Abstract
Artemisia herba-alba oil (AHAO) was obtained by hydrodistillation of the aerial parts of the plant and analyzed by GC and GC–MS. AHAO was tested as corrosion inhibitor of mild steel in 0.5 M H2SO4 solution using weight loss measurement and the stationary polarization curves. Results obtained indicate that the corrosion rate is reduced and AHAO adsorbs on the metal surface and then inhibits corrosion process. The highest inhibiting efficacy reached 88% at 298 K at 2.76 g L−1. The influence of the temperature (303–343 K) on the inhibition efficacy at different concentrations of AHAO was investigated. Thermodynamic data for AHAO inhibitor adsorption and mild steel corrosion led to suggest the occurrence of comprehensive adsorption physical adsorption for the inhibitor species on mild steel.
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