CO and trans-cinnamaldehyde as corrosion inhibitors of I825, L80-13Cr and N80 alloys in concentrated HCl solutions at high pressure and temperature

Autor:	Angel Cuesta, Chad E. Kiser, Juanita M. Cassidy, Jim L. Lane, Gary P. Funkhouser, Gema Cabello
Rok vydání:	2013
Předmět:	Chemistry Formic acid General Chemical Engineering Inorganic chemistry Electrolyte Cinnamaldehyde Corrosion Ferrous Metal Corrosion inhibitor chemistry.chemical_compound visual_art Electrochemistry visual_art.visual_art_medium Incoloy
Zdroj:	Digital.CSIC. Repositorio Institucional del CSIC instname
Popis:	In this paper, corrosion inhibition by chemisorbed CO, at high pressure and temperature, on a high-Ni ferrous alloy (Incoloy 825) and two high-Fe alloys (13Cr-L80 (Uniloy-420) and N80 steels) in very aggressive conditions (15% (w/w) HCl solution) is described. CO was either directly dosed into the electrolyte, or produced by dehydration of formic acid. It is shown that CO is a very good corrosion inhibitor, the inhibiting effect being even higher at high pressure and temperature than at normal pressure and room temperature. The effect of combining CO with a common acid corrosion inhibitor, trans-cinnamaldehyde (TCA), at high pressure and temperature, was also studied. Under these conditions, the polymerization of TCA may be favored, leading to a thin film on the metal surface that appears to serve as a barrier to corrosion. It was found that, when CO is used in combination with TCA, the inhibiting effect of the latter is considerably intensified. © 2013 Elsevier Ltd. All rights reserved.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5978418e36f2e981bbfc6fdde535dc95 http://hdl.handle.net/10261/169293 Zobrazit plný text záznamu