EFFECT OF DIFFERENT CONCENTRATION OF SODIUM CHLORIDE SOLUTION ON THE CORROSION OF STEEL FOR DIFFERENT PERIODS OF TIME

EFFECT OF DIFFERENT CONCENTRATION OF SODIUM CHLORIDE SOLUTION ON THE CORROSION OF STEEL FOR DIFFERENT PERIODS OF TIME

Yousef. A . Adwady¹           Alhadi Mohammed Hadeeyah²         Kamal Miftah Abduljalil³

Higher Institute of Marine Sciences Techniques – Sabratha^1-2-3

you2012sif@gmail.com¹

Abstract

In this research, the effect of sodium chloride on the corrosion rate was studied. Four square samples were prepared and their dimensions were accurately determined. The samples were 2 cm long, 2 cm wide, and 0.2 cm thick. Thus, the surface area of the samples was calculated. The weights of the samples were taken accurately using a sensitive balance before the immersion process was carried out. Also, different concentrations of sodium chloride were prepared and the concentrations were as follows (45%, 65%, 85%, 90%). Then the samples were immersed for different periods of time (4, 8, 12, 18, 30 hours). The corrosion rate of the samples was measured using the corrosion law. It was found that increasing the concentration ratio to the solution leads to a decrease in the metal’s resistance to corrosion and that increasing the solution concentration led to an increase in the metal’s corrosion rates. Resistance of corrosion changes with the change in the concentration of the medium and with the continuation of the exposure time. The importance of this research lies in knowing the behavior of the metal when exposed to a corrosive medium, and knowing the applied methods that are used to calculate the corrosion rate.

Key words- solution, the exposure time, concentration ratio, sodium chloride