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Food Spices 2,5-Dihydroxy-1,4-dithiane as an Eco-friendly Corrosion Inhibitor for X70 Steel in 0.5 mol/L H2SO4 Solution |
TAN Bochuan1, ZHANG Shengtao1( ), LI Wenpo1, XIANG Bin1, QIANG Yujie2 |
1.School of Chemistry and Chemical Engineering, Chongqing University, Chongqing 400044, China 2.Key Laboratory of Marine Materials and Related Technologies, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China |
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Abstract The corrosion inhibition performance of 2,5-Dihydroxy-1,4-dithiane (DDD) for X70 pipeline steel in 0.5 mol/L sulfuric acid solution was studied via experimental and theoretical means. Electrochemical experimental data show that DDD can effectively inhibit the corrosion of X70 steel in sulfuric acid solution. The corrosion inhibition efficiency of DDD can reach 93.6% at 298 K. In addition, DDD can still exhibit good corrosion inhibition performance at higher temperatures. The adsorption of DDD on the surface of X70 steel is consistent with Langmuir single layer adsorption. Results of quantum chemical calculation and molecular dynamics simulation also proved the above adsorption and inhibition mechanism of DDD on steel deduced from experimental results.
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Received: 11 June 2020
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Fund: National Natural Science Foundation of China(21878029);Chongqing Graduate Student Research Innovation Project(CYB19032);Sail Plan of Guangdong, China(2015YT02D025) |
Corresponding Authors:
ZHANG Shengtao
E-mail: stzhangcqu@163.com
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About author: ZHANG Shengtao, E-mail: stzhangcqu@163.com
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