Invention Grant
- Patent Title: Use of multiple charged cationic compounds derived from polyamines and compositions thereof for corrosion inhibition in a water system
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Application No.: US16554972Application Date: 2019-08-29
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Publication No.: US11359291B2Publication Date: 2022-06-14
- Inventor: Ashish Dhawan , Jeremy Moloney , Carter M. Silvernail
- Applicant: ECOLAB USA INC.
- Applicant Address: US MN Saint Paul
- Assignee: ECOLAB USA INC.
- Current Assignee: ECOLAB USA INC.
- Current Assignee Address: US MN Saint Paul
- Agency: McKee, Voorhees & Sease PLC
- Main IPC: C23F11/14
- IPC: C23F11/14 ; C02F5/12 ; C23F11/10 ; C23F11/173 ; C09K8/54 ; C02F103/02

Abstract:
Disclosed here are the methods of using one or more multiple charged cationic compounds in a corrosion control composition to reduce corrosion of metal surfaces in a water system. The multiple charged cationic compounds are derived from polyamines through a ring-opening reaction with an epoxide or two reactions: an aza-Michael addition with an activated olefin having a cation group and a ring-opening reaction with an epoxide. The disclosed methods or compositions are found to be effective than those methods or compositions including commonly used corrosion inhibitors for water systems.
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