Eco-friendly Bladder wrack extract as a corrosion inhibitor for thermal desalination units during acid cleaning process

Abstract

Abstract To strengthen the thermal desalination units and sustainability of their performance and reduce their corrosion during acid cleaning processes to remove the scale layers, economy and nontoxic strategies are needed. Here we clarify how Bladder wrack extract (BWE) can reduce the corrosion mitigations for thermal units (carbon steel part) during the acid cleaning (1.0 M HCl). We find that the performance of BWE extract reached an excellent value (94.2%) at 500 ppm. The rate of electrochemical reactions is very low in the presence of BWE extract, and is consistent with the mass loss method. The activity of BWE extract as a corrosion inhibitor is due to the presence of mixture of organic compounds inside the extract. These compounds were identified by HPLC, SEM and FT-IR analysis.