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Corrosion behaviour of steel/55%Al–Zn alloy/paint systems exposed to natural and artificial environments
Author(s) -
Elsner Cecilia I.,
del Amo Delia B.,
Hernández Luis S.,
Di Sarli Alejandro R.
Publication year - 2014
Publication title -
the canadian journal of chemical engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.404
H-Index - 67
eISSN - 1939-019X
pISSN - 0008-4034
DOI - 10.1002/cjce.21874
Subject(s) - alkyd , corrosion , epoxy , alloy , materials science , weathering , metallurgy , composite material , geology , coating , geomorphology
The corrosion performance of steel/55%Al–Zn alloy sheets pre‐treated with 5% Fe (NO 3 ) 3 + 15% H 3 PO 4 solution, and then coated with acrylic (AC), alkyd (AQ), vinyl (VL), solvent‐based epoxy (ES) or waterborne epoxy (EA) corrosion‐inhibiting primers + a barrier topcoat alkyd paint was studied. Exposure conditions included weathering chambers and natural atmospheres (La Plata‐Argentina and San Luis‐Potosí, México). The panels' behaviour was evaluated through visual inspections and EIS measurements. Their results allowed inferring that: (1) most of the painting systems have a satisfactory performance during their exposure to the accelerated weathering chamber or the natural atmospheric stations and (2) the correlation between them allowed explaining some problems arising in service. This information will allow extending the useful life by adjusting the painting system formulation.