Cathodic Protection
For Offshore Platforms

An introduction

Deepwater Corrosion Services provides cathodic protection for new structures and anode replacement or supplementation for aging offshore assets. Having rewritten the "CP retrofit textbook" with our ground-breaking anode replacement systems, Deepwater can retrofit a structure's cathodic protection system more quickly and more efficiently, reducing the cost to the operator by up to 40% over traditional methods. When the majority of the world's offshore infrastructure is beginning to reach the end of it's original design life, it is more important than ever to address corrosion control and cathodic protection for valuable offshore assets. Our anti-corrosion specialists have provided, supplemented, or replaced the cathodic protection on every type of brown or green-field asset currently in operation, many prematurely, due to unforeseen corrosion problems. No one has retrofitted cathodic protection on as many structures as Deepwater.

For new platforms, we provide stock platform anodes , made at one our two certified ISO 9000 anode foundries: Deepwater Gaus (Houston, TX) and Deepwater MPE (Indonesia). Having access to our own raw materials for all of the aluminum and zinc anodes in our systems allows us to ensure the highest quality alloys on the market.

For sacrificial retrofit situations, where impressed current cathodic protection (ICCP) is not an option, we usually recommend the RetroPod (including the RetroClamp) system, due to its continued track record of success in the Gulf of Mexico and elsewhere.

For most anode retrofit projects, where a larger structure or complex of structures can require significant amounts of cathodic protection, we recommend the RetroBuoy ICCP retrofit system. Providing up to 400 Amps of CP for 25 years, it is the most effective and efficient anode sled on the market.

At the same time that the new anodes are installed on a structure, we recommend also that our customers opt for a retrofit cathodic protection monitoring system. This helps to more easily verify continuity at installation and also to monitor system performance for the life of the new design. Platform monitoring can even be done remotely.

Related Technical Information

Offshore Cathodic Protection 101 (Paper)

(2007) by R Baxter, J Britton (DWC In-House) Abstract: A brief tutorial about the science of cathodic protection as it pertains to the offshore oil & gas industry, complete with diagrams, chemical equations etc.

Offshore CP System Management: A 21st Century Approach (Paper)

(2004) by J N Britton Abstract: As offshore structures around the world are aging and in many cases reaching the end of their useful lives, operators are looking for ways to reduce costs on subsea maintenance programs ...

Impressed Current CP Retrofits: The Good, Bad & the Ugly (Paper)

(2001) by J N Britton (from Corrosion 2001) Abstract: It has long been recognized that an impressed current design can offer significant economic advantages over galvanic anodes on certain types of offshore platforms that require a cathodic protection retrofit ...

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Platform Cathodic Protection Products