Corrosion inhibitor for mitigating alkaline carbonate stress corrosion cracking
Compounds, compositions and methods are provided for reducing, inhibiting, or preventing corrosion of a surface, using a corrosion-inhibiting composition comprising a dispersant having the structure of Formula 1 and a corrosion inhibitor having the structure of Formula 2 wherein X 1 is hydroxyl, —OC(O)R 1 ; X 2 is hydroxyl, or —OC(O)R 2 ; X 3 is hydroxyl or —OC(O)R 3 ; R 1 , R 2 , and R 3 are independently C 10 to C 30 alkyl or alkenyl; m, n, and o are independently integers from 1 to 10; R 20 , R 21 , R 22 , R 23 , and R 24 are independently hydrogen or —C(O)—R 31 ; R 31 is C 10 to C 30 alkyl or alkenyl; p is an integer of 0 or 1; q is an integer of 1 to 4; r is an integer of 0 or 1; s is an integer of 0 or 1; t is an integer from 1 to 4; and p1, q1, r1, r2, s1, and t1 are independently integers from 1 to 6; wherein when p, r, and s are 0, q+t is an integer from 4 to 8 and at least one of R 20 , R 21 , R 22 , R 23 , and R 24 is —C(O)—R 31 .
1. A corrosion-inhibiting composition comprising a dispersant having the structure of Formula 1 and a corrosion inhibitor having the structure of Formula 2:
wherein
X 1 is hydroxyl or —OC (O) R 1 ;
X 2 is hydroxyl or —OC (O) R 2
X 3 is hydroxyl or —OC (O) R 3 ;
R 1 , R 2 , and R 3 are independently C 10 to C 30 alkyl or alkenyl;
m, n, and o are independently integers from 1 to 10;
R 20 , R 21 , R 22 , R 23 , and R 24 are independently hydrogen or —C (O)—R 31 ;
R 31 is C 10 to C 30 alkyl or alkenyl;
p is an integer of 0 or 1;
q is an integer of 1 to 4;
r is an integer of 0 or 1;
s is an integer of 0 or 1;
t is an integer from 1 to 4; and
p1, q1, r1, r2, s1, and t1 are independently integers from 1 to 6;
wherein when p, r, and s are 0, q+t is an integer from 4 to 8;
wherein the sum of p, q, r, s, and t results in a compound with five or more amine groups; and wherein at least one of R 20 , R 21 , R 22 , R 23 , and R 24 is —C(O)—R 31 .
2. The corrosion-inhibiting composition of claim 1 , wherein m, n, and o are independently integers from 1 to 8.
3. The corrosion-inhibiting composition of claim 1 , wherein X 1 is hydroxyl or —OC(O)R 1 .
4. The corrosion-inhibiting composition of claim 3 , wherein X 1 is hydroxyl.
5. The corrosion-inhibiting composition of claim 3 , wherein X 1 is —OC(O)R 1—.
6. The corrosion-inhibiting composition of claim 5 , wherein R 1 is C 12 to C 24 alkyl or alkenyl.
7. The corrosion-inhibiting composition of claim 1 , wherein X 2 is hydroxyl or —OC(O)R 2 .
8. The corrosion-inhibiting composition of claim 7 , wherein X 2 is hydroxyl.
9. The corrosion-inhibiting composition of claim 7 , wherein X 2 is —OC(O)R 2 .
10. The corrosion-inhibiting composition of claim 9 , wherein R 2 is C 12 to C 24 alkyl or alkenyl.
11. The corrosion-inhibiting composition of claim 1 , wherein X 3 is hydroxyl or —OC(O)R 3 .
12. The corrosion-inhibiting composition of claim 11 , wherein X 3 is hydroxyl.
13. The corrosion-inhibiting composition of claim 11 , wherein X 3 is —OC(O)R 3 .
14. The corrosion-inhibiting composition of claim 13 , wherein R 3 is C 12 to C 24 alkyl or alkenyl.
15. The corrosion-inhibiting composition of claim 1 , wherein the dispersant of Formula 1 has the structure of Formula 1A:
16. The corrosion-inhibiting composition of claim 15 , wherein p1, q1, r1, r2, s1, and t1 are independently integers from 2 to 6.
17. The corrosion-inhibiting composition of claim 1 , wherein the corrosion inhibitor of Formula 2 has the structure of Formula 2A:
18. The composition of claim 17 , wherein R 31 is C 12 to C 24 alkyl or alkenyl.
19. The corrosion-inhibiting composition of claim 1 , further comprising a solvent, wherein the solvent is a hydrocarbon solvent.