Polyurea treatment method for metallic corrosion protection
AssigneeKing Fahd University of Petroleum and Minerals
InventorsIsmail Abdulazeez, Othman Al-Hamouz, Abdulaziz Al-Saadi, Mazen Khaled
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Abstract
Methods for preventing, inhibiting, or reducing metal (e.g. mild steel) corrosion in aqueous media utilizing a water-soluble formulation having a polyurea pre-dissolved in a polar aprotic solvent are described. The polyurea contains reacted units of a diisocyanate and a diaminoalkane. The effectiveness of the methods is demonstrated by corrosion inhibition efficiency and corrosion rate of metallic substrates in aqueous acidic environments using the water-soluble formulation.
Claims11
Polyurea treatment method for corrosion protection of a metallic substrate in contact with an aqueous corrosive medium, comprising:
- dissolving particles of a polyurea in a polar aprotic solvent selected from the group consisting of N-methyl-2-pyrrolidone, dimethylformamide, dimethyl sulfoxide, and 1,3-dimethyl-2-imidazolidinone to form a treatment mixture;
- mixing the treatment mixture with the aqueous corrosive medium in contact with the metallic substrate,
- wherein the treatment mixture is devoid of epoxy ester resin;
- and
- the polyurea comprises reacted units of a diaminoalkane and a diisocyanate.
Dependencies are inferred from the claim text.