Abstract
In this paper, a new doping concept has been improved which shows self-healing properties by sustained release of corrosion inhibitors in a carrier system. The anti-corrosive properties of (AA2014) aluminium alloy was tested by electrochemical impedance spectroscopy. The sol-gel coating doped with both inorganic and organic inhibitors gives a satisfying result. Releasing the event of inhibitor depends on the pH value of the corrosion environment. The barrier properties of the best coating divulge by high pore resistance with having high impedance value at low frequency. The immersion test confirmed that double doping concept is valuable also for long immersion test.
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