HPLC-DAD identification of compounds in corrosion inhibitor Salix alba bark extract and the hydrolate
Conference Object Open access M33
2025
Zdravković, Milica 
Savić Jovanović, Slađana
Grekulović, Vesna
Stanković, Dalibor
University of Belgrade - Technical Faculty in Bor
Proceedings [Elektronski izvor] - 56th International October Conference on Mining and Metallurgy - IOC 2025, 22-25 October, 2025, Bor Lake, Serbia
588
592
English
M33 - Conference paper at an international conference, printed in full
The compounds present in Salix alba bark (SAB) extract and its hydrolate were identified using highperformance liquid chromatography with diode array detection (HPLC-DAD). SAB extract and its hydrolate were obtained by evaporating a macerate of dried, ground white willow bark and hot distilled water. A total of 19 standard polyphenolic compounds were used for the HPLC analysis. Results indicate that only 4-hydroxybenzoic acid (4-HBA) was detected in the SAB hydrolate. In contrast, both gallic acid and caffeic acid were present in the SAB extract. The presence of 4-HBA indicates the potential possibility of using SAB hydrolate as a starting component for the synthesis of parabens and other 4-HBA derivatives. Additionally, the identification of gallic and caffeic acids in the SAB extract further confirms the effect as a cathodic inhibitor of copper corrosion in chloride environments, because both acids are proven cathodic inhibitors of copper in different corrosion environments.
white willow bark, HPLC, caffeic acid, gallic acid, 4-hydroxybenzoic acid
DOI
10.5937/IOC25588Z
ISBN
978-86-6305-164-5