Compositions for inhibiting corrosion
AssigneesThe Boeing Company, Commonwealth Scientific and Industrial Research Organisation
InventorsJames Ivan Mardel, Ivan Stewart Cole, Paul Andrew White, Anthony Ewart Hughes, Tracey Anne Markley, Timothy Graham Harvey, Joseph Osborne, Erik Ivan Sapper
Life of this patent
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Abstract
The present disclosure relates to agents, compositions, and methods for inhibiting corrosion in various substrates, for example in metal substrates. The present disclosure also relates to compositions for inhibiting corrosion comprising at least one organic heterocyclic compound and at least one metal salt or mixed metal salt selected from rare earth, alkali earth and transition metals.
Claims23
A method 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 selected from the group consisting of Zn, La, Pr, Ce, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Co, Y, Sc, Zr, and combination(s) thereof;
- and
- at least one corrosion inhibiting agent selected from an organic heterocyclic compound of Formula 1:
- wherein:
- A is fused with one or more aryl or heteroaryl rings to form a benzimidazole, wherein the 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;
- 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;
- and
- the corrosion inhibitor composition is encapsulated by a permeable polymer film, wherein the permeable polymer film is configured to permit controlled diffusion of the corrosion inhibitor composition.
A composition comprising:
- at least one metal salt or mixed metal salt, wherein the metal is selected from the group consisting of Zn, La, Pr, Ce, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Co, Y, Sc, Zr, and combination(s) thereof;
- and
- at least one corrosion inhibiting agent selected from an organic heterocyclic compound of Formula 1:
- wherein:
- A is fused with one or more aryl or heteroaryl rings to form a benzimidazole, wherein the 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;
- 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;
- and
- the composition is encapsulated by a permeable polymer film, wherein the permeable polymer film is configured to permit controlled diffusion of the composition.
Dependencies are inferred from the claim text.