2-substituted imidazole and benzimidazole corrosion inhibitors

US11306400B2 · kind B2 · utility

Assignee

• ECOLAB USA INC. · US

Inventors

• Deepak Rane · Mumbai, IN
• Jothibasu Seetharaman · Nellikkuppam, IN
• Jeffery M. Atkins · Aurora, US
• Anand Harbindu · Pune, IN
• Piyush Anant · Bachra, IN
• Vaideeswaran Sivaswamy · Pune, IN
• Pradeep Cheruku · Bolingbrook, US

Key dates

• Filing date: Dec 19, 2018
• Grant date: Apr 19, 2022
• Expiry date: Aug 19, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C23F11/173
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

Disclosed are methods of using nitrogen-containing compounds as corrosion inhibitors. The present method is used to inhibit corrosion of a metal surface in contact with an aqueous system using 2-substituted imidazoles and 2-substituted benzimidazoles, and provides enhanced protection against corrosion of metals in the aqueous system. The method comprises the use of corrosion inhibitors that are generally resistant to halogen attack and provide good corrosion resistance in the presence of oxidizing halogen-based biocides. Formulations comprising 2-substituted imidazoles and 2-substituted benzimidazoles are also disclosed.