Inhibition of mild steel by strontium chromate in artificial acid rain solution

Abstract

The inhibition of mild steel in an artificial acid rain solution (pH 4 . 5) in low concentrations of strontium chromate pigment has been evaluated using a range of methods: potentiodynamic polarisation, electrochemical impedance, X-ray photoelectron spectroscopy and solution analysis. The individual effects of strontium and chromate have been evaluated and have been used to estimate inhibitor efficiency and film composition, and to determine the possible inhibition mechanism. The results show that, at low concentration, strontium chromate affects the cathodic reaction, with reduction of Cr 6z to Cr 3z , and the surface film was composed of magnetite and hydrated chromium hydroxide. The presence of strontium was not found significantly to affect the inhibitory performance.

The Adsorption Behavior of Thiazole on the Surface of Carbon Steel in Heterogeneous Solution

“…Carbon steel is commonly used because of its low cost and excellent mechanical properties. However, it suffers severe corrosion in various environments [1], particularly in acidic, oil and gas production systems. In this heterogeneous system, acidic gas like H 2 S or CO 2 is the main course arising corrosion.…”