Abstract
The importance of nickel as a basic material for corrosion-resistant alloys and its catalytic properties with respect to many organic reactions are well recognized. Due to its excellent corrosion resistance when used in the commercial or pure form, it is frequently used as an alloying element. A number of papers have been written that deal with the corrosion inhibition of nickel and its alloys in aqueous acid solutions using organic and inorganic compounds. The choice of the inhibitor is based on two considerations. Firstly, it can be synthesized conveniently from relatively-cheap raw materials; secondly, the presence of an electron cloud on the aromatic ring, the electronegative nitrogen, oxygen atoms, and the relatively-long chain compound in aqueous acid medium are likely to induce greater adsorption of the compound on the metal surface promoting effective inhibition. The aim of the present investigation is to study the corrosion kinetics of nickel as an electrode and its alloys (Inconel 600 and Incoloy 800) in deaerated H2SO4 solutions, and the effect of addition of dihydrzide derivatives of malonic, succinic, and adipic acids on the corrosion of nickel and its alloys in 1M H2S04.