Method of inhibiting corrosion in aqueous systems

US4749550A · kind A · utility

Assignee

• The British Petroleum Company p.l.c. · GB

Inventors

• Brian Peter Forsyth Goldie
• John J. McCarroll · Camberley, GB

Key dates

• Filing date: Dec 23, 1986
• Grant date: Jun 7, 1988
• Expiry date: Dec 23, 2006

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C23F11/18
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A method of inhibiting corrosion of a metal surface in an aqueous system comprising introducing corrosion inhibiting cations into the aqueous system. The corrosion inhibiting cations are selected from the group comprising cations of yttrium and cations of the metals of the lanthanum series which metals have atomic numbers from 57 to 71 inclusive. The cations may be introduced in the form of water soluble salts. Alternatively the cations may be releasably bound by ion exchange to a substrate and the ion-exchanged substrate introduced into the aqueous system.