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In this paper, the weight loss method , presence of organic compounds through the determination of dozens of conditions, 5% fluoroborate media corrosion rate and inhibition efficiency of aluminum screening the fluoroborate medium aluminum corrosion inhibition of several compounds . Select one of the cinnamic aldehyde , butynediol , furfural , sodium tripolyphosphate as the research object , by adsorption theory and electrochemical polarization curves to study at different temperatures , each 5% fluoroborate medium aluminum corrosion inhibition calculate the thermodynamic functions of the adsorption process , and then investigate the corrosion inhibition mechanism . The experimental results visible : several substances aluminum surface monolayer adsorption , and basically the Langmuir law in the temperature range studied ; cinnamic aldehyde, Butynediol , furfural , trimeric sodium phosphate adsorption processes are endothermic reaction , the adsorption capacity increases with increasing temperature , the corrosion rate increases , the inhibition efficiency increases ; the cinnamaldehyde , sodium tripolyphosphate cathode suppression inhibitor, butynediol , furfural mixed type inhibitor , can make the presence of these four Inhibitor corrosion current is reduced to varying degrees . In practical applications there are limitations due to the single-component corrosion inhibitor , it is necessary to develop a composite corrosion inhibitor , and able to resist the influence of impurities in the working medium , temperature and other factors . Mainly through orthogonal experiment method for these types of substances complex , a good inhibition effect of corrosion inhibitor compound . And weight loss method , electrochemical polarization curves , scanning electron microscopy corrosion properties were evaluated . Were measured composite corrosion inhibitors temperature resistance , acid resistance , anti timeliness, the inhibition was better than the single-component corrosion inhibitor . The polarization curves law the composite corrosion inhibitor for cathodic corrosion inhibitor . Scanning electron microscopy revealed no pitting, intergranular corrosion and other non-uniform corrosion , corrosion rate . The composite corrosion inhibitor is the fluoroborate medium aluminum excellent corrosion inhibitor .
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