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Technical Note: Cyclohexylamine Carbonate as Vapor Phase Inhibitor for Nd-Fe-B Magnet
X. Zhang; Y. T. Ma; Y. Li; M. K. Lei; F. H. Wang
2013
Source PublicationCorrosion
ISSN0010-9312
Volume69Issue:7Pages:647-654
AbstractThe efficiency of cyclohexylamine carbonate (CHC) as a vapor phase inhibitor for a Nd-Fe-B magnet in the simulated atmospheric environments as well as under thin electrolyte layers was investigated using scanning electron microscopy (SEM) and electrochemical methods. SEM results suggested that CHC was an effective vapor phase inhibitor for Nd-Fe-B subjected to a 7-day exposure in the simulated atmospheric environments, and the Nd-rich phase was also soundly protected. Polarization and electrochemical impedance spectroscopy (EIS) measurements indicated that CHC was an anodic type of inhibitor for Nd-Fe-B, and the inhibition efficiency can reach a relatively high value. The corrosion inhibition mechanism was studied through IR spectroscopy and the potential of zero charge (PZC) measurements. IR spectra analysis demonstrated that physisorption played a main role in the process of adsorbing CHC. PZC tests indicated that the Nd-Fe-B surface carried negative charges at free corrosion potential. The corrosion inhibition of CHC was achieved by physisorption of protonated amine on the negatively charged Nd-Fe-B surface via electrostatic attraction.
description.department[zhang, x. ; ma, y. t. ; li, y. ; wang, f. h.] chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china. [zhang, x. ; lei, m. k.] dalian univ technol, dept mat sci & engn, surface engn lab, dalian 116023, peoples r china. ; li, y (reprint author), chinese acad sci, state key lab corros & protect, inst met res, shenyang 110016, peoples r china. ; liying@imr.ac.cn
KeywordCyclohexylamine Carbonate Inhibition Mechanism Nd-fe-b Potential Of Zero Charge Vapor Phase Inhibitor Volatile Corrosion-inhibitors Ndfeb Permanent-magnets Mild-steel Part i Behavior Media Acid Eis
URL查看原文
Language英语
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/71693
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
X. Zhang,Y. T. Ma,Y. Li,et al. Technical Note: Cyclohexylamine Carbonate as Vapor Phase Inhibitor for Nd-Fe-B Magnet[J]. Corrosion,2013,69(7):647-654.
APA X. Zhang,Y. T. Ma,Y. Li,M. K. Lei,&F. H. Wang.(2013).Technical Note: Cyclohexylamine Carbonate as Vapor Phase Inhibitor for Nd-Fe-B Magnet.Corrosion,69(7),647-654.
MLA X. Zhang,et al."Technical Note: Cyclohexylamine Carbonate as Vapor Phase Inhibitor for Nd-Fe-B Magnet".Corrosion 69.7(2013):647-654.
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