US 11,753,590 B2
Polyurea treatment method for metallic corrosion protection
Ismail Abdulazeez, Dhahran (SA); Othman Al-Hamouz, Dhahran (SA); Abdulaziz Al-Saadi, Dhahran (SA); and Mazen Khaled, Dhahran (SA)
Assigned to King Fahd University of Petroleum and Minerals, Dhahran (SA)
Filed by King Fahd University of Petroleum and Minerals, Dhahran (SA)
Filed on May 27, 2022, as Appl. No. 17/826,287.
Application 17/826,287 is a continuation of application No. 16/361,355, filed on Mar. 22, 2019, granted, now 11,377,595.
Prior Publication US 2022/0290051 A1, Sep. 15, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. C09K 15/20 (2006.01); C23F 11/14 (2006.01)
CPC C09K 15/20 (2013.01) [C23F 11/147 (2013.01)] 11 Claims
1. 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.