Wear indicator system for offshore corrosion protection covering systems

US10288208B2 · kind B2 · utility

Assignee

• EVONIK DEGUSSA GMBH · DE

Inventors

• Jan Berger · Oslo, NO
• Harald Haeger · Thedinghausen, DE
• Markus Hartmann · Mauerstetten, DE
• Jasmin Berger · Dortmund, DE

Key dates

• Filing date: Jun 14, 2016
• Grant date: May 14, 2019
• Expiry date: Apr 1, 2037

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/727
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A corrosion protected metal pipe for installation in an offshore structure or for producing a pipeline laid in water is provided. The metal pipe has an at least two-layer covering on the pipe with a lower layer facing the pipe and an upper layer on a side of the lower layer not facing the pipe is provided. The layers are formed such that the lower layer is electrically conductive and the upper layer is electrically insulating, the lower layer is optically contrasting to the upper layer, or the lower layer is electrically conducting and optically contrasting to the upper layer and the upper layer is electrically insulating. Thus, in the event of damage to the layer or layers lying above, a visual or electrical signal can be detected. Damage to the corrosion protection covering can therefore be detected easily and, if appropriate, reported by remote monitoring.