Inhibition of corrosion in steel water pipes by ammonium pyrrolidine dithiocarbamate (APDTC)

In this work, corrosion inhibition in steel water pipes, used in Jordan National Water Supply Network (JNWSN), is studied in different corrosive media by adsorption of ammonium pyrrolidine dithiocarbamate (APDTC) on the surface of the pipes. APDTC is a nontoxic material widely used in agricultural applications. The experimental work utilized mainly weight loss experiments and UV-visible spectrophotometeric analysis. The effect of the corrosive solution concentration, APDTC concentration and immersion period on the corrosion inhibition efficiency of APDTC are studied and fully interpreted. Weight loss experimental results indicate that inhibitor efficiency (%P) increases with increasing the inhibitor concentration and the immersion period. The inhibitor efficiency decreases with increasing the concentration of the corrosive solutions. The inhibitor efficiency is checked determining the concentrations of Fe2+ and APDTC in the solutions.