Izvorni znanstveni članak
Influence of Paper Surface Compounds on Corrosion of Printing Machines
Krešimir Dragčević
; Faculty of Graphic Arts, University of Zagreb, Croatia
Ante Poljičak
; Faculty of Graphic Arts, University of Zagreb, Croatia
Sažetak
This paper deals with investigation of corrosion processes on construction steel
in contact with aqueous solutions of surface coatings of high gloss and standard
uncoated papers for sheet-fed printing. During the period of four months, changes
in the mass of steel specimens were measured (loss of material), as well as changes
in pH values and conductivity of the examined solutions. Formation of corrosion
products on the surface was identified by changes of spectrophotometric reemission
in the visible portion of the steel spectrum and by FT-IR spectral recordings.
In addition, the electrochemical potentiodynamic measurements were carried out
with the direct current and the method of linear polarization and Tafel’s extrapolation,
by which the corrosion parameters were determined: corrosion potential,
corrosion current density, polarization resistance cathodic and anodic inclination
of Tafel’s lines, as well as the corrosion rate.
The results show that the dynamics of the corrosion in printing machines is directly
influenced by the type of the paper used for printing. This investigation gave an insight
into dynamics and mechanisms of corrosion under conditions close to those
in printing production, thus facilitating better understanding of the entire process.
Ključne riječi
Corrosion; Steel; Paper Coatings; FT-IR; Linear Polarization; Tafel’s Extrapolation
Hrčak ID:
101940
URI
Datum izdavanja:
13.12.2012.
Posjeta: 734 *