Benzo Three Azole Derivatives Inhibitor Of The Synthesis And Applied Research

In this paper, in order to develop new anti-corrosive oil products to meet the requests of short-term anticorrosive for stainless steel and carbon steel products, study on the corrosion inhibits as key components of anti-corrosive oil was conducted. With benzotriazole as raw materials, four kinds of derivative inhibitors of benzotriazole are successfully synthesized, i.e. 1-methanol-benzotriazole(MABT),1-benzotriazoly-methyl methacrylate(BTMM), Poly(1-benzotriazolymethyl methacryla-te-co-methacrylate)(Poly(BTMM-co-MA)), Poly(1-benzotriazolymetyl methacrylate-co-acrylic acid)(Poly(BTMM-co-AA)) respectively. Structure characterization and properties of the as prepared compounds are investigated by IR,1H NMR, gel permeation chromatography and thermogravimetric analysis.Phase transfer catalyst synthesis of MABT is studied in detail. Results show that the product yield is improved by improving reaction conditions and consumption of solvent is also reduced. With benzotriazole and formaldehyde as raw material, adopting PEG-1000 as phase transfer catalysts, the optimum reaction conditions for synthesis of reactants is that ratio of n (benzotriazole):V (formaldehyde):n (PEG-1000) is 1:0.2:0.01 and reaction temperature is 25℃and reaction time is 0.5 h. The reaction yields 97.83%, higher than that by other synthesis method.Corrosion properties of stainless steel and carbon steel in 1% HCl solution and 1% NaCl solution with different corrosion inhibitors is determined by using weight-loss method. Results show that MABT, BTMM, Poly (BTMM-co-MA) and Poly (BTMM-co-AA) have better corrosion inhibition performance than BTA, so we can try to develop new anti-corrosive oil products for application in stainless steel and carbon steel, among of them Poly (BTMM-co-MA) has the features of being capable to self-film, good adhesion and reducing the amounts of film agent in anti-corrosive oil. etc.