Abstract
A study has been made on the mechanism of corrosion of mild steel and the effect of nitrilo trimethylene phosphonic (NTMP) acid as a corrosion inhibitor in acidic medium, that is, 10% HC1 using the weight loss method and electrochemical techniques, that is, potentiodynamic and galvanostatic polarization measurements. Although corrosion is a long-time process, but it takes place at a faster rate in the beginning which goes on decreasing with due course of time. The above-mentioned methods of corrosion rate determination furnish an average value for a long-time interval. Looking at the versatility and minimum detection limit of the voltammetric method, the authors have developed a new voltammetric method for the determination of corrosion rate at short-time intervals. The results of corrosion of mild steel in 10% HC1 solution with and without NTMP inhibitor at short-time intervals have been reported. The corrosion inhibition efficiency of NTMP is 93% after 24 h.
Highlights
Mild steel is a major material of construction
In the present paper we have studied the action and effectiveness of nitrilo trimethylene phosphonic acid (NTMP) as inhibitor for corrosion of carbon steel in (10% HCl) acid solution
The data obtained for the periods A1 and B suggest that solution corrosiveness increases in the base solution (10% HCl) while in the presence of NTMP it decreases (B < A1)
Summary
Mild steel is a major material of construction. It is extensively used in chemical and allied industries for handling alkalis, acids, and salt solutions [1].
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