Methods for inhibiting corrosion in aqueous media

US8021607B2 · kind B2 · utility

Assignee

• General Electric Company · US

Inventors

• Claudia C. Pierce · Naperville, US
• Philip D. Deck · Ardsley, US
• Rosa Crovetto · Wayne, US
• Beena George · Bengaluru, IN
• Rajendra Prasad Kalakodimi · Richmond, US
• Guruprasad Sundararajan · Savanuru, IN
• Donald Wayne Whisenhunt, Jr. · Schenectady, US

Key dates

• Filing date: Oct 31, 2008
• Grant date: Sep 20, 2011
• Expiry date: Jun 29, 2029

Classification

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

Abstract

Methods are provided to inhibit corrosion of metals in contact with aqueous systems such as cooling water systems. In accordance with the methods, a hydroxyacid compound and orthophosphates are used to treat the system. Additionally, an adjuvant including poly(epoxysuccinic acids), an additional hydroxy acid, and a polycarboxylic acid, may be added to the system water.