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In order to evaluate the corrosion resistance of low infrared emissivity coating can estimate its life cycle , this paper Tafel polarization curves (Tafel), electrochemical impedance spectroscopy (EIS) electrochemical method , combined with the immersion test polyurethane as adhesives , copper powder , copper powder of a silane coupling agent , acrylic-modified copper powder as filler is polyurethane-based low infrared emissivity coating , an epoxy -modified polyurethane as a binder , copper powder , a silane coupling agent modified copper powder, acrylic acid-modified copper powder as the filler is an epoxy-modified polyurethane-based low infrared emissivity coatings as well as ethylene-propylene-diene rubber ( EPDM ) , maleic anhydride-modified EPDM ( of EPDM- g- MAH) for adhesives , copper powder packing of three series of low infrared emissivity coatings in simulated seawater environment (3.5wt.% NaCl solution ) electrochemical corrosion behavior , and with the open circuit potential (E ocp ), corrosion current density ( i corr ) coating resistance ( R , coat ) , coating capacitance (C coat ) , coating characteristic frequency (f b ) to the analysis and evaluation of the anti-corrosive coating of the same system can . The results show that : based on polyurethane low infrared emissivity coating , early in the immersion , the modified coatings showed better anti - corrosion , but the failure rate is accelerated with the immersion time, the modified coatings , unmodified paint throughout the soaking process the best anti- corrosive . However , in the course of long-term immersion , the hydrophilic group - COOH , -OC 2 < / sub> H 5 < / sub> , exists to promote the infiltration of water and accelerate the failure of the modified coating . Low infrared emissivity coating of epoxy modified polyurethane base early in the immersion coating of copper powder as filler showed better corrosion resistance , but with the immersion time, the failure rate to accelerate throughout the soaking process anti corrosion worst . After the acrylic modified copper powder as fillers and silane coupling agent modified copper powder filler showed better anti - corrosion coating during immersion . Bronze filled EPDM rubber group and a bronze filled maleic anhydride-modified EPDM rubber based low infrared emissivity coating in a short time early in the immersion corrosion medium can penetrate the interior of the two coatings coating showed weaker protection performance .
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