المجلة الدولية للعلوم والتقنية

The aim of this work is to evaluate the corrosion resistance of C35 carbon steel in different corrosive environments, and the behavior of treated steel with boriding treatment in specific acidic and basic solutions (HCl, NaOH, HNO3 and H2SO4) and 5% NaCl solution. The behavior of treated steel in solutions of H2SO4, NaCl and HCl was appraised by two different methods: weight loss method after total immersion tests at different times from 24 hours up to 3 months, through curves of corrosion rate for weight loss method in terms of time. While the electrochemical method was carried out by experiments of Galvanostat Potontiostat device for a period of 30 minutes, and drawing Tafel and polarization curves. The results showed that the treated C35 steel was significantly affected by acidic environments, and the boron chemical treatment of the surface of steel samples showed its efficacy in improving corrosion resistance, especially in acidic environments (HCl and H2SO4). Keywords: Corrosion resistance, boride carbon steel C35, weight loss method, electrochemical method, Tafel curve, polarization curve.