An X-ray photoelectron spectroscopy and electrochemical study of the self-assembled monolayer phytic acid on the 430 stainless steel in NaCl solution

Purpose – The self-assembled monolayers (SAMs) of inositol hexakisphosphoric (IP6) formed in NaCl solution at room temperature on the surface of Type 430 stainless steel (SS430) were studied. The paper aims to discuss these issues. Design/methodology/approach – The corrosion inhibition behavior of the SAMs was examined by electrochemical polarization curves, and surface characterizations were studied by X-ray photoelectron spectroscopy. Findings – The results showed that the IP6 molecules were adsorbed successfully on the SS430 surface and demonstrated the capability of corrosion inhibition. A maximum IE value of 71.81 percent was achieved due to co-adsorption of water. The SS430 electrodes exposed to media containing 5×10−3 mol/L of IP6 exhibited the best anti-corrosive performance. Originality/value – The present paper will report for the first time the adsorption and corrosion inhibition performances of IP6 SAMs on the SS430.