Lactobionic Acid as a New Synergist in Combination with Phosphonate–Zn(II) System for Corrosion Inhibition of Carbon Steel

Rao S. Srinivasa^1,^*, Rao B.V. Appa², Kiran S. Roopas³, Sreedhar B.⁴

Fig. 4. Potentiodynamic polarization curves for carbon steel in 200 mg L -1 NaCl environment in the absence and presence of various inhibitor components: a no inhibitor; b PBTC 20 mg L -1 + Zn 2+ 20 mg L -1 ; c PBTC 20 mg L -1 + LBA 30 mg L -1 ; d Zn 2+ 20 mg L -1 + LBA 30 mg L -1 ; e PBTC 20 mg L -1 + Zn 2+ 20 mg L -1 + LBA 30 mg L -1 .