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US 12,590,256 B2Granted
Corrosion inhibitor formulations based on compounds with both pyridinium and hydroxy substituents
AssigneeSaudi Arabian Oil Company
InventorsMuhammad Imran Ul-haq, Nayef M. Alanazi, Turki M. Al Abeedi, Abdullah Al-Malki, Faisal M. Al-Mutahhar
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Abstract
Compounds for inhibiting corrosion are provided that include a pyridinium substituent and a hydroxy substituent. Also provided are methods of making the compounds. Also provided are corrosion inhibitor formulations including the compounds. Also provided are processes for inhibiting corrosion of a metallic surface using the corrosion inhibitor formulations.
Claims6
A formulation comprising:
- a compound for inhibiting corrosion;
- a synergist;
- a nonionic surfactant;
- an imidazoline;
- a secondary solvent;
- a coupling agent;
- an ethoxylated amine;
- and water, the compound comprising:
- or a salt thereof, where:
- R1, R2, R3, R4, and R5 are independently hydrogen;
- and
- R6 is an substituted C5 to C15 alkyl;
- and
- wherein the synergist comprises thioglycollic acid, 2-mercaptoethanol, or a mixture thereof;
- and
- wherein the formulation comprises:
- from 5 to 25 weight percent of the compound;
- from 1 to 10 weight percent imidazoline;
- from 40 to 90 weight percent water;
- and
- 0.1 parts per million to 100 parts per million of the compound.
18 more elements
Dependencies are inferred from the claim text.