Inhibition of corrosion of mild steel hull plates immersed in natural sea water by sandalwood oil extract of some natural products

The hull plates of the ship made mild steel (MS) are always in contact with seawater aggressive ions such as chloride present seawater.The corrosion resistance has been investigated by polarization study. Sandalwood oil extract containing 5 g each Cardamom (disambiguation), Clove Nutmeg, India Sambrani (loban), Chrysopogon zizanioides, commonly known vetiver and Camphor was used inhibitor along Trisodium citrate (TSC), sodium dihydrogen phosphate (SDP) Zn2+. measured absence presence various systems: (TSC) 100 ppm+ Zn2+ 50ppm system, Oil coated (3days) MS, MS +TSC 50 ppm system +SDP100 were used. It is observed that when immersed SW+TSC , increases. When SW+ SDP Sea water (3 days) This revealed fact there increase LPR value decrease current value. potential shifted to anodic side. indicates this reaction metal dissolution controlled predominantly. implies these systems may be on surface prevent sea water.