Abstract. Carbon steel, the most widely used engineering material, despite its relatively limited
corrosion resistance used in large tonnages in marine applications, nuclear power transportation,
chemical processing , petroleum production and refining, pipelines, mining, construction and metalprocessing
equipment.
The main objective of the present work involved the study of the inhibitive properties of natural
product as spearmint plant extract as a safety and an environmentally friendly corrosion inhibitor
for low carbon steel in (3.5% NaCl) solution. Results showed when the immersion model in (3.5%
NaCl) solution that contains the inhibitor with concentration of (15% in volume), it s getting
decrease in lost weight , indicating a layer of adequate oxide on the surface of steel, indicating that
the amount of loss weight decrease with increasing concentration of inhibitor and this shows the
damper on his ability to form a protective layer .