ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

The performance of complex corrosion inhibitor CFPS-Tb³⁺ for aluminum alloy

Jia Wang and Jin-yan Liu

College of Chemistry and Chemical Engineering, Inner Mongolia University of Science & Technology, Baotou, China

E-mail: liujinyan2007@163.com

Received: 3 January 2022  Accepted: 27 January 2022

Abstract:

The objective of this paper was to study the complex formed by antibiotics drugs and rare earth ions, which was used as corrosion inhibitors. The complex would be excellent corrosion inhibitor for the surface of aluminum alloy immersed in 3.5% NaCl solution at 30 °C. The corrosion inhibition performance and surface morphology of aluminum alloy with different concentrations of cefoperazone sodium (CFPS), Tb³⁺ and their mixed solution were studied by weight loss measurement, electrochemical measurement, scanning electron microscope (SEM), atomic force microscope (AFM), contact angle test and X-ray photoelectron spectroscopy (XPS). When CFPS and Tb³⁺ were mixed at 1:2, the optimal corrosion inhibition efficiency can reach more than 90%, indicating that the complexes at this point formed more compact adsorption film prevent corrosion on the surface of the aluminum alloy. The results of surface morphology test suggested that the metal surface with CFPS-Tb³⁺ was most smooth among the inhibitors of CFPS, Tb(NO₃)₃ and their complex CFPS-Tb³⁺. The complexes adhered to the metal surface and inhibited corrosion. Tb³⁺ and CFPS as corrosion inhibitors not only could reduce the amount of rare earth, but also had better effect on aluminum alloy. In conclusion, the booming of the green metal corrosion inhibitors is expected to be promoted.

Graphical abstract

Keywords: Cefoperazone sodium; Rare earth Tb3+ ion; NaCl; Corrosion inhibition performance

Full paper is available at www.springerlink.com.

DOI: 10.1007/s11696-022-02114-2

Chemical Papers 76 (6) 3507–3520 (2022)