Diffusion coating of ferrous metals - obtd. via powder contg. titanium, chromium, molybdenum, and boron, used to protect chemical plant against corrosion

摘要

Coating is obtd. by treating the ferrous substrate with a powdered mixt. contg. by wt. 51.5-64% Ti, 17.5-24% Cr, 15-21.25% alumina, 1.5-2.0% ammonium halide, 0.75-1.5% Mo and 1-2% boron. The coating is used esp. to protect chemical plant from corrosion, esp. where the plant is employed to mfr. soda; soda prods.; MgCl2; BaSO4; Na2SO4; and other chemicals, where the plant must resist attack by conc. solns. of salts.