Papaya leaves extract as a novel eco-friendly corrosion inhibitor for Cu in H2SO4 medium

Bochuan Tan; Bin Xiang; Shengtao Zhang; Yujie Qiang; Lihui Xu; Shijin Chen; Jiahong He

doi:10.1016/j.jcis.2020.08.093

Papaya leaves extract as a novel eco-friendly corrosion inhibitor for Cu in H₂SO₄ medium

J Colloid Interface Sci. 2021 Jan 15;582(Pt B):918-931. doi: 10.1016/j.jcis.2020.08.093. Epub 2020 Sep 6.

Authors

Bochuan Tan¹, Bin Xiang², Shengtao Zhang³, Yujie Qiang⁴, Lihui Xu⁵, Shijin Chen⁶, Jiahong He⁷

Affiliations

¹ School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China.
² School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China. Electronic address: xiangbin@cqu.edu.cn.
³ School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China. Electronic address: stzhang@cqu.edu.cn.
⁴ Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China. Electronic address: qiangyujie@nimte.ac.cn.
⁵ School of the Civil Engineering, Beijing Jiaotong University, Beijing 100044,China.
⁶ Bomin Electronics Ltd, Meizhou 514021, China.
⁷ School of Materials and Chemical Engineering, Chongqing University of Arts and Sciences, Yongchuan 402160, China. Electronic address: 20090005@cqwu.edu.cn.

PMID: 32942068
DOI: 10.1016/j.jcis.2020.08.093

Abstract

The papaya leaves were extracted via ultra-pure water. The obtained papaya leaves extract (PLE) was used as the eco-friendly inhibitor for Cu in the H₂SO₄ corrosion medium. The experimental results showed that PLE was a mixed-type inhibitor and exhibited excellent anti-corrosion nature over a certain temperature range. Morphological analysis test results at different temperatures strongly proved the anti-corrosion nature of PLE. The XPS test results found that an adsorption film of Cu-S bond and Cu-N bond was formed on the Cu surface. This barrier film conformed to Langmuir mono-layer adsorption. Corrosion kinetics and thermodynamic parameters were calculated and discussed.

Keywords: Copper; Corrosion inhibitor; Langmuir mono-layer adsorption; Papaya leaves extract; XPS.

MeSH terms

Carica*
Corrosion
Plant Extracts
Plant Leaves
Steel

Substances

Plant Extracts
Steel