Server maintenance is scheduled for Saturday, December 21st between 6am-10am CST.

During that time, parts of our website will be affected until maintenance is completed. Thank you for your patience.

Menu
Search
Filters
Close
Menu

00134 CATHODIC PROTECTION AT A SIMULATED DEPTH OF 2500m

Picture for 00134 CATHODIC PROTECTION AT A SIMULATED DEPTH
Available for download
Product Number: 51300-00134-SG
ISBN: 00134 2000 CP
Author: Alastair Tawns, Robin Oakley
$0.00
$20.00
$20.00
The hydrogen embrittlement and cathodic protection characteristics of several subsea pipeline and flexible riser / hose steels were investigated in simulated deepwater service conditions. Static four-point bending loads were combined with an impressed potential of-1.1 V Ag/AgCI, at a pressure of 250 bar in a synthetic seawater solution. The experiment applied a static load to welded pipeline steel specimens and un-welded flexible hose armour wire specimens by four point bending. Sacrificial cathodic protection from aluminium bracelet anodes was simulated by a multi-channel potentiostat. The specimens were immersed in synthetic seawater and pressurised to 250 bar, equivalent to 2500m depth. After 30 days in this test condition, none of the specimens had failed due to hydrogen embrittlement. Thick cathodic deposits had formed on all the specimens, but these proved much less effective at reducing the required cathodic current than deposits formed at atmospheric pressure. This would reduce the throwing capacity of the sacrificial anodes in deepwater. The stainless steels were less affected by the quality of the cathodic deposit than low alloy carbon steels, due to the properties of the oxide passive film. Keywords : Cathodic protection, ultra deep water simulated testing, hydrogen embrittlement, stainless steels, carbon steels.
The hydrogen embrittlement and cathodic protection characteristics of several subsea pipeline and flexible riser / hose steels were investigated in simulated deepwater service conditions. Static four-point bending loads were combined with an impressed potential of-1.1 V Ag/AgCI, at a pressure of 250 bar in a synthetic seawater solution. The experiment applied a static load to welded pipeline steel specimens and un-welded flexible hose armour wire specimens by four point bending. Sacrificial cathodic protection from aluminium bracelet anodes was simulated by a multi-channel potentiostat. The specimens were immersed in synthetic seawater and pressurised to 250 bar, equivalent to 2500m depth. After 30 days in this test condition, none of the specimens had failed due to hydrogen embrittlement. Thick cathodic deposits had formed on all the specimens, but these proved much less effective at reducing the required cathodic current than deposits formed at atmospheric pressure. This would reduce the throwing capacity of the sacrificial anodes in deepwater. The stainless steels were less affected by the quality of the cathodic deposit than low alloy carbon steels, due to the properties of the oxide passive film. Keywords : Cathodic protection, ultra deep water simulated testing, hydrogen embrittlement, stainless steels, carbon steels.
PRICE BREAKS - The more you buy, the more you save
Quantity
1+
5+
Price
$20.00
$20.00
Product tags
Also Purchased
Picture for 00132 USE AND MISUSE OF LABORATORY TESTS
Available for download

00132 USE AND MISUSE OF LABORATORY TESTS

Product Number: 51300-00132-SG
ISBN: 00132 2000 CP
Author: M.S. Cayard and J.G. Maldonado
$20.00
Picture for 00130 Effects of pH and PH2S on SSC Resistance of
Available for download

00130 Effects of pH and PH2S on SSC Resistance of Martensitic Stainless Steels

Product Number: 51300-00130-SG
ISBN: 00130 2000 CP
Author: Shuji HASHIZUME, Yasuto INOHARA and Katsumi MASAMURA
$20.00
Picture for 00138 WELDING NEW STAINLESS STEELS FOR THE
Available for download

00138 WELDING NEW STAINLESS STEELS FOR THE OIL AND GAS INDUSTRY

Product Number: 51300-00138-SG
ISBN: 00138 2000 CP
Author: T G Gooch
$20.00
Categories
Industry
Recently viewed
Popular tags
View all

Association for Materials Protection and Performance

© AMPP All Rights Reserved.
Membership Terms of Content Use
Contact Customer Support