Acceso usuarios
Nayif A. Rasheedi, Sultan Mutairi
Objective: To evaluate galvanic anodes used for cathodic protection system in accordance with the industry standards established by NACE in the testing method document NACE TM 0190. The primary objective of this project is to evaluate the effectiveness, performance, and lifespan of different galvanic anodes under various environmental conditions. This includes assessing factors such as material composition, anode design, and installation parameters to optimize cathodic protection strategies.
Theoretical Framework: The test was conducted by passing a fixed direct current through test cells electrically connected in series. Testing anode castings for quality and output is an essential part of the bulk anode manufacturing process. The testing should be carried out as part of the manufacturing process control regime. Part of the qualification process is to test samples of their anodes against 17-SAMSS006 requirements including expected life time. These anodes are rated for long term life and any substandard anodes will end up affecting the integrity and safety of company assets, people and environment in addition to the installation and operations interruptions Method: NACE TM 0190.and other international standards or recommended practices are usually selected to draft technical specifications for cathodic protection of offshore engineering projects. These technical specifications cover similar criteria to ensure the quality of sacrificial anodes for Cathodic Protection such as technical requirements, inspection, chemical composition and electrochemical performance. However, each project has its own complexity and performance requirement, due to the different operating condition (environment) of the assets and the actual usage condition of the sacrificial anode. Therefore, the quality and performance parameters of the sacrificial anode need to be stated carefully and in detail, in the specification to cover all the potential risks involved in the project. At present, the design (service) life of offshore oil engineering equipment/structure is over 25 years, similar to the design life of sacrificial anodes (25 years). Therefore, ensuring the long-term performance of sacrificial anodes is an important factor to ensure the safety/integrity of offshore assets. The test was conducted by passing a fixed direct current through test cells electrically connected in series.
Results and Discussion: The results obtained the average efficiency calculated and measuring parameters like anode potential, current output, and effective lifespan through laboratory and field tests.
Research Implications: The practical and theoretical implications of evaluation galvanic anodes used for cathodic protection system and identification of the most durable and cost-effective galvanic anodes for specific applications are discussed Originality/Value: Evaluating galvanic anodes is essential for developing reliable cathodic protection systems which are essential for preventing corrosion of metal structures such as pipelines, storage tanks, and offshore platforms, thereby extending the lifespan of infrastructure such as pipelines, storage tanks, and offshore structures. This study contributes to the experiment matrix introducing quality control requirements at the casting stage, such as: anode size, weight, appearance, internal defects, chemical composition, electrochemical capacity. However, in engineering practice, we often find that the actual performance of the sacrificial anode does not meet the project's expectations.
