| A conductive polyaniline coating was polymerized on stainless steel 340 inacidic solution by means of electrochemical constant current method. Theinfluence of solvent, acidic medium on the appearance of polyaniline films, andthe pH of the acid solution on the peak current were studied. The orthogonaldesign of experiment showed that the homogeneous, dense, and adherentpolyaniline coatings could be electrodeposited on the stainless steel inH2SO4-aniline solution. The optimum condition is that the range of the currentdensity was from 0.1mA/cm2 to 0.2mA/cm2, the concentration of aniline was0.2mol/L, the pH of solution was between 1.5 and 2.0.The polyaniline film coated on stainless steel was characterized b.y CV, IR,X-ray and its behaviors were studied through the polarization curve, dissolubilityand mechanical property. The anodic polarization curve of sample in sodiumchloride solution showed that the pitting corrosion potential of stainless steelcoated with polyaniline increased about 1.0V (vs.SCE) compared with blank. Thisindicated that the polyaniline.coating could greatly improve the pitting corrosionresistance of stainless steel, and had better prospect in corrosion protection ofstainless steel.We made the modified electrode using the polyaniline film, which wasporous polymer film. The electrocatalysis characteristic of modified electrode wasstudied in a basic medium, and it was observed that polyaniline film disposed bytransition metal ion showed electrocatalysis for the oxidation of glucose. |
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