, 1982 | Martin et al. |
4511480 | April 16, 1985 | Outlaw et al. |
4584021 | April 22, 1986 | Bartlett |
4604226 | August 5, 1986 | Bartlett |
4615813 | October 7, 1986 | Bretz |
4636256 | January 13, 1987 | Valone |
4722805 | February 2, 1988 | Martin |
4945992 | August 7, 1990 | Sacco |
5330662 | July 19, 1994 | Jahnke et al. |
0 002 530 | EPX | |
0 520 761 | EPX | |
0 256 802 | EPX | |
1 180 219 | DEX | |
1 103 713 | September 1955 | DEX |
3526640 | January 1987 | DEX |
54 139 843 | JPX | |
3-221597 | September 1991 | JPX |
8 901 407 | NLX | |
8 901 407 | January 1991 | NLX |
2 104 897 | GBX | |
0 847 321 | GBX | |
2104897 | March 1983 | GBX |
2146557 | April 1985 | GBX |
2170509 | August 1988 | GBX |
9 112 354 | WOX |
- European Search Report. (Jul. 1993).
Type: Grant
Filed: Dec 12, 1995
Date of Patent: Sep 7, 1999
Assignee: Baker Hughes Incorporated (Houston, TX)
Inventor: Richard L. Martin (Sugarland, TX)
Primary Examiner: Nancy Degen
Assistant Examiner: Deanna Baxan
Law Firm: Howell & Haferkamp, L.C.
Application Number: 8/571,041
International Classification: C23F 11167; C10G 7502;