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The protective action of two vapour phase inhibitors on the corrosion of mild steel
Author(s) -
Bastidas J. M.,
Mora E. M.,
Feliu S.
Publication year - 1990
Publication title -
materials and corrosion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.487
H-Index - 55
eISSN - 1521-4176
pISSN - 0947-5117
DOI - 10.1002/maco.19900410605
Subject(s) - corrosion , electrochemistry , relative humidity , materials science , isothermal process , adsorption , ammonium , vapor phase , phase (matter) , water vapor , nitrite , moisture , dual phase steel , metallurgy , inorganic chemistry , chemistry , composite material , electrode , organic chemistry , microstructure , meteorology , nitrate , martensite , physics , thermodynamics
The action of two vapour phase inhibitors (VPI), dicyclohexyl‐ammonium nitrite (DICHAN) and dicyclohexylamine (DICHAMIN), on the atmospheric corrosion of mild steel at a relative humidity of 100% and under isothermal conditions (25 °C) has been studied. In order to obtain electrochemical data with thin adsorbed moisture layers a vapour phase inhibitor monitor (VPIM) was developed. A check of the data was done by three electrochemical techniques and by the image analysis technique. The tests carried out have revealed that the corrosion rate of mild steel decreases in the presence of DICHAN and DICHAMIN. With the VPIM and the electrochemical techniques used it is possible to understand the inhibition mechanism of these two vapour inhibitors on the atmospheric corrosion of steel.