The Preparation And Application Study Of The Environment-Protecting Inhibitor In The Inhibition Of The Metal

This study inspected the abstraction way of corrosion inhibitor, Phytic acid, which benefits the environment around us, by a lot of experiment. The result shows that the best acid concentration of Phytic acid abstraction is that hydrochloric acid is 0.06 mol/L and sulpHuric acid is 0.03mol/L. The optimal extraction time of the Phytic acid is two hours. The addition of the absolute alcohol and acetone will remarkably improve the rate of the Phytic acid abstraction and also improve the availability of the material. The process of the Phytic acid abstraction used ammonia water and the ion exchange resin avoid the invasion of the foreign matter. As a result, the cost of the abstraction is decreased. The experiment also studied the inhibition effect of the Phytic acid and the imidazoline derivate (B) on A3 steel and the concrete steel of 16 in simulative sea water (3.5%NaCl solution) and simulative pore solution of the concrete by steady polarization curves, A.C impedance, Tafel curves and open potential. The result shows that the Phytic acid can remarkably inhibit the corrosion of the A3 steel and concrete steel and it is an anodic inhibitor. And the critical chloride iron concentration and the simulative pore solution of the concrete have an half logarithm linear relationship.The imidazoline derivate (B) has the eminent inhibition on the corrosion of the A3 steel in simulative sea water (3.5%NaCl solution) and it is a typical kind of anodic inhibitor. And B has the same inhibition in the simulative pore solution environment of carbon concrete which pH value is 9.5. It is an anodic inhibitor in this environment. But the B could not inhibit the corrosion of the concrete steel in the simulative pore solution environment of carbon concrete which pH value is 10.5.