Laboratory and Field Characterization of a New Sacrificial Anode for Cathodic Protection of Offshore Structures

CORROSION ◽  
1998 ◽  
Vol 54 (12) ◽  
pp. 1018-1025 ◽  
Author(s):  
S. Rossi ◽  
P. L. Bonora ◽  
R. Pasinetti ◽  
L. Benedetti ◽  
M. Draghetti ◽  
...  
Keyword(s):  
Cathodic Protection ◽  
Offshore Structures ◽  
Sacrificial Anode

BEM Numerical Modeling and Experimental Verification of Cathodic Protection for Offshore Structures

2011 ◽  
Vol 339 ◽  
pp. 617-623
Author(s):  
Zhi Gang Lan ◽  
Bao Rong Hou ◽  
Xiu Tong Wang
Keyword(s):  
Numerical Modeling ◽  
Boundary Element Method ◽  
Boundary Element ◽  
Computer Modeling ◽  
Cathodic Protection ◽  
Experimental Verification ◽  
Offshore Structures ◽  
Sacrificial Anode ◽  
Test Pool ◽  
Good Agreement

The progresses and theoretical methodology of computer modeling of cathodic protection using the boundary element method (BEM) are outlined. To test the effectiveness and accuracy of BEM numerical modeling of cathodic protection for offshore structures, a miniature model offshore jacket with a sacrificial anode was built and put in a test pool full of seawater. Cathodic protection potentials on different positions were measured and compared with the values obtained from computer modeling. The results show good agreement between measured value and numerical simulated value. The factors that led to discrepancy in the two groups of data were discussed.

Characterization of Al-Zn-Sn as Sacrificial Anodes to Protect Underground Oil Pipelines in Al-Hilla Regional

2012 ◽  
Vol 628 ◽  
pp. 135-143
Author(s):  
Kadhim F. Al-Sultani ◽  
Jenan Nasser Nabat
Keyword(s):  
Aluminum Alloys ◽  
Cathodic Protection ◽  
Steel Sample ◽  
Sacrificial Anode ◽  
Sacrificial Anodes ◽  
Oil Pipelines ◽  
Protection Potential ◽  
Pass Through ◽  
Selection Of

Sacrificial anode cathodic protection is one of the most widely used methods in protecting buried oil pipe lines against the corrosion damages. In the present work, a series of Aluminum alloys have been prepared as sacrificial anodes candidates to be used in the protection of the oil pipelines that pass through the Al-Hilla region. These prepared alloys were microstructurally and electrochemically characterized to evaluate their performance as Al-sacrificial anodes for cathodic protection of oil pipes The relationships between the protection potential with time, sacrificial anode life, discharge currents, and capacity of sacrificial anodes were found, taking into consideration the distance between sacrificial anode and protected steel sample. According to the results obtained, the best selection of sacrificial anodes was (Al-4% Zn-0.5% Sn) alloy at 30cm in Al-Hilla region.

scholarly journals Comparative efficiency of different realization methods of cathodic protection for marine structures

2021 ◽  
Vol 225 ◽  
pp. 04001
Author(s):  
Boris Borisovich Chernov ◽  
Van Mung Vu ◽  
Anas Maskharovich Nugmanov
Keyword(s):  
Cathodic Protection ◽  
Offshore Structures ◽  
Battery Life ◽  
Sacrificial Anode ◽  
Solar Panels ◽  
Power Sources ◽  
Comparative Efficiency ◽  
Impressed Current ◽  
The Cost ◽  
Impressed Current Cathodic Protection

Economic efficiency in using the solar panels as the DC sources for the impressed current cathodic protection of offshore structures was compared with the sacrificial anode cathodic protection. The calculation was based on the example of a sheet pile wall with a surface area of 2000 m2 protected by various methods of cathodic protection: the impressed current cathodic protection powered by a rectifier device, by solar panels with batteries, by solar panels without batteries and sacrificial anode cathodic protection. The results showed that the cost of impressed current cathodic protection powered by solar panels without batteries is the lowest after 10 years of operation. Cathodic protection powered only by solar panels without batteries is the most beneficial in cold climates when battery life is reduced, and for facilities that are remote from centralized power sources, where the power supplying cost to the protected structure is difficult to estimate due to specific situations.

Cathodic Protection Design Consideration for an Offshore Flexible Riser Connected to an Impressed Current System

2021 ◽  
Author(s):  
Thierry Dequin ◽  
Clark Weldon ◽  
Matthew Hense
Keyword(s):  
Cathodic Protection ◽  
Sacrificial Anode ◽  
Flexible Riser ◽  
Flexible Pipe ◽  
Linear Resistance ◽  
Flexible Pipes ◽  
Flexible Risers ◽  
Impressed Current ◽  
Host Structure ◽  
Impressed Current Cathodic Protection

Abstract Flexible risers are regularly used to produce oil and gas in subsea production systems and by nature interconnect the subsea production system to the floating or fixed host facilities. Unbonded flexible pipes are made of a combination of metallic and non-metallic layers, each layer being individually terminated at each extremity by complex end fittings. Mostly submerged in seawater, the metallic parts require careful material selection and cathodic protection (CP) to survive the expected service life. Design engineers must determine whether the flexible pipe risers should be electrically connected to the host in order to receive cathodic protection current or be electrically isolated. If the host structure is equipped with a sacrificial anode system, then electrical continuity between the riser and the host structure is generally preferred. The exception is often when the riser and host structure are operated by separate organizations, in which case electrical isolation may be preferred simply to provide delineation of ownership between the two CP systems. The paper discusses these interface issues between hull and subsea where the hull is equipped with an impressed current cathodic protection (ICCP) system, and provides guidance for addressing them during flexible pipe CP design, operation, and monitoring. Specifically, CP design philosophies for flexible risers will be addressed with respect to manufacturing, installation and interface with the host structure’s Impressed Current Cathodic Protection (ICCP) system. The discussion will emphasize the importance of early coordination between the host structure ICCP system designers and the subsea SACP system designers, and will include recommendations for CP system computer modeling, CP system design operation and CP system monitoring. One of the challenges is to understand what to consider for the exposed surfaces in the flexible pipes and its multiple layers, and also the evaluation of the linear resistance of each riser segment. The linear resistance of the riser is a major determinant with respect to potential attenuation, which in turn largely determines the extent of current drain between the subsea sacrificial anode system and the hull ICCP system. To model the flexible riser CP system behavior for self-protection, linear resistance may be maximized, however the use of a realistic linear resistance is recommended for evaluation of the interaction between the host structure and subsea system. Realistic flexible linear resistance would also reduce conservatism in the CP design, potentially save time during the offshore campaign by reducing anode quantities, and also providing correct evaluation of drain current and stray currents.

Development of Al-5%Zn-0.5%Sn-2.6%Mg Alloy as Sacrificial Anode for Cathodic Protection of Steel in 3 wt.% NaCl Solution

2021 ◽  
Author(s):  
Cilya Oulmas ◽  
Sonia Mameri ◽  
Dalila BOUGHRARA ◽  
Slimane Bouterfaia ◽  
Joseph Delhalle ◽  
...  
Keyword(s):  
Cathodic Protection ◽  
Mg Alloy ◽  
Sacrificial Anode ◽  
Nacl Solution

scholarly journals Sacrificial Anode Cathodic Protection of Steel in Tap Water

2005 ◽  
Vol 54 (10) ◽  
pp. 488-493
Author(s):  
Yoshikazu Miyata ◽  
Shukuji Asakura ◽  
Yasuki Matsukawa ◽  
Mamoru Miyashita ◽  
Toshihiko Sudo
Keyword(s):  
Cathodic Protection ◽  
Tap Water ◽  
Sacrificial Anode
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