Research of mold erosion of alkyd resin coating and the effect of chlorothalonil on the mouldproof properties

The impact of mold erosion on the appearance and performance of alkyd resin coating used in aviation and the inhibition of fungicide (chlorothalonil, TPN) added to the coatings were studied through mold test. The mildew situation of coatings were observed by using stereo microscope. The morphology of the coatings removal of mold were investigated by using scanning electron microscopy (SEM) and atomic force microscope(AFM). The change of corrosion resistance of the coatings were studied by electrochemical impedance spectroscopy (EIS). The results demonstrated that mildew situation is related to mold test time and the amount of TPN. With the mold test time increased, The roughness and the undulation of the coating microscopic surface increased, the pit corrosion generated in the thick region of the mold growth. Corrosion resistance of coating dropped significantly.