Purine-based corrosion inhibitors

US10669637B2 · kind B2 · utility

Assignee

• ECOLAB USA INC. · US

Inventors

• Anand Harbindu · Pune, IN
• Jothibasu Seetharaman · Nellikkuppam, IN
• Deepak Rane · Mumbai, IN
• Vaideeswaran Sivaswamy · Pune, IN

Key dates

• Filing date: May 27, 2016
• Grant date: Jun 2, 2020
• Expiry date: Nov 15, 2037

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C02F2303/08
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

Disclosed are methods of using biodegradable heterocyclic compounds of relatively low toxicity as corrosion inhibitors. The present method is used to inhibit corrosion of a metal surface in contact with an aqueous system using compounds comprising a purine structure, and provides enhanced protection against corrosion of metals in aqueous systems. 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 purine-based compounds are also disclosed.