US 11,987,726 B2
Compositions for inhibiting corrosion
James Ivan Mardel, Acton (AU); Ivan Stewart Cole, Acton (AU); Paul Andrew White, Acton (AU); Anthony Ewart Hughes, Acton (AU); Tracey Anne Markley, Acton (AU); Timothy Graham Harvey, Acton (AU); Joseph Osborne, Seattle, WA (US); and Erik Sapper, Grover Beach, CA (US)
Assigned to THE BOEING COMPANY, Arlington, VA (US)
Filed by COMMONWEALTH SCIENTIFIC AND INDUCTRIAL RESEARCH ORGANISATION, Action (AU); and THE BOEING COMPANY, Arlington, VA (US)
Filed on Jan. 23, 2023, as Appl. No. 18/100,230.
Application 17/067,453 is a division of application No. 15/562,826, granted, now 10,800,929, issued on Oct. 13, 2020, previously published as PCT/AU2016/050245, filed on Mar. 31, 2016.
Application 18/100,230 is a continuation of application No. 17/067,453, filed on Oct. 9, 2020, granted, now 11,560,483, issued on Jan. 24, 2023.
Claims priority of provisional application 62/141,084, filed on Mar. 31, 2015.
Prior Publication US 2023/0159765 A1, May 25, 2023
Int. Cl. C09D 5/08 (2006.01); C09D 5/03 (2006.01); C09D 163/00 (2006.01); C23C 22/56 (2006.01); C23F 11/08 (2006.01); C23F 11/14 (2006.01); C23F 11/16 (2006.01); C23F 11/18 (2006.01)
CPC C09D 5/086 (2013.01) [C09D 5/038 (2013.01); C09D 5/084 (2013.01); C09D 163/00 (2013.01); C23C 22/56 (2013.01); C23F 11/08 (2013.01); C23F 11/149 (2013.01); C23F 11/161 (2013.01); C23F 11/162 (2013.01); C23F 11/165 (2013.01); C23F 11/18 (2013.01); C23F 11/185 (2013.01)] 22 Claims
OG exemplary drawing
 
1. A method of protecting a substrate from corrosion, comprising:
applying a corrosion inhibitor composition to a surface of a substrate, wherein the corrosion inhibitor composition comprises:
at least one metal salt or mixed metal salt, wherein the metal is Ce; and
at least one corrosion inhibiting agent selected from an organic heterocyclic compound of Formula 1:

OG Complex Work Unit Chemistry
wherein:
A is fused with one or more aryl or heteroaryl rings to form a purine ring, wherein the purine ring is optionally substituted with one or more substituents, wherein a dotted line represents one or more optional double bonds;
Y1 is selected from the group consisting of S or SH, wherein the dotted line represents a double bond when Y1 is S or is absent when Y1 is SH;
X1 is selected from the group consisting of N and NH;
X2 is selected from the group consisting of N and NR5; and
R5 is selected from the group consisting of hydrogen, amino, C1-C10alkyl, C2-C10alkenyl, C2-C10alkynyl, aryl, and heteroaryl, wherein amino, alkyl, alkenyl, alkynyl, aryl, or heteroaryl is optionally substituted.