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Sebacic acid as corrosion inhibitor for hot‐dip galvanized (HDG) steel in 0.1 M NaCl
Author(s) -
Fedel Michele,
Poelman Mireille,
Olivier Marjorie,
Deflorian Flavio
Publication year - 2019
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.6617
Subject(s) - galvanization , sebacic acid , corrosion , corrosion inhibitor , chemistry , scanning electron microscope , dissolution , fourier transform infrared spectroscopy , electrochemistry , nuclear chemistry , metal , zinc , metallurgy , inorganic chemistry , materials science , layer (electronics) , chemical engineering , polymer chemistry , organic chemistry , composite material , electrode , engineering
The potential of sebacic acid as a corrosion inhibitor for hot‐dip galvanized steel in 0.1 M NaCl solution has been investigated. Different concentrations of the organic acid have been tested in order to understand the inhibition mechanism of the compound. The electrochemical test revealed a competitive mechanism between the dissolution of the metal in the acidified solution and the inhibition provided by the dicarboxylic species. The formation of a whitish layer consisting of zinc carboxylates and corrosion products was proved by means of scanning electron microscopy (SEM) investigation combined with Fourier transform infrared (FT‐IR) analysis. A bidentate bridging coordination between the Zn(II) and the carboxylic species is suggested.