Bis-Schiff bases of 2,2'-dibromobenzidine as efficient corrosion inhibitors for mild steel in acidic medium.

In this work, three new bis-Schiff bases, namely 1,1'-(2,2'-dibromo-[1,1'-biphenyl]-4,4'-diyl)bis(-phenylmethanimine) (BNSB01), 1,1'-(2,2'-dibromo-[1,1'-biphenyl]-4,4'-diyl)bis(-(4-bromophenyl)methanimine) (BNSB02) and 4,4'-(((2,2'-dibromo-[1,1'-biphenyl]-4,4'-diyl)bis(methanylylidene))bis(azanylylidene))diphenol (BNSB03), were synthesized. These Schiff bases were evaluated for their corrosion inhibition ability on mild steel specimens in 0.5 M HCl by using electrochemical and weight loss techniques.