scholarly journals FEATURES OF DOMESTIC REGULATORY FRAMEWORK GOVERNING CATHODIC PROTECTION OF HEATING NETWORKS AGAINST EXTERNAL CORROSION IN THE GROUND

2019 ◽  
Vol 21 (1-2) ◽  
pp. 77-86
Author(s):  
V. G. Kiselev ◽  
E. N. Ruzich
Keyword(s):  
Cathodic Protection ◽  
Systems Design ◽  
Electrochemical Protection ◽  
Metal Structures ◽  
Design For All ◽  
Protection Systems ◽  
Basic Parameters ◽  
External Corrosion ◽  
Cathodic Protection System ◽  
Heating Networks

Abstract: Paper provides comparative analysis of basic regulations governing design of systems of cathodic protection of underground metal structures against corrosion based on both Russian and international materials. The following basic parameters for evaluation of cathodic protection system performance are accepted: "need for applying cathodic protection systems", "values characterizing security of underground metal structures against corrosion in the presence of electrochemical protection", "density of protective current" and "magnitude of protective current". Carried out analysis identified the need to improve Russian system of cathodic protection systems design for all listed characteristics and above all in the direction of reducing the quantities of protective current and its density.

scholarly journals Features of Russian regulatory framework governing cathodic protection of heating networks against external corrosion in the ground

2019 ◽  
Vol 140 ◽  
pp. 05004
Author(s):  
Aleksandr Kalyutik ◽  
Vladimir Kiselev ◽  
Evgenij Ruzich ◽  
Andrey Kibarin
Keyword(s):  
Comparative Analysis ◽  
Current Density ◽  
Cathodic Protection ◽  
Regulatory Framework ◽  
Degree Of Protection ◽  
Protection Systems ◽  
Current Value ◽  
External Corrosion ◽  
Heating Networks

A comparative analysis of domestic and foreign documents governing the design of cathodic protection systems has been carried out. The main parameters for evaluating the effectiveness were selected: “protective current density”, “protective current value” and “indicators characterizing the degree of protection against corrosion in the presence of cathodic protection”. As a result, the need for improving the domestic system for designing cathodic protection installations was established. First of all, attention should be paid to the decrease in protective current, protective current density and criteria for determining the need for cathodic protection.

Operation and maintenance of Impressed Current Cathodic Protection systems on concrete civil structures

2018 ◽  
Author(s):  
Jacob Brink Jansson ◽  
Ruth Sørensen ◽  
Kirsten Riis
Keyword(s):  
Service Life ◽  
Cathodic Protection ◽  
Protection System ◽  
Civil Structures ◽  
Correct Operation ◽  
Operation And Maintenance ◽  
Number Of Factors ◽  
Protection Systems ◽  
Cathodic Protection System

Cathodic protection is a very well-known method of preventing or stopping reinforcement corrosion and thereby extending the service life of reinforced concrete civil structures. However, a number of factors, which among others are design, materials and components, installation methods, quality of workmanship, and operation and maintenance of the cathodic protection system, have influence on the functionality and effectivity of the cathodic protection system. The optimum design that fulfils the Client''s requirements to cost, traffic disruption, service life, etc. shall be determined in accordance with the structure layout and the ability of the Client''s organisation to conduct operation and maintenance. It is critical to ensure that all components are installed properly to achieve the expected service life of the system. Regular and correct operation and maintenance is also crucial to ensure the functionality and effectivity system.

THE CATHODIC PROTECTION SYSTEM OF PIPELINES WITH ANODIC EARTHING

2020 ◽  
pp. 57-59
Author(s):  
O. N. Grinyuk ◽  
K. V. Larikov ◽  
O. V. Aleksashina ◽  
L. N. Parshina
Keyword(s):  
Cathodic Protection ◽  
Protection System ◽  
Safe Operation ◽  
Electrochemical Protection ◽  
Method Of Calculation ◽  
Cathodic Protection System

In the article the method of calculation of anode grounding at electrochemical protection of pipelines for ensuring their reliable and safe operation, and also prevention of their destruction because of corrosion is considered.

Cathodic Disbondment Testing Comparison of Carbon Fiber, Fiberglass, and Hybrid Composite Repair Systems for Pipelines

2012 ◽  
Author(s):  
Matthew A. Green ◽  
Larry Deaton ◽  
Christopher J. Lazzara
Keyword(s):  
Cathodic Protection ◽  
Repair System ◽  
Fiber Types ◽  
Preventative Measure ◽  
Composite Repair ◽  
Protection Systems ◽  
Repair Systems ◽  
Cathodic Protection System ◽  
Internal Pressures ◽  
The Impact

Composite repair systems are being successfully and heavily utilized for the repair of a wide variety of pipeline systems operating at high internal pressures worldwide. Many of these pipelines employ cathodic protection systems as a preventative measure of insuring that the pipeline does not corrode. Even with advanced cathodic protection systems, there are still times that a pipeline may become damaged or corroded and composite repair systems are a popular choice. In order to qualify a composite repair system for use on a cathodically protected pipeline, the repair system must undergo specific testing to insure that there will be no issues of disbondment of the composite due to the cathodic protection system. This paper discusses the testing of composite repair systems with varying fiber types, resins, and installation methods. Results have been gathered for several repair system options and indicate that there is variance in the results depending on the above mentioned variables. The results of each of these systems and the impact of the fibers utilized will be discussed and conclusions made as to the effect of cathodic protection on each.

Solving Design Problems for Cathodic Protection of Glass-Lined Domestic Water Heaters

CORROSION ◽  
1960 ◽  
Vol 16 (9) ◽  
pp. 9-17
Author(s):  
H. C. Fischer
Keyword(s):  
Cathodic Protection ◽  
Hot Water ◽  
Test Results ◽  
Domestic Water ◽  
Design Data ◽  
Design Problems ◽  
Water Heaters ◽  
Protection Systems ◽  
Current Densities ◽  
Cathodic Protection System

Abstract Factors important in designing” a cathodic protection system for glass lined domestic hot water heaters are considered. Method by which bare areas of single coated glass lined tanks can be calculated is explained, and comparisons are made between calculated values and those obtained by tests on tanks under protection. Instruments for making these tests and techniques are illustrated and described. Design data relevant to required current densities are considered with respect to platinum clad tantalum and platinum plated titanium anodes. Regulations of Underwriters’ Laboratories concerning accumulated gas from cathodic protection systems are weighed against test results and the volume of gas actually produced is measured and analyzed. Design criteria and details for rectified current used in systems applied to electrically heated tanks are given. Details of a thermoelectric generator for use with gas fired tanks are given. This generator produces sufficient current to protect a well-lined tank in the highest resistivity water likely to be encountered. 5.2.3

The Evaluation of Cathodic Protection System Design by Using Boundary Element Method

2011 ◽  
Vol 339 ◽  
pp. 642-647 ◽  
Author(s):  
M. Ridha ◽  
M. Safuadi ◽  
Syifaul Huzni ◽  
Israr Israr ◽  
Ahmad Kamal Ariffin ◽  
...  
Keyword(s):  
Boundary Element Method ◽  
Boundary Element ◽  
Cathodic Protection ◽  
Storage Tank ◽  
Three Dimensional ◽  
Protection System ◽  
Sacrificial Anode ◽  
Protection Systems ◽  
Cathodic Protection System ◽  
Element Method

Cathodic protection system is one of corrosion protection systems that well acknowledged protecting infrastructure such as pipeline and storage tank. Early damage of the infrastructure can be caused by improper design of the protection system. Currently, many cathodic protection systems are designed only based on the previous experiences. It is urgently needed the tool that can be used to simulate the effectiveness of any design of cathodic protection system before the system is applied to any structure. In this study, the three-dimensional boundary element method was developed to simulate the effectiveness of sacrificial anode cathodic protection system. The potential in the domain was modeled using Laplace equation. The equation was solved by applying boundary element method, hence the potential and current density on the metal surface and at any location in the domain can be obtained. The boundary conditions on the protected structures and sacrificial anode were represented by their polarization curves. A cathodic protection system for liquid storage tank and submersible pump were evaluated in this study. The effect of placement of sacrificial anode were examined to optimize the protection system. The result shows that the proposed method can be used as a tool to simulate the effectiveness of the sacrificial anode cathodic protection system.

Evaluation of Designs of Shipboard Cathodic Protection Systems Using Boundary Element Modelling Technique

2011 ◽  
Author(s):  
Yueping Wang
Keyword(s):  
Boundary Element ◽  
Cathodic Protection ◽  
Modelling Technique ◽  
Hull Form ◽  
Corrosion Failure ◽  
Element Modelling ◽  
Protection Systems ◽  
Uniform Current ◽  
Impressed Current ◽  
Cathodic Protection System

Boundary element modelling technique was used to evaluate the performance of the underwater hull impressed current cathodic protection (ICCP) system of a steel-hulled vessel, as part of an investigation of the corrosion failure of the steel hull near the ICCP anodes. The same technique was also used to evaluate the designs of an alternate sacrificial anode cathodic protection system. The modelling results indicated that the existing ICCP system was capable of providing adequate cathodic protection to the underwater hull and appendages if the current demand is less than 2.4 A. Small anode size was found to have a profound effect on the potentials immediately adjacent to the anode, stressing the need for an effective, intact anode shield. Application of paint coating on the bronze propellers could substantially reduce the current demand from the anodes, resulting in less negative potentials adjacent to the anodes. The modelling results also showed that the anode design adopted from a vessel of similar size (<5% difference in all dimensions), which consists of 8 hull mounted aluminum anodes and 4 rudder zinc anodes, would provide adequate cathodic protection for the underwater hull structures of the existing vessel for more than 3 years. The performance of a modified anode placement was also studied in comparison with that of the original anode placement. The results indicated that the anodes in the modified anode placement would not only contribute more uniform current than the anodes in the original anode placement, but also result in the potential profiles that have less variations along the hull form. This modified anode placement would potentially result in a longer service life of the anodes.

The use of models for the design of pipeline cathodic protection systems

1969 ◽  
Vol 16 (3) ◽  
pp. 24-27
Author(s):  
Jirří Nekoksa
Keyword(s):  
Cathodic Protection ◽  
Power Supply ◽  
Protection System ◽  
Long Distance ◽  
Protection Systems ◽  
Piping Systems ◽  
External Power ◽  
Cathodic Protection System ◽  
Use Of Models ◽  
External Power Supply

THE INTENSIVE construction of long‐distance metal pipelines and of underground piping systems generally, has produced related problems in ensuring an effective cathodic protection system. For the cathodic polarisation of a protected construction, a cathodic protection installation with an external power supply is the most widely used.

Study on the interference between cathodic protection systems of gas station and long distance trunk pipeline

2016 ◽  
Vol 63 (5) ◽  
pp. 405-413 ◽  
Author(s):  
Gan Cui ◽  
Zili Li ◽  
Chao Yang ◽  
Xiaoyong Ding
Keyword(s):  
Cathodic Protection ◽  
Control Point ◽  
Protection System ◽  
Long Distance ◽  
New Thought ◽  
Content Type ◽  
Trunk Pipeline ◽  
Protection Systems ◽  
Gas Station ◽  
Cathodic Protection System

Purpose Under normal conditions, there are different protection objects inside and outside the gas station, so two sets of independent cathodic protection systems are adopted. At the same time, an insulating flange is applied at the position where trunk pipelines access to the gas station, which realizes electrical isolation of the structures inside and outside the station. However, as a result of short distance between the two cathodic protection systems, there will be stray current interference between them. The purpose of this paper was to study on the interference between cathodic protection systems of gas station and long distance trunk pipeline. Design/methodology/approach Based on the above, in this paper, first, the mathematical model of interference between cathodic protection systems was established and the control equations solved using the boundary element method. Second, the influence of cathodic protection system of gas station on long distance trunk pipeline and the influence of cathodic protection system of long distance trunk pipeline on gas station were studied separately using BEASY software. Finally, a new thought of cathodic protection design for local station was put forward. Findings It was concluded that there were serious interference problems between the cathodic protection systems of gas station and long distance trunk pipeline. By moving the potential control point to area outside the influence scope of anode ground bed could avoid the influence of cathodic protection system of gas station on long distance trunk pipeline. By moving the auxiliary anodes away from gas station could avoid the influence of cathodic protection system of long distance trunk pipeline on pipelines in gas station. The new thought of cathodic protection design could avoid the interference between the cathodic protection systems effectively. Originality/value It is considered that the results can guide cathodic design for gas station and long distance trunk pipeline. The results can also avoid the interference corrosion between the structures in gas station and trunk pipeline.

scholarly journals Modeling of electromagnetic fields of pipelines cathodic protection systems in horizontally layered medium

2020 ◽  
Vol 4 (1) ◽  
pp. 52-61
Author(s):  
Vladimir N. Krizsky ◽  
◽  
Pavel N. Aleksandrov ◽  
Alexey A. Kovalskii ◽  
Sergey V. Viktorov ◽  
...  
Keyword(s):  
Electric Conductivity ◽  
Cathodic Protection ◽  
Layered Medium ◽  
Insulation Resistance ◽  
Average Value ◽  
Field Sensitivity ◽  
Trunk Pipeline ◽  
Protection Systems ◽  
Cathodic Protection System ◽  
The Magnetic Field

Design of cathodic protection systems of the trunk pipeline is regulated by current standards, based on the condition of uniformity and constancy of the electric conductivity of the multilayered half-space surrounding the pipeline. The current mathematical models of such systems also use an average value of the medium electric conductivity, which does not fully reflect the actual characteristics of the soil, in which the pipeline is laid. The authors present a method that accounts for the thickness and electrical conductivity of individual beds in a vertically-inhomogeneous, horizontally layered medium (the most practically appropriate case). Using method of computational experiment, the authors showed the importance of accounting for the effect of the medium layers structure and electrical resistivity on the protective voltage of the electric current in the cathodic protection system for underground trunk pipeline and studied the magnetic field sensitivity dependence on the insulation resistance of the pipeline defect-containing segments and on the altitude of data acquisition.

Sign in / Sign up

Export Citation Format

Share Document