Any mechanical disturbance of the protective film can stimulate attack of the underlying metals until either the protective film is re-established, or the metal has been corroded away. Erosion-corrosion is encountered most frequently in pumps, valves, centrifuges, elbows, impellers, inlet ends of heat exchanger tubes, agitated tanks, and so forth.
In this roundtable discussion, shipping industry leaders within an AMPP Technical Exchange Group (TEG532x) share success stories from their ongoing collaboration. Guests include Elisabeth Charmley, Naval Architect for one of the world's largest ship managers; Johnny Eliasson, Hull and Coatings Engineer at Chevron Shipping; and Buddy Reams, Captain USCG (retired), Chief Technical/Maritime Officer of AMPP.
A C-130 aircraft sits in a hanger as a fresh coat of paint dries at Robins Air Force Base, Georgia, USA. Photo by Joseph Mather, 78th Air Base Wing Public Affairs.
The repair was designed with a prediction of 100 years of service life extension. This was achieved with a steel coating and a concrete coating (barrier effect) that produced a similar or better protective effect than recorded during the evaluation.
When contaminants absorb the light, they either turn into a gas, or the pressure removes the particles from the surface. This leaves the bare metal clean and ready for coating, without damaging its structural integrity.
Researchers with PPG set about to study two coatings—cured for two weeks in both air and underwater—and their adhesion abilities in various conditions.
Having launched on January 6, 2021, the new organization, Association for Materials Protection and Performance (AMPP), represents a combination of NACE International and SSPC: The Society for Protective Coatings.
Several case studies show how the service life of reinforced concrete structures can be significantly and economically extended by using metallic zinc anodes to protect the steel reinforcement from further corrosion.
The structure and morphology of the composite were characterized by Fourier transform infrared spectroscopy and scanning electron microscopy, and electrochemical impedance spectroscopy was used to study the corrosion resistance.
When Eastman Chemical opted for a new urethane coating system on tanks at the front of its flagship plant, not just any applicator could do. The client needed expertise in access, aesthetics, and containment for removal of the prior lead-based coating.
This article reports on the response of a commercially available self-healing epoxy coating to damage designed to simulate microcracking typically observed in protective coatings in the field.
The ROVs measure metal thickness, paint thickness, and cathodic protection (CP) voltage—a corrosion prevention technique the Navy uses that charges the hull at a certain voltage to slow down corrosion.
The electrochemical corrosion behavior at different current densities was studied by using the potentiodynamic polarization and electrochemical impedance spectroscopy tests in combination with scanning electron microscopy.
In this new series, Materials Performance (MP) Magazine Editor Rebecca A. Bickham and Staff Writer Ben DuBose interview a wide range of corrosion experts to bring you the latest news and information regarding key technologies and industry trends.
U.S. Army researchers have refined their high-pressure cold spray repair technique to the point where it is now the military’s preferred solution to corrosion damage and dimensional restoration.