SZŁAPA Ilona BISPOL S.A.

Spoluautoři JĘDRZEJCZYK Dariusz, SKOTNICKI Wojciech, HAJDUGA Maciej, WĘGRZYNKIEWICZ Sylwia

The paper contains the second part of the research which compares corrosion and mechanical properties of different zinc coatings. The following methods of zinc coating were applied: galvanic (PN-EN ISO 4042), hot-dip (PN-EN ISO 10684) and lamellar (PN-EN ISO 10683). The first stage of the experiment covered metallographic research: roughness coefficient measurement, morphological structure evaluation with the use of scanning and optical microscope, zinc layer thickness measurement, and corrosion research in salt chambers using the following tests: in the salt chamber with neutral NaCl (PN-EN ISO 9227), climatic chamber (VDA 621-415) and KESTERNICH (DIN 50018/2,0 SO2) chamber. The second stage of the experiment, presented in the following paper, refers to: tribological laboratory research, metallographic analysis of zinc coating microstructure in damaged areas, with the use of optical microscope, and the evaluation of the decrease in corrosion resistance as the result of destruction the continuousness of zinc layer. The corrosion research was conducted with the salt chamber with neutral NaCl (PN-EN ISO 9227). Having analyzed the results, it was stated that the lamellar coating is the most resistant to mechanical damage and therefore its corrosion resistance didn’t change essentially after the friction test. Galvanic and hot – dip coatings are less resistant to mechanical damage, and destruction the continuousness of protection layer structure affects their corrosion resistance significantly.

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