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Adsorption studies of water on copper, nickel, and iron using the quartz‐crystal microbalance technique: Assessment of BET and FHH models of adsorption
Author(s) -
Lee S.,
Staehle R. W.
Publication year - 1997
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.19970480203
Subject(s) - quartz crystal microbalance , adsorption , copper , nickel , metal , corrosion , relative humidity , inorganic chemistry , chemistry , quartz , materials science , analytical chemistry (journal) , metallurgy , environmental chemistry , thermodynamics , physics
In the atmospheric corrosion of copper, nickel, and iron, the adsorption of water affects the corrosion rates. Knowledge of water adsorption and metal oxyhydroxide formation is important in understanding the atmospheric corrosion process. The purposes of the present research were (1) to measure the adsorption of water on metal surfaces as a function of temperature and relative humidity (RH) and (2) to assess Brunauer‐Emmett‐Teller (BET) model and Frenkel‐Halsey‐Hill (FHH) model for water adsorption. In the present research, the quartz‐crystal microbalance (QCM) technique was used to measure the mass changes of copper, nickel, and iron at 0 to 100% RH and 7–90°C under nitrogen environments. Less water was adsorbed on copper, nickel, and iron which formed oxides than on gold. BET and FHH models could not fit the data points with single functional relationships. ΔH o adsvalues were calculated using modified BET method and they decreased with temperature.