Erna, MariaEmriadiAlif, AdminArief, Syukri2014-03-102014-03-102014-03-10wahyu sari yenihttp://repository.unri.ac.id/xmlui/handle/123456789/5834The effect of chitin and chitosan on the corrosion of mild steel in peat water was studied using weight loss methods. It was found that corrosion inhibition efficiency depended on peat water pH, inhibition technique and interaction time. The results show that inhibition efficiency of chitin and chitosan i.e. 81.71% and 88.73%. The inhibition was assumed to occur via physicsorption of the chitin and chitosan molecules on the metal surface. The Langmuir adsorption isotherm was tested for their fit to the experimental data. The apparent activation energies for the corrosion reaction was determined using Arrhenius plots for the steel corrosion rateenActivation energyAdsorption isothermChitin and ChitosanInhibitionefficiencyWeight lossUR-Scientific Work Lecturer