Study on Corrosion Inhibition Behavior of Photinia Leaf Extracts for Q235 Steel in HCl Medium

CHEN Shujun, TAO Aining, ZHANG Hai, YUAN Longfei, CHEN Siyi, YANG Fang

doi:10.16577/j.issn.1001-1560.2024.0033

Materials Protection >

2024 , Vol. 57 >Issue 2: 51 - 57

DOI: https://doi.org/10.16577/j.issn.1001-1560.2024.0033

Study on Corrosion Inhibition Behavior of Photinia Leaf Extracts for Q235 Steel in HCl Medium

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(a.School of Chemistry and Chemical Engineering，b.School of Physics and Electronic Science，Zunyi Normal University，Zunyi 563000，China)

CHEN Shujun(1990-)， Ph.D.， Associate Professor， Research Focus: Metal Corrosion and Protection， Tel.:18311692019，E-mail: shujunchen_znu＠163.com

Received date: 2023-04-17

Revised date: 2023-06-08

Accepted date: 2023-06-20

Online published: 2024-03-08

Supported by

National Natural Science Foundation of China (22065041)； Guizhou Provincial Science and Technology Projects (ZK[2022]569)；Science Research Project of Guizhou Department of Education (KY[2012]017-16，KY[2020]098，KY[2018]004)；Science Research Project of Zunyi Science and Technology (HZ [2021]205，HZ[2018]5784-02)； Science Research Project of Zunyi Normal University (BS[2019]11， XM[2021]1-6)； College Student Innovation and Entrepreneurship Training Program of Guizhou Province (202110664025，S202110664027)

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Abstract

For obtaining environment-friendly and efficient green corrosion inhibitors， the photinia leaf extracts (PTF) were prepared by distilled water reflux method.The corrosion inhibition performance of PTF on Q235 steel in 1 mol/L hydrochloric acid was studied using electrochemical tests， weight loss tests， scanning electron microscopy and other methods.Results showed that as a mixed corrosion inhibitor， PTF could effectively inhibit the corrosion of Q235 steel in hydrochloric acid medium.The corrosion inhibition efficiency increased with the increase of PTF concentration and decreased with the increase of solution temperature.Furthermore， the inhibition efficiency of 4 g/L PTF was 87.99%at 293 K.The results of adsorption isotherm model showed that PTF could spontaneously adsorb on the surface of Q235 steel through physical effects， which conformed to the Langmuir single-layer adsorption model.

Key words： HCl; corrosion inhibition; Q235 steel; photinia leaf extract; adsorption model

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CHEN Shujun, TAO Aining, ZHANG Hai, YUAN Longfei, CHEN Siyi, YANG Fang . Study on Corrosion Inhibition Behavior of Photinia Leaf Extracts for Q235 Steel in HCl Medium[J]. Materials Protection, 2024 , 57(2) : 51 -57 . DOI: 10.16577/j.issn.1001-1560.2024.0033

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