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

2020; Elsevier BV; Volume: 582; Linguagem: Inglês

10.1016/j.jcis.2020.08.093

1095-7103

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

Electrodeposition and Electroless Coatings

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.