The inhibition of hydrogen embrittlement in SAE 4340 steel in an aqueous environment with the rare earth compound lanthanum 4 hydroxy cinnamate
Hinton, B. R. W., Behrouzvaziri, M., Forsyth, M., Gupta, R. K., Seter, M. and Bushell, P. G. 2012, The inhibition of hydrogen embrittlement in SAE 4340 steel in an aqueous environment with the rare earth compound lanthanum 4 hydroxy cinnamate, Metallurgical and materials transactions A, vol. 43, no. 7, pp. 2251-2259.
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The inhibition of hydrogen embrittlement in SAE 4340 steel in an aqueous environment with the rare earth compound lanthanum 4 hydroxy cinnamate
A preliminary study showed that the inhibitor lanthanum 4-hydroxy cinnamate ((La4OHcin)3) at a concentration of 400 ppm prevented the hydrogen embrittlement (HE) of SAE 4340 steel tensile specimens when tested under slow strain rate conditions in a 0.01M NaCl. In the presence of the inhibitor, a complex film formed on the surface of specimens during the slow strain rate test (SSRT), and no corrosion pits were detected. Electrochemical polarization studies indicated that the La(4OHcin)3 acted as an anodic inhibitor in the NaCl solution. This article also discusses the mechanism of HE inhibition by La(4OHcin)3.
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eng
Field of Research
090403 Chemical Engineering Design
Socio Economic Objective
970103 Expanding Knowledge in the Chemical Sciences