Research On Anti-corrosion Technology Of Brominated Butyl Rubber Mixer

Brominated butyl rubber has been widely used in the tire, auto parts, medical supplies industrial products, and many other fields, due to its advantages like air tightness, heat resistance, ageing resistance, etc. However, the corrosion of brominated butyl rubber production equipment is very serious. Especially the brominated butyl rubber mixer, for example, which have large areas of corrosion perforation phenomenon. The corrosion is severely restricting the efficiency of production, extending the production cycle, and increasing the costs of manufacture. Therefore, it is imperative to carry out targeted research for anticorrosive measures of brominated butyl rubber mixer.In this paper, two reasonable research programmes were made for anti-corrosion technology based on the research of corrosion environment in which a petrochemical factory of brominated butyl rubber mixer device served as the research object. The first one is to design corrosion weightlessness experiments according to the orthogonal experiment and combined with the experiments of electrochemical corrosion and microscopic morphology, then analyze the main corrosion factors, make out the order of corrosion resistant in 8 kinds of the metal material, and finally, screen the material that have good corrosion resistance; The second is to prepare 6 kinds of coating using the method of plasma spraying and electrostatic spraying, testing the mechanical properties and corrosion resistance of the coatings, finally screen out the feasible coating protection scheme.Based on above researches of experimental results, this paper draw the following conclusions:（1） Br₂ is the main factor that lead to serious corrosion of the eight kinds of materials, The degree of the influence of H2 O, HBr, temperature and rotational speed on the corrosion rate varies according to the materials;（2） The order of 8 kinds of material`s corrosion resistant properties is:TaW10>Ta>TaNb3>TaW2.5>>C-276> 904L>SAF2507> 316 L.（3） among the 4 kinds of coatings prepared by plasma spraying, Ti C coating and SiC coating`s coating ratio is too low, the porosity of WC coating is too big and it`s bonding strength is too small, The porosity of Ta coating is more larger than WC, the four kinds of coating are can not meet the requirement of the industrial environment on the performance of the coating;（4）Both of ECTFE coating and PFA coating, which is prepared by electrostatic spraying, have rational thickness, good adhesion, low porosity and excellent corrosion resistance. So they are good choices to the butyl rubber production equipment corrosion resistant coatings.