▎ 摘　　要

The inorganic nanofiller tantalum carbide (TaC) was modified with 4-amino-N-[2-(dimethylamino)ethyl]benzene-1-sulfonamide (AEABS) and the resultant AEABS/TaC was encapsulated with graphene oxide (GO) in the epoxy resin (EP). The protection behaviour of the epoxy coated mild steel in the presence of various amount of GO enveloped with functionalized tantalum carbide was analyzed by EIS and SECM in seawater. The EIS measurements proved that the EP-GO/AEABS-TaC had an increased coating resistance of 10812.45 k ohm.cm2, even after 960 h submerged in seawater. The surface resistance of the EP-GO/AEABS-TaC was also found to be more than 75.3 % times higher than the pure EP after exposed to seawater for 1 h. SECM investigations showed that the lowest ferrous ion dissipation occurred at the EP-GO/AEABS-TaC nanocomposite coated steel (1.1 I/nA). FESEM/EDX investigated that modified tantalum carbide was enhanced in the corrosion products that produced a strong passive coating layer. The new EP-GO/AEABS-TaC coating had superior hydrophobic properties (WCA: 168 degrees). The inclusion of AEABS/TaC wrapped in graphene oxide in the epoxy bed showed excellent mechanical properties. For mild steel coated with EP-GO/AEABS-TaC, an enhanced adhesive strength was obtained prior to seawater immersion (15.8 MPa). The structure of GO/AEABS-TaC develops a strong crystalline passive coating, which blocks the penetration of ions reaching the specimen. This causes the improved adhesion strength and the coating becomes intact even prolonged contact with the electrolytes. This newly created EP-GO/AEABS-TaC coating has potential as a coating material for components utilized in the shipbuilding industry.