Enquire / contact me

Phase Corrosion Inhibitors for UAE Offshore Platforms

Equipment & Services

Cortec's ready-to-use waterborne corrosion inhibitor VpCI®-337 BD was used by Abu Dhabi Marine Operating Company for Protection of Offshore Platform Caisson Legs

Phase Corrosion Inhibitors for UAE Offshore Platforms
Phase Corrosion Inhibitors for UAE Offshore Platforms
Phase Corrosion Inhibitors for UAE Offshore Platforms
Phase Corrosion Inhibitors for UAE Offshore Platforms

Abu Dhabi Marine Operating Company is a major producer of oil and gas from the offshore areas of Abu Dhabi in the United Arab Emirates. This large UAE oil company operates multiple barge-type offshore platforms constructed on caisson legs. Gas build-up inside the confined compartment around an offshore platform caisson leg led to an explosion. The gas was found to be hydrogen generated by the depleted anodes inside the caisson leg. An investigation of the fatal explosion made several recommendations, including removal of the anodes, biocide-treated water and blasting grit that had accumulated inside the caisson legs over two decades. 

Internals of the platform caisson legs were left uncoated and filled with biocide-treated water and protected using suspended sacrificial anodes. Over time the anodes depleted and an alternative environmentally friendly method of protecting caisson legs was recommended. 

A successful pilot study was conducted to evaluate the use of a Cortec's Vapor Phase Corrosion Inhibitors and the system was adopted for rectification of the problem. The final recommendation was corrosion management utilizing Vapor Phase Corrosion Inhibitor (VpCI®). To assess the effectiveness of this approach, a pilot project was launched in 2009 whereby one caisson leg was emptied and preserved with VpCI®. Carbon steel weight loss corrosion coupons were used to assess the effectiveness of this approach.

Unlike traditional contact corrosion inhibitors, VpCI® ’s have a moderately high vapor pressure that allows them to function in the vapor phase without applying VpCI® directly to the metal surface. Therefore, VpCI®’s provide protection in the liquid phase, vapor phase, and critical interphase. They access the most difficult to reach spaces and provide effective protection against crevice corrosion.

Within the preservation process, Cortec's ready-to-use waterborne corrosion inhibitor VpCI®-337 BD was used primarily for robust prevention of internal void spaces while simultaneously preventing bio-growth. The inhibitor was sprayed in the caisson legs to stop bio-growth.  After that water-soluble, biodegradable powder VpCI®-609 S was fogged in to the void space to counter dead volume of water at the bottom.  Custom manufactured strips of Cortec’s easy to use EcoPouch were then suspended from the top side for additional protection.  EcoPouches are filled with VpCI®-609 powder and constructed from breathable Tyvek®, which allows the 

VpCI® molecules to be emitted through the membrane and form a molecular layer on metal surfaces providing corrosion protection.

The results showed strong improvement in the VpCI®- treated caisson leg where corrosion rates were maintained at low rates that were deemed acceptable. The methodology was adopted for the treatment of all other caisson legs at the complex. After two years, the pilot project was deemed a success and Cortec® VpCI® inhibitors were proven to effectively mitigate corrosion in an offshore environment by reducing the corrosion rate in the protected leg Vs the control by 584%.  

Posted on September 23, 2016 - (315 views)
Cortec® Europe Advertising Agency
Ivana Lucica 5
10000 Zagreb - Croatia
+385-14-854595
+385-14-854501
View full company profile
Location
Related articles
Hydraulic Hose Series Dynamax EC881
SIL2/PLd Safety Controllers
Calibration System for Torques
LED Technology
Tube Forming System
Pushing the Boundaries of Lubrication Demand
Cable Glands for Hazardous Areas
How to Evaluate Chemically Resistant Adhesives
Custom Filter Housing
Industrial Vacuum IVS 100
Electrical Explosion Protection Equipment
Hannay Reels is the Reel Leader
Hannay Reels: The Reel Leader
Pneumatic Stopper - Deflated and Inflated
Reliable Rust-Resistant Reels
The Italian Manufacturer of Rupture Discs
Cable Reels and Hose Reels
Pneumatic Stopper Type FOG/SC
Electrical Explosion Protection Equipment
The World‘s Largest O-ring Warehouse
The Italian Manufacturer of Rupture Discs
Thermally Conductive Epoxy
Fuelling Oil & Gas Rebirth
Pneumatic Stoppers
Dyneo® Motor Drive Assembly for Higher Efficiency Levels
Electrical Explosion Protection Equipment
Ion Exchange Resins (IEN): A Fundamental Component for Pharmaceutical Manufacturing
Rupture Discs SCR
Storage Cabinets
Remote area lighting systems Peli 9480 and 9490
Flameless Venting
Clean Room Station
Compressors Control Unit
European Plant with Boosted Process Equipment Manufacturing Capability
Air Operated Hoists Profi TI
Eco-Friendly Lubricants
Adhesives for the Medical Industry
Natural Gas Engine Oil Lubricants
Explosion Protection and Process Safety
Corrosion solution