Car Carrier Surface Of The Catalyst Metal Pretreatment Applications

Metallic substrate automobile catalyst is a novel catalyzes technology, which has an extensive application and wide foreground in auto emission cleanse technology. But the firm load between washcoat and metallic substrate is the bottleneck of the technology development.Several methods of FeCrAl alloy substrate surface pretreatment are studied in this thesis. An inorganic transitional membrane, which can get fastness load of y-Al2O3 washcoat, is produced by FeCrAl alloy substrate surface pretreatment. Technology factors of FeCrAl alloy substrate surface pretreatment are ascertained in my thesis and the directions for producing s are also confirmed. The properties of are studied by XRD, SEM, XPS, BET and supersonic methods. Through the thesis reseach, a firm load y-Al2O3 washcoat layer is obtained on FeCrAl alloy substrate.According to the thesis research, MDPF (Metallic Diesel Particulate Filter), metallic alveolate substrate for diesel oxidizer catalyst, petrolic engine three way catalyst and motorcycle catalyst are produced. The properties are also studied, which testified that firm load technology for metallic substrate catalyst has a board foreground in automobile catalyst application.