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

51318-11106-CATHODIC PROTECTION BY DISTRIBUTED SACRIFICIAL ANODES – ELEVATED TEMPERATURE MUD AND MARINE ATMOSP

Picture for CATHODIC PROTECTION BY DISTRIBUTED SACRIFICIAL ANODES – ELEVATED TEMPERATURE MUD AND MARINE ATMOSPHERE
Available for download

Conventional thermal sprayed aluminum (TSA), as well as distributed sacrificial anodes (DSA) – in the form of a single-layer metallic coating - were exposed in seawater at 50 °C and 80°C and in mud. Results are discussed.

Product Number: 51318-11106-SG
Author: Audun Ryen / Roy Johnsen / Mariano Iannuzzi / Lars Årtun
Publication Date: 2018
Industry: Science of Corrosion
$0.00
$20.00
$20.00

Thermal Spray Aluminum (TSA) can be used to reduce anode demand or to extend anode life on projects with long design lives (i.e., 40 to 50 years). However, for subsea structures, TSA has not been used to replace the functionality of sacrificial anodes. In conventional CP design, TSA should not degrade while it remains connected to the CP system, draining current from sacrificial anodes, which ensure adequate cathodic protection.

During the CORROSION 2017 conference, a new concept named CP by distributed sacrificial anodes (DSA) was presented.1 The main principle was to convert the cathode area to anode area by distributing anode mass over the surface of the equipment to be protected. CP by DSA is achieved by the deposition of a single-layer metallic coating. In this work, DSA was applied by thermal spray (TS). DSA reduces the total exposed cathode area to small defects and imparts active cathodic protection.

In previous work, the outcome of exposure testing in flowing natural seawater at 10°C was discussed. In this paper, exposure in seawater at 50 °C and 80°C and in mud, are discussed. Freely exposed samples thermally sprayed with DSA and conventional TSA as well as galvanic couplings between DSA and both TSA and carbon steel were investigated.

Keywords; thermal sprayed aluminum, distributed sacrificial anode, seawater, mud, corrosion, cathodic polarization

Thermal Spray Aluminum (TSA) can be used to reduce anode demand or to extend anode life on projects with long design lives (i.e., 40 to 50 years). However, for subsea structures, TSA has not been used to replace the functionality of sacrificial anodes. In conventional CP design, TSA should not degrade while it remains connected to the CP system, draining current from sacrificial anodes, which ensure adequate cathodic protection.

During the CORROSION 2017 conference, a new concept named CP by distributed sacrificial anodes (DSA) was presented.1 The main principle was to convert the cathode area to anode area by distributing anode mass over the surface of the equipment to be protected. CP by DSA is achieved by the deposition of a single-layer metallic coating. In this work, DSA was applied by thermal spray (TS). DSA reduces the total exposed cathode area to small defects and imparts active cathodic protection.

In previous work, the outcome of exposure testing in flowing natural seawater at 10°C was discussed. In this paper, exposure in seawater at 50 °C and 80°C and in mud, are discussed. Freely exposed samples thermally sprayed with DSA and conventional TSA as well as galvanic couplings between DSA and both TSA and carbon steel were investigated.

Keywords; thermal sprayed aluminum, distributed sacrificial anode, seawater, mud, corrosion, cathodic polarization

Product tags
Also Purchased
Picture for Distributed Sacrificial Cathodic Protection – A New Cost Effective Solution to Prevent Corrosion on
Available for download

Distributed Sacrificial Cathodic Protection – A New Cost Effective Solution to Prevent Corrosion on Subsea Structures

Product Number: 51317--8941-SG
ISBN: 8941 2017 CP
Author: Roy Johnsen
Publication Date: 2017
$20.00

In this paper, a new concept named CP by distributed sacrificial anodes (DSA) is presented. The main principle of CP by DSA is to convert cathode area to anode area by distributing anode mass over the surface of the equipment to be protected.
Picture for Effect of tungsten on the precipitation kinetics and localized corrosion resistance of super duplex
Available for download

51318-11105-Effect of tungsten on the precipitation kinetics and localized corrosion resistance of super duplex

Product Number: 51318-11105-SG
Author: Mia Bernås / Ida Westermann / Anders Jernberg, Atle H. Qvale / Roy Johnsen / Cristian Torres / Mariano Iannuzzi
Publication Date: 2018
$20.00

The effect of W on the precipitation kinetics of three 25Cr SDSS grades was quantified in Time-Temperature-Transformation (TTT) diagrams. Optical microscopy, scanning electron microscopy–energy dispersive X-ray spectroscopy (SEM–EDS), and Electron backscatter diffraction (EBSD) were used.
Picture for INTEGRATED CATHODIC PROTECTION (CP) SENSOR NETWORK – DEVELOPMENT OF THE CP SENSOR
Available for download

51318-11109-INTEGRATED CATHODIC PROTECTION (CP) SENSOR NETWORK – DEVELOPMENT OF THE CP SENSOR

Product Number: 51318-11109-SG
Author: Kristian K. Wold / Roy Johnsen / Mariano Iannuzzi / Lars Årtun /
Publication Date: 2018
$20.00

A new CP monitoring approach to quantify the health of the CP system in real-time with spatial resolution. Spatial resolution is achieved by an integrated sensor network distributed across a Subsea Production System.
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