Corrosion Mechanism of Metals and Alloys in the Silicon-Hydrogen-Chlorosilane System at 500 C Available to Purchase

To determine suitable materials of construction for a high pressure fluidized-bed reactor and to develop a basic understanding of the corrosion mechanism of alloys and metals in a hydrochlorination reaction environment, selected materials were studied. The study included tests on nickel, copper, carbon steel, Alloy 400, AISI 304 stainless steel, Incoloy 800H, and Hastelloy B-2. Results showed that silicon diffusion into the base metal produced a silicide film that could resist HCl attack, although continuous diffusion of Si into the metal constitutes another form of corrosion. A process for selecting suitable base materials for the reactor is presented.