Corrosion Inhibition of Mild Steel in Acidic Media Using a Nanomagnetic Fluid as a Novel Corrosion Inhibitor

CORROSION INHIBITION OF MILD STEEL IN AN ACIDIC MEDIA USING NANOMAGNETIC FLUID AS A NOVEL APPROACH TO CORROSION RESISTANCE

Smita Jauhari^a , Kinnari Parekh^b

^aSardar Vallabhbhai National Institute of Technology,Surat, India

^bDepartment of Physics, Indian Institute of Technology,Gandhinagar,India

ABSTRACT

Nanomagnetic fluid, a novel material comprising of ferromagnetic nanoparticle has been evaluated as a corrosion inhibitor .Corrosion behaviour of carbon steel in 1M HNO₃ has been studied as a function of various concentration of aqueous nanomagnetic fluid . The novel nanomagnetic fluid has been specially synthesized to achieve the stability in acidic media when it is mixed with HNO_{3 .} This nanomagnetic fluid has been evaluated by gravimetric and polarization measurement  techniques. It was observed that the inhibition efficiency increases with the increase in the nanomagnetic fluid concentration and reaches the maximum at the optimum concentration. This is further confirmed by the decrease in the corrosion rate. It is found that the system follows Temkin adsorption isotherm.