Below you will find a presentation on cathodic protection (CP) by distributed sacrificial anodes (DSA) we recently gave at CORROSION 2017. In this project, we worked together with my colleagues Lars Årtun and Prof. Roy Johnsen, as well as our M.Sc. student Geir Quale.
We are currently preparing a peer-reviewed article that will explain the concept in more detail. In short, CP by DSA, a term coined by Lars, is a clever way to reimagine sacrificial CP. As you will see in the presentation, DSA relies on converting cathode area to anode area by distributing anode mass over the surface in need of cathodic protection.
The consequence is a staggering 90-92% reduction in required anode mass, which could translate to more than a 500,000kg weight saving when extended to an entire subsea production system. CP by DSA, then, represents one of the largest, most promising, and low risk weight optimization opportunities!
Distributed sacrificial anodes – Presentation
Quale, G., Iannuzzi, M, Årtun, L, and Johsen, R. “Cathodic protection by distributed sacrificial anodes – A new cost-effective solution to prevent corrosion of subsea structures.” CORROSION 2017, paper no. C2017-8941 (NACE International, Houston, TX, March 26-30, 2017.)