Corrosion inhibition compositions and associated methods for inhibiting corrosion on metallic substrates

The corrosion inhibition composition comprising:

• a carrier;
• and
• a Schiff base in admixture with the carrier, the carrier comprising at least one of water, a hydrocarbon solvent, and a binder,
• wherein the Schiff base is selected from the group consisting of (E)-N-methyl-2-(5-methylfuran-2-yl)methylene)hydrazine-1-carbothioamide, (E)-2-((5-methylfuran-2-yl)methylene)hydrazine-1-carbothioamide, (2E)-N-methyl-2-(3-phenylallylidene)hydrazine-1-carbothioamide, (E)-2-(4-isopropylbenzylidene)-N-methylhydrazine-1-carbothioamide, (E)-2-(4-isopropylbenzylidene)hydrazine-1-carbothioamide, (2E)-2-(3-phenylallylidene)hydrazine-1-carbothioamide, and mixtures thereof, or
• wherein the Schiff base is selected from the group consisting of(E)-1-(5-methylfuran-2-yl)-N-(4H-1,2,4-triazol-4-yl)methanimine, (E)-4-Hydroxy-N′-((5-methylfuran-2-yl)methylene)benzohydrazide, (E)-N′-((5-methylfuran-2-yl)methylene)benzohydrazide, (E)-2-((5-methylfuran-2-yl)methylene)hydrazine-1-carboxamide, (E)-1-phenyl-N-(4H-1,2,4-triazol-4-yl)methanimine, 4-Hydroxy-N′-[(E)-phenylmethylidene]benzohydrazide, (E)-N′-benzylidenebenzohydrazide, 4-hydroxy-N′-((1E)-3-phenylallylidene)benzohydrazide, N′-((1E)-3-phenylallylidene)benzohydrazide, (E)-1-(4-Ethylphenyl)-N-(4H-1,2,4-triazol-4-yl)methanimine, (E)-N′-(4-ethylbenzylidene)-4-hydroxybenzohydrazide, E (E)-N′-(4-ethylbenzylidene)benzohydrazide, (E)-1-[4-(propan-2-yl)phenyl]-N-(4H-1,2,4-triazol-4-yl)methanimine, 4-Hydroxy-N′-[(E)-[4-(propan-2-yl)phenyl]methylidene]benzohydrazide, N′-[(E)-[4-(propan-2-yl)phenyl]methylidene]benzohydrazide, (E)-2-(4-isopropylbenzylidene)hydrazine-1-carboxamide, (E)-1-(4-isopropylbenzylidene)urea, and mixtures thereof.

A method for inhibiting corrosion on a metallic substrate, the method comprising:

• applying to the metallic substrate a corrosion inhibition composition comprising a Schiff base,
• wherein the corrosion inhibition composition further comprises a carrier, wherein the carrier comprises a polymeric binder, and wherein:
• (a) the Schiff base comprises a thiosemicarbazone;
• (b) the Schiff base is selected from the group consisting of (E)-N-methyl-2-((5-methylfuran-2-yl)methylene)hydrazine-1-carbothioamide, (E)-2-((5-methylfuran-2-yl)methylene)hydrazine-1-carbothioamide, (2E)-N-methyl-2-(3-phenylallylidene)hydrazine-1-carbothioamide, (E)-2-(4-isopropylbenzylidene)-N-methylhydrazine-1-carbothioamide, (E)-2-4-isopropylbenzylidene)hydrazine-1-carbothioamide, (2E)-2-(3-phenylallylidene)hydrazine-1-carbothioamide, and mixtures thereof;
• (c) the Schiff base is selected from the group consisting of (E)-1-(5-methylfuran-2-yl)-N-(4H-1,2,4-triazol-4-yl)methanimine, (E)-4-Hydroxy-N′-((5-methylfuran-2-yl)methylene)benzohydrazide, (E)-N′-((5-methylfuran-2-yl)methylene)benzohydrazide, (E)-2-((5-methylfuran-2-yl)methylene)hydrazine-1-carboxamide, (E)-1-phenyl-N-(4H-1,2,4-triazol-4-yl)methanimine, 4-Hydroxy-N′-[(E)-phenylmethylidene]benzohydrazide, (E)-N′-benzylidenebenzohydrazide, 4-hydroxy-N′-((1E)-3-phenylallylidene)benzohydrazide, N′-((1E)-3-phenylallylidene)benzohydrazide, (E)-1-(4-Ethylphenyl)-N-(4H-1,2,4-triazol-4-yl)methanimine, (E)-N′-(4-ethylbenzylidene)-4-hydroxybenzohydrazide, E (E)-N′-(4-ethylbenzylidene)benzohydrazide, (E)-1-[4-(propan-2-yl)phenyl]-N-(4H-1,2,4-triazol-4-yl)methanimine, 4-Hydroxy-N′-[(E)-[4-(propan-2-yl)phenyl]methylidene]benzohydrazide, N′-[(E)-[4-(propan-2-yl)phenyl]methylidene]benzohydrazide, (E)-2-(4-isopropylbenzylidene)hydrazine-1-carboxamide, (E)-1-(4-isopropylbenzylidene)urea, and mixtures thereof;
• or
• (d) the Schiff base comprises the following structure:
• wherein the R2 is one of an alkyl, an aryl/substituted aryl, and a heterocyclic/substituted heterocyclic group, wherein the R is one of a hydrogen, an aryl/substituted aryl, and an alkyl group, and wherein the R1 is one of a hydrogen, an aryl/substituted aryl, and an alkyl group.