Coatings & Linings

Using Pipeline Coatings with Cathodic Protection

During the service life of a pipeline, the coating has to maintain its integrity under operating environments and in the presence of cathodic protection (CP). A coating that exposes bare metal areas renders the pipe surface susceptible to corroding species, and a functional CP system will be required. This article discusses the basic principles of corrosion protection with coatings and CP, and the attributes of an effective pipeline coating.

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.

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.

2018 Deadline Nears for New U.S. Underground Storage Tank Rules

The third and final deadline for underground storage tank owners and operators to meet new federal requirements from the U.S. Environmental Protection Agency for spill, overfill, and corrosion protection is October 13, 2018.

Eliminating Coating Failures—A Case Study for Achieving Long-Term Cost Savings in the Oil Field

Giving special attention to surface preparation and eliminating surface contaminants prior to coating can essentially eliminate premature coating failure.

Pitting Repairs for High-Temperature/High-Pressure Process Vessels

The most damaging form of corrosion is localized corrosion, which can be prevented and controlled by using corrosion inhibitors, cathodic protection, and protective coatings.

Advanced Fluoropolymer Fouling-Release Coating

On static structures, such as the steel legs of an offshore oil platform or the hull of an floating production, storage, and offloading (FPSO) vessel, the structural integrity of the welds need to be visually inspected and assessed. If the substrate is covered in biofouling that isn’t easily removed, a large amount of force is required to scrape it off, which may damage the underlying protective coating and leave the substrate vulnerable to corrosion.

Understanding a New Standard

The Canadian Standards Association developed CSA Z245.30-141 for external field-applied coatings on steel pipelines. It defines requirements for the qualification, application, inspection, and testing of external oil and gas pipeline coatings applied in the field or shop.

Long-Term Protective Coating Success

Corrosion poses a threat to all infrastructure, and the economic impact of corrosion represents an annual cost of billions of dollars. There are many advantages of planning for corrosion control and mitigation. It is important that owners and operators of high-value assets understand the cost implications of the effects of corrosion.

It’s Not Just Paint—A Qualified Inspector Is Still Needed

The purpose of this article is to draw some attention to the importance of surface preparation and coating inspection and perhaps change some attitudes and the all-too-common practice of assigning less than qualified and experienced personnel to inspect surface preparation and coatings.

NACE, SSPC Publish Joint Wet Abrasive Blast Standards

NACE International recently published five new joint companion wet abrasive blast (WAB) standards with the SSPC: The Society for Protective Coatings. These standards define the processes for preparing a carbon steel surface to a specified degree of surface cleanliness using a WAB cleaning method.

Chromate Primer Alternative Uses Carbon Nanotubes Modified with Corrosion Inhibitors

Scientists have developed a non-chrome primer system by incorporating carbon nanotubes (CNTs) modified with organic corrosion inhibitors into an epoxy-based resin. The goal of the coating development effort was to identify promising CNT-containing non-chrome primer formulations that perform comparably to traditional chromated ones.

Zinc-rich Epoxy Primer Uses Glass Spheres, Zinc Activator to Enhance Corrosion Resistance

A novel, organic zinc-rich primer coating technology relies on a combination of zinc dust, hollow glass spheres, and a proprietary activator to provide cathodic protection with greatly improved mechanical properties (crack resistance) and adhesion.

Wrap Repair Saves Failing Seawater Filter Vessel

A unique wrap was used to repair a seawater bulk media filter vessel on an offshore oil and gas platform in the Gulf of Mexico. The bottom of the vessel was suffering from external damage due to the heavily corrosive environment and seawater being transported.

Effect of Humidity on Surface Preparation and Coating Application

A common coating scenario is that a contractor blasts all day long, then experiences delays before coating the blasted surface. A dehumidification system can help with meeting specifications for application and achieving customer satisfaction.