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Impressed current cathodic protection (CP) systems for water storage tanks must be periodically tested in order to ensure proper performance. Remote monitoring units (RMU) provide the ability to monitor CP system performance data from remote locations using modem-equipped personal computers.
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Remote monitoring reduces the cost of monitoring cathodic protection and improves the reliability of cathodic protection systems. Automated processes by the end user can populate data into existing databases customized for cathodic protection record-keeping, and can be integrated with other software.
Two types of impressed current cathodic protection and a sacrificial method were used to protect over 100000m2 of reinforced concrete caissons and deck slab of a new ship repair yard. This paper describes the CP and monitoring systems used and compares the monitoring results from the different types of system and probe.
This paper will focus on design parameters required for cathodic protection (CP) of stainless steel screens with particular attention on design and operational current density values and suitable protection criteria. The detrimental effects of overprotection will also be discussed.
This paper discusses the implementation of an on-line remote ultrasonic (UT) system at a SAGD (Steam Assisted Gravity Drainage) facility located within the Athabasca oil sands reserves in Northern Alberta.
Case histories where throttling down the cathodic protection was evaluated to determine the impact on reducing the AC corrosion threat. Includes the use of fast-response electrical resistance corrosion rate probe monitoring technology.
There are several ways to validate the performance of a cathodic protection (CP) system for buried pipelines. Over the years, pipeline networks and their corrosion challenges have become increasingly complicated, not least due to the many sources of both AC and DC interference that affects CP operation. Also, the various measurement techniques that can be applied to test CP effectiveness has increased over the years. Finally, the sheer number of buried pipeline miles has been constantly increasing.
Regulation and business needs of an organization are primary drivers for the decisions made in a pipeline integrity management data plan. How data is acquired and stored can vary greatly as determined by those factors. Two production databases and multiple remote sensor vendor databases are referenced in this text, each with a business case to operate independently.
Impressed current rectifiers are the backbone of a pipeline operator’s cathodic protection (CP) systems. A rectifier’s ability to protect a large length of electrically continuous pipeline considerably improves efficiencies and reduces material costs as compared to galvanic systems. However, like galvanic anodes, impressed current anodes are a consumable asset, and require replacement at the end of their service life to ensure that the rectifier can continue to adequately protect the pipeline.
Atmospheric corrosion monitoring has traditionally been a lengthy and costly discipline. Visual inspection and weight loss testing is commonly applied, and this requires years of testing and on-site inspections with regular intervals. Furthermore, inspections and surveys in marine environments are troublesome, expensive and sometimes dangerous.
The presentation discusses use of combined direct monitoring and wireless local networking technologies allowing multiple data types from several locations in a gas storage field to be accessed through a single field device.