Research On Preparation And Properties Of Porous Iron Carbon Alloy

Porous metal material is a type of composite material which is composed of metal matrix and pore space. Because it has many good properties, such as low density, high strength, noise absorption, shock absorption, heat resistance, penetration, and so on, it is widely used in the fields of chemical industry, construction, national dense, medicine,environmental protection. Compared with the low melting point materials such as porous Al and Mg, the strength and high temperature performance and energy absorption performance is more outstanding, which has become one of the hot spots in the research of many scientific technological workers.Fe(OH)3 was prepared by hydrolysis precipitation method, Fe2O3 was prepared by calcinations in air, and porous iron carbon alloy was successfully prepared by reduction in H2. On this basis, the p H value of the acid wastewater was adjusted, the iron ions in the solution was precipitated, and then the porous iron carbon alloy was reduced in H2. This study provided a new method for the treatment of acid wastewater and the preparation of porous iron carbon alloy.The samples were characterized by field emission scanning electron microscope( FE-SEM), X ray energy dispersive spectrometer(EDX), X ray diffraction(XRD),nitrogen adsorption(BET) and electrochemical workstation. The impact of the starch amount and the reduction temperature on porous iron carbon alloy was researched. The range of the average particle size of the products was determined. The electrochemical property of the products under different experimental conditions was discussed.The results showed that when the starch amount was 22%, and the reduction temperature was 750℃, the structure and distribution of the prepared porous iron carbon alloy were uniform, the specific surface area was larger, the grain size was smaller and the average pariticle size was 25 ~ 55 nm. Compared the hydrolysis precipitationreduction method with the precipitation-reduction method, the former had smaller grain size, higher corrosion potential and a better corrosion resisitance.