Argonne National Laboratory Alloys Resist Metal Dusting
Degradation of structural components made from iron- and nickel-base alloys by metal dusting occurs in a variety of high-temperature, high-carbon activity processes that are in widespread use in the chemical and petrochemical industries. Metal dusting is a corrosion phenomenon that occurs in these alloys and is characterized by pitting and mass wastage when exposed to strongly carburizing gas atmospheres in the temperature range of 400–800°C. To avoid metal dusting problems, industry is often forced to design lower temperature processes that are less energy efficient, waste more materials, and have lower yields.
A study conducted at Argonne National Laboratory (under the temperature, pressure, and gas composition conditions found in the reformer environment) has clearly established the role of carbon deposition in the mechanism leading to initiation and propagation of metal dusting attack and has lead to the development of metal...