Synthesis of a polyaspartic acid/4-(2-aminoethyl) morpholine graft copolymer and evaluation of its scale and corrosion inhibition performance

A novel modified polyaspartic acid polymer, polyaspartic acid/4-(2-aminoethyl) morpholine graft copolymer (PASP/AEM), was prepared through a ring-opening reaction of polysuccinimide and 4-(2-aminoethyl) morpholine and characterized by 1 H NMR. The scale inhibition performance of this copolymer and its ability to disperse Fe 2 O 3 were investigated in static tests. Scanning electron microscopy and X-ray powder diffraction were used to analyze the effects of PASP/AEM on scale formation. The performance and mechanism of corrosion inhibition by the synthesized copolymer were studied via weight loss measurements and electrochemical measurements. The results showed that PASP/AEM possessed outstanding scale and corrosion inhibition efficiencies and had potential for use as a green scale and pickling inhibitor.