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Editor's Choice

Linking Microbiologically Influenced Corrosion to Microbiological Activity Using Molecular Microbiological Methods

While there are solutions to mitigate microbiologically influenced corrosion, a big challenge is to make the connection between corrosion damage and the activity of microorganisms.

Vapor Corrosion Inhibitors for Tank Bottom Corrosion Control

A study was recently conducted to determine the viability of vapor corrosion inhibitor (VCI) technology in mitigating corrosion. Overall, VCIs were found to be effective in mitigating corrosion when recommended dosages are used, and they could also be used in combination with impressed current CP systems.

Significance of Evaluation Methods for Surface-Applied Inhibitors

This article discusses the performance and relative importance of a recent testing program for corrosion inhibition and other performance parameters using documented test methods.

Nickel-Rich Coating for Saline-Alkali Soil Grounding

To improve the corrosion resistance of the grounding grids in saline-alkali soil, the authors fabricated a conductive and anticorrosive coating. After a series of tests, results indicated that an increase of nickel powder in the coating can lead to its electrical conductivity enhancement.

Remote Monitoring System Tracks Cathodic Protection and Sensor Data

There is a need at many remote oil and gas field sites for data typically collected by specialized sensors. To meet this need, a remote CP monitoring platform was developed that combines a dedicated two-channel CP rectifier/test station monitoring device and a dedicated two-channel sensor/transducer monitoring device into one unit.

Corrosion Basics: Protecting Fixed Structures in Seawater

Structures such as steel bulkheads, steel piles supporting piers or wharfs, offshore drilling platforms, and other similar structures may be cathodically protected with either sacrificial galvanic anode systems or impressed current systems.

Risk Assessment Justifies Cathodic Protection Retrofit on an Aging Pipeline

As pipelines age, it is important to verify the effectiveness of the coating and cathodic protection systems that protect them against external corrosion, and implement remedial actions if necessary.

Teaching Cathodic Protection with an Outdoor Pipeline Integrity Lab

A major U.S. university is using funding from Phillips 66 to develop a new outdoor pipeline integrity lab, which will include buried pipe with an active rectifier to simulate real-life activities.

Corrosion Basics: Close-Interval Potential Surveys

The principle of a close-interval potential survey is to record the pipe-to-soil potential profile of a pipeline over its entire length by measuring potentials at intervals that do not significantly exceed the depth of the pipe.

Fundamentals of Rectifier Operation, Monitoring, and Maintenance

Cathodic protection (CP) is an important component for the sustainability of many metal structures. The most common impressed current voltage sources are rectifiers, which can break down. Well-maintained rectifiers can provide uninterrupted CP, which reduces repair costs and labor/technician time.

Ultrasonic Probe Tests Zinc Galvanizing Kettles

New probe technology developed from recent academic research can conduct safety-critical testing inside galvanizing kettles holding molten zinc at 450 °C.

Coupons for Cathodic Protection Evaluation of Mixed-Metal Piping Systems

The measurement and interpretation of cathodic protection (CP) data in plants or other complex facilities present inherent challenges where mixed metals are electrically continuous within the protected structures’ CP system.

Steel Bridges Protected with Two-Coat Polyaspartic Urethane Coatings

A second generation of a polyaspartic urethane two-coat coating system with improved wet adhesion and corrosion resistance was developed in recent years for application in warm climates with high humidity.

Applying Cathodic Prevention to Electric Transmission Tower Foundations

A novel approach is presented regarding corrosion assessment and cathodic prevention of foundations for electric transmission towers in the Persian Gulf region.

Study: Graphene Technology Boosts Performance of Epoxy Coatings

Initial test results have shown higher corrosion resistance, increased mechanical strength, and better abrasion resistance when using epoxy resin-based coatings formulated with graphene.