Giving special attention to surface preparation and eliminating surface contaminants prior to coating can essentially eliminate premature coating failure.
The most damaging form of corrosion is localized corrosion, which can be prevented and controlled by using corrosion inhibitors, cathodic protection, and protective coatings.
In anticipation of the tightening restrictions on phosphorus and many of the metal-bearing compounds currently used in industrial cooling treatment, a “green” corrosion and scale inhibition technology was developed that contains no phosphorus while providing corrosion and scale control performance.
Recent Materials Performance (MP) articles described the corrosion-related events associated with the new East Span of California’s San Francisco-Oakland Bay Bridge, which included a discussion on the shear key anchor rods that failed after tensioning, as well as the failure of a high-strength, galvanized tower anchor rod. To expand on these articles, MP asked roundtable panelists to comment on HE and its effect on the bridge’s high-strength steel rods, as well as other corrosion issues that could affect the bridge.
Participating in technical standards development at NACE involves attending meetings...a lot of meetings. Well-run meetings are a great tool for exchanging information, working together, and developing consensus to make decisions or create documents. Here are some suggestions on how to conduct a technical committee meeting.
Corrosion in reinforced concrete structures, such as bridges, piers, and parking garages, often occurs due to exposure to high-chloride environments.One type of structure that is often overlooked is the manmade aquarium.
Cracks inside a de-ethanizer column were discovered during shut down.A high-velocity arc spray (HVAS) thermal spray method and high-performance alloy were evaluated for repairs. The extent of the column’s failure, the root cause of the cracking, mitigation steps, and longer term remedial actions are discussed.
To assess internal and external corrosion in piping configurations that are unpiggable or difficult to assess, a novel dynamic pulsed eddy current technology integrated with a robotic inline inspection tool was developed that is capable of internally inspecting metallic pipes.
In Italy, where domestic nuclear power production has been halted, the need is ongoing to safely store low-level radioactive waste produced as a byproduct. The goal is to meet Italian and international requirements for temporary storage of low-level radioactive waste. The waste is stored in steel drums encased in concrete for radiological reasons. Relative humidity of 65% or lower must be maintained to prevent corrosion.
In April 2013, the Las Vegas Valley Water District attempted to install a 500-ft (152-m) deep anode bed for an impressed current cathodic protection system. Before the anodes could be installed, ground water began flowing out of the top of the hole at ~50 gal/min (189 L/m).
Corrosion professionals in North America and Europe have experienced another year of continued growth in career opportunities and salary levels, according to the 2015 Corrosion Career Survey conducted by Materials Performance magazine.
An international oil and gas exploration and production company was looking to enhance oil recovery techniques in Oman. Internal coating of the pipelines provided corrosion protection, reduced friction, and improved flow efficiency when conveying corrosive water slurry, and offered adequate corrosion protection during subsequent transportation of recovered crude oil.
To successfully communicate the wide variety of corrosion-related issues affecting corrosion professionals today, MP is actively encouraging corrosion control professionals worldwide to submit technical articles to share their corrosion-related experiences with over 36,000 NACE International members around the globe.
To protect pipelines in a transit corridor where they crossed underneath the light-rail tracks, construction of the line included retrofitting the pipelines with a precast concrete box culvert casing and installing an impressed current cathodic protection (ICCP) system.
Wireless monitoring technologies provide the ability to
acquire impressed current cathodic protection (ICCP)
system performance data from remote locations using
modem-equipped personal computers. The technology
can monitor the remote ICCP system’s amperage,
“instant-on” and “instant-off” potentials in a central
location, and provide personnel with immediate
warnings of system problems. Case studies are presented for one Air Force and three Army installations, each with a different approach for the monitoring.