Coating of gamma -Al sub(2)O sub(3) on the Stainless Steel Substrate by Electrophoretic Deposition Method

gamma -Al sub(2)O sub(3) coatings were prepared on aluminum-free stainless steel (SUS304) by electrophoretic deposition method. Both X-ray diffraction and scanning electron microscopy were used to study the crystalline structure and morphological features of the coatings. Themo gravimetry-differential termal analysis (TG-DTA) is used to study the thermo-chimerical reaction behavior of coatings. Catalytic activity of coatings is determined by degrading of NO sub(x). The results indicated that the thickness of the coatings onto SUS304 could reach 5 [micro]m without any exfoliation at optimized conditions. Catalytic properties of samples coated by electrophoretic deposition method were highly enhanced as compared with that of samples prepared by the dip coating method.