Inhibition of carbon steel corrosion in phase-change-materials solution by methionine and proline

Zhang, ZheMittuniversitetet,Avdelningen för kemiteknik,Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, China (author)

Funding Details: 2013GXNSFBA, Guangxi Natural Science Foundation
Inhibition of the 1045 carbon steel corrosion by methionine and proline in PCMs solution have been investigated. Electrochemical measurements show that these inhibitors can protect steel against corrosion, with a maximal protection efficiency up to 95.0% by methionine/proline compound inhibitor at molar ratio equal to 5:3. All inhibitors act as anodic-type inhibitor. FESEM, EDS, XRD characterization indicates that the corrosion of steel starts from pitting corrosion of Cl− ion, and gradually evolves into a general corrosion. The NH4FePO4·nH2O, Fe2O3 are the main corrosion products. XPS study confirms that Met and Pro molecule can adsorb on steel surface and form inhibition films. The inhibition mechanism was further investigated through theoretical modeling studies.

Tian, N.Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, China (author)
Zhang, WennanMittuniversitetet,Avdelningen för kemiteknik(Swepub:miun)wenzha (author)
Huang, X.Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, China (author)
Ruan, L.Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin, China (author)
Wu, L.School of Chemistry and Chemical Engineering, Shandong University, Jinan, China (author)
MittuniversitetetAvdelningen för kemiteknik (creator_code:org_t)

By the author/editor: Zhang, Zhe; Tian, N.; Zhang, Wennan; Huang, X.; Ruan, L.; Wu, L.

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