Study on Corrosion Inhibition Behavior of 5 - Cyclohexyl - 1,3,5 - Triazinane - 2 - Thione for 10 Steel in NH4Cl Solution

YIN Cheng-xian, BAN Xi-ling, ZHANG Juan-tao, XU Xiu-qing, WANG Yuan, FAN Lei, ZHANG Jun-ping

doi:10.16577/j.issn.1001-1560.2022.0097

2022 , Vol. 55 >Issue 4: 70 - 76

DOI: https://doi.org/10.16577/j.issn.1001-1560.2022.0097

Study on Corrosion Inhibition Behavior of 5 - Cyclohexyl - 1,3,5 - Triazinane - 2 - Thione for 10 Steel in NH4Cl Solution

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1. CNPC Tubular Goods Research Institute, Xi’an 710077, China; 2. State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials, Xi’an 710077, China;3. School of Chemistry and Chemical Engineering, Northwestern Polytechnical University, Xi’an 710129, China

Received date: 2021-10-26

Revised date: 2021-11-29

Accepted date: 2021-12-14

Online published: 2023-12-28

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Abstract

In order to suppress the corrosion of carbon steel in ammonium chloride solution during hydrocracking, the relevant corrosion inhibitor was studied. 5-cyclohexyl-1,3,5-triazinane-2-thione was synthesized using thiourea, formaldehyde and cyclohexanamine as raw materials, and its structure was characterized using FTIR and 1H NMR. The corrosion inhibition performance of the product for 10 carbon steel in 2% NH4Cl solution was studied by weight loss method and electrochemical method. Results showed that the corrosion inhibition performance of 5-cyclohexyl-1,3,5-triazine-2-thione on 10 steel in 2% NH4Cl solution increased with the increase of its addition, and decreased with the increase of temperature. Electrochemical results showed that the corrosion inhibitor behaved as a mixed inhibitory type inhibitor at low temperature or a cathodic inhibitory inhibitor at high temperature. The adsorption of 5-cyclohexyl-1,3,5-triazinane-2-thione on the surface of 10 steel in 2% NH4Cl solution obeyed the Langmuir adsorption isotherm, and the adsorption belonged to spontaneous and exothermic processes.

Key words： corrosion inhibitor; synthesis; electrochemical; adsorption isotherm; 10 steel

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YIN Cheng-xian, BAN Xi-ling, ZHANG Juan-tao, XU Xiu-qing, WANG Yuan, FAN Lei, ZHANG Jun-ping . Study on Corrosion Inhibition Behavior of 5 - Cyclohexyl - 1,3,5 - Triazinane - 2 - Thione for 10 Steel in NH4Cl Solution[J]. Materials Protection, 2022 , 55(4) : 70 -76 . DOI: 10.16577/j.issn.1001-1560.2022.0097

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