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Characterization of the Interactions of vapour phase inhibitors on metal surfaces by ellipsometry
Author(s) -
Reinhard Georg,
Künzelmann Ulrich
Publication year - 1987
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.19870380303
Subject(s) - ellipsometry , relative humidity , isothermal process , metal , adsorption , chemistry , corrosion , inorganic chemistry , phase (matter) , oxide , nitrite , platinum , ammonium , water vapor , materials science , catalysis , organic chemistry , nitrate , nanotechnology , thermodynamics , thin film , physics
The interaction of dicyclohexyl ammonium nitrite (DICHAN) and dicyclohexylamine (DICHAMIN) on substrates of pure iron and platinum were investigated by ellipsometry. The initial immersion phase (≤ 100 min) under isothermal conditions (20°C) in air of relative humidity (RH) = 0 or (RH) = 100% was investigated. It is shown, that DICHAN is intensively adsorbed on the primary oxide layer of iron materials and causes effective hydrophobing. DICHAMIN to a lower extent decreases the adsorbability of water and when influenced by air of (RH) = 0%, it is completely desorbed. On the basis of the results presented, the actual views on the active principles of vapour phase inhibitors of the iron materials' atmospheric corrosion are defined.