Acta Univ. Agric. Silvic. Mendelianae Brun. 2013, 61(6), 1889-1896 | DOI: 10.11118/actaun201361061889

Influence of roughness of machined surface on adhesion of anticorrosion system

Jiří Votava
Department of Engineering and Automobile Transport. Mendel University in Brno, Zemědělská 1, 613 00 Brno, Czech Republic

The goal of this experiment is to analyse dependence of roughness of machined surface on adhesion performance of various anticorrosion systems. In order to prepare samples for the experiment, samples were milled on a knee and column type of a horizontal milling machine. Depending on cutting conditions and machining tool, there were set intervals of roughness of machined surface which are commonly achievable on this type of machine. It is a roughness in the interval of 0.4-1.6 µm (finishing), 1.6-6.3 µm (standard milling) a 6.3-12.5 µm (roughening). Removable cutting tips were used as a machining tool and for roughening, a shell end milling cutter NAREX 63x40 HSS 90 was used.
Three types of anticorrosion systems were used in order to analyse the adhesion, that is a water-thinnable system Eternal, synthetic single layer coating Hostagrund and a duplex system, whose first layer is formed by dipped zinc and a top layer by a single-layer acrylate system Zinorex. Testing of the influence of surface roughness (anchoring system) on adhesion of the individual anticorrosion systems were processed in compliance with the norm ČSN EN ISO 4624, a tearing test. The main criterion of adhesion of anticorrosion system is defined as a power which needed for tear-off testing object stuck to a tested sample. This analysis was processed also during the corrosion test in the salt spray environment according to the norm ČSN EN ISO 9227. In order to better identify the adhesion of the individual anticorrosion systems, the analysis of undercorrosion according to the norm ISO 4628-8 was processed.

Keywords: surface roughness, corrosion, adhesion, cutting operation

Received: September 3, 2013; Published: November 24, 2013  Show citation

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Votava, J. (2013). Influence of roughness of machined surface on adhesion of anticorrosion system. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 61(6), 1889-1896. doi: 10.11118/actaun201361061889
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