Mechanical Properties and Corrosion Behavior of Different Coatings Fabricated by Diglycidyl Ether of Bisphenol-A Epoxy Resin and Aradur?-3282 Curing Agent

摘要

Fabrication of four blend samples of diglycidyl ether of bisphenol-A (DGEBA) epoxy resin cured byphysical mixing with Aradur-3282 polyamidoamine adducts (Aradur-PA3282) as a curing agent atambient temperature has been reported. The thermal degradation, mechanical properties and corrosionbehavior of these fabricated DGEBA-PA3282 samples were investigated. Composition of coatings wasconfirmed using Fourier-transform infrared spectroscopy attenuated total reflectance (FT-IR-ATR).Scratch tester, mandrel bend, cross hatch tester, and pendulum hardness measurements were employedto report the mechanical properties of the different coatings. Corrosion tests were carried out for coatedsteel coupons after their immersion in 3.5 wt.% sodium chloride solutions for 1 h and 7 days. Allfabricated coatings have excellent thermal and mechanical properties. Electrochemical impedancespectroscopy measurements indicated that the different DGEBA-PA3282 epoxy samples can beemployed as protective coatings against corrosion in the freely aerated 3.5 wt.% NaCl solutions.