Case Histories

Failed Anchor Rods on the San Francisco-Oakland Bay Bridge: A Corrosion Discussion

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.

Cladding Protects Vessel from Sulfide Stress Cracking in Sour Service

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.

Corrosion in Public Aquariums

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.

How to Conduct a Technical Committee Meeting

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.

Battling Corrosion in Nuclear Waste Storage Facilities

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.

Corrosion Effects on the Durability of Reinforced Concrete Structures

Several myths concerning the cause of reinforced concrete deterioration prevailed in the mid-20th century, but steel corrosion is by far the biggest durability issue for reinforced concrete structures.

Gas Plant Uses Carbon Fiber-Reinforced Polymer Wrap to Strengthen Concrete Columns

Pipe wrapping turned out to be a simple and low-cost method for strengthening concrete columns during the construction of a new natural gas plant in Colorado.

Localized Corrosion Failure of a Hydraulic Pipeline in a Subsea Gas Well

After 10 years of normal operation, a hydraulic circulation pipeline of a subsea gas production well failed at its bend zone due to internal localized corrosion attack. This appears to be related to crevice corrosion and pitting.

Chemically Bonded Phosphate Ceramics Provide Corrosion Protection for Storage Tanks

A variety of industrial facilities with structures constructed of carbon steel are at risk of corrosion. An inorganic spray-on protective coating technology provides corrosion protection to metal through a chemically bonded phosphate ceramic.

The Science Behind It: Corrosion Caused Lead-Tainted Water in Flint, Michigan

Learn more about the Flint, Michigan drinking water crisis caused by corrosion in this new quarterly special feature, The Science Behind It. Read the MP article to get the basic facts, and then explore the science behind the corrosion problem, which is presented in several related CORROSION articles.

Detecting Pipeline Stress Corrosion Cracking through Direct Assessment

External corrosion direct assessment (ECDA), a structured process intended to assess, manage, and reduce the impact of external corrosion on pipelines, was used to detect stress corrosion cracking in a buried natural gas transmission pipeline in Pakistan.

Leaking Seawater Tanks Repaired with New, Fast-Curing Material

When a vertical seawater tank sprang a leak at a coastal hydrocarbon storage tank farm in Italy, the tight time window for repair meant that only solutions with very short cure times were an option.

Test Protocol Evaluates Concrete Repair with Sacrificial Anodes

One of the most common drivers of concrete repairs is corrosion of the concrete’s steel reinforcement, often caused by chloride ions in the environment entering the concrete and eventually reaching the embedded steel.

UAVs Capable of Inspecting Ship Tanks for Signs of Corrosion

By using UAV technology, survey times and staging costs associated with visual condition checks of remote structural components in ship tanks can be significantly reduced.

University Team Develops Faster Route to Corrosion Detection in Metals

Researchers at the University of Virginia are seeking to modify the traditional cyclic corrosion test chamber by adding ozone to the mix and greatly accelerating the process.