Welcome to the early July edition of the Corrosionpedia News Roundup. In case you haven’t been following our News Roundups yet, they are a way for us to keep you up to date with the latest happenings in the world of corrosion. We highlight new products for corrosion prevention, news events related to corrosion, and advances in the science of corrosion. For this edition of the Roundup, we discuss awards for breakthroughs in powder metallurgy, highlight a new corrosion-resistant valve that keeps oil and gas personnel safe from fires, and discuss a corrosion restoration project for a NASA rocket that is over 40 years old!

Corrosion a Primary Concern for the United States Navy

On June 18 through June 20, 2019, the American Society of Naval Engineers held its symposium for technology, systems and ships in Washington DC, and one of the main topics was battling corrosion on United States Navy ships.

The US Navy makes many of its ships with the intention of keeping them in active service for decades. However, because they spend a majority of their service life in saltwater, the ships are subjected to abundant corrosion risks. Vice Admiral Thomas Moore estimated at the symposium that the Navy currently spends billions of dollars on corrosion control for military fleets. While this is an impressive sum of money, he also mentioned corrosion control is a discipline that requires ongoing attention moving forward.

Powder Metallurgy Awards Ceremony Held

The Metal Powders Industries Federation released its list of winners of the Powder Metallurgy Design Excellence Awards at the POWDERMET conference in Phoenix, Arizona. The event, held from June 23 to June 26, 2019, brought together industries leaders for discussions on advancements in powder metallurgy. The awards were given to companies that designed impressive components using powder metal.

Some award winners were selected for their special mechanical properties or unique geometrical attributes. One winner, Indo-MIM Pvt. Ltd., was noted for its use of corrosion resistant techniques on a powder metal. The India-based company developed ski boot bindings made of powdered MIM-4605, a low alloy steel. The bindings, once in their final form, were zinc-passivated for protection from corrosion.

Alleged Rust on Plane Propeller Causes Concern

A video released in early July showed footage of a propeller-driven plane with what seemed to some observers to be rust in the area of the propeller itself. Regional Express Airlines, the Australian company that owned the plane, has refuted allegations that corrosion was present on the propeller. A company official replied to press inquiries by stating that it was a brown stain that was easily wiped off, and not rust. A report was issued by a society of aircraft maintenance personnel to the Australian government’s safety entity, the Civil Aviation Safety Authority. The report claims that Regional Express Airlines does not adequately encourage employees to report equipment faults. These report claims have also been rejected by Regional Express Airlines, which in turn provided data highlighting employee retention and incidence reporting rates to support their refutation.

Corroded NASA Rocket Restored

At the Kennedy Space Center in Florida, the restoration of a NASA space rocket has just been completed. The rocket, a Saturn IB rocket to be more specific, had heavily corroded sections that needed repair and replacement so that it could be put on display for tourists. The rocket had laid on its side for several decades and was exposed to the salty environment that is Florida’s east coast. As a result, several parts of its frame had to be completely replaced. Galvanic corrosion was a major factor over the years the rocket sat idle, so many areas with dissimilar metals that had contact with one another had to be replaced as well. Much painting was also performed to protect the restored rocket from further corrosion.

New Weld Purge Monitor Helps Prevent Corrosion

Huntingdon Fusion Techniques HFT® has released a new weld purge monitor that is intended for field conditions and made to prevent corrosion that occurs while welding in a variety of environments. The PurgEye® Site is an oxygen monitor enclosed in a case that protects it from the elements. Monitoring oxygen levels when welding certain types of materials can be crucial to prevent corrosion. If, for example, a stainless steel alloy does not have sufficient shielding from oxygen, then it can become oxidized during the welding process and be less resistant to corrosion. The new weld purge monitor from Huntingdon Fusion Techniques HFT® helps ensure that welded material is not compromised simply because it was welded under difficult conditions.

New Valves Eliminate Risk of Galvanic Corrosion

Oil and gas operators have a new option when it comes to seawater service valves. Severn Glocon Group, a British valve engineering firm, has released a new valve product that is not susceptible to galvanic corrosion. The triple offset butterfly valves by Severn Glocon Group are called OCT SW, where the OCT stands for “oblique cone technology”. They are made without graphite, a material that can cause galvanic corrosion in saline environments. The valve's intended use is to provide seawater as a flame extinguisher in case of a fire at offshore oil and gas locations. If corrosion were to cause the valve or a pipe adjacent to it to fail, then fire suppression could be compromised.