Acta Univ. Agric. Silvic. Mendelianae Brun. 2013, 61(5), 1487-1495 | DOI: 10.11118/actaun201361051487

Corrosion resistance of zinc-based systems in NaCl environment

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

Metal components in engineering, industry and agriculture are subjects of degradation process influenced by corrosion which result in changes of mechanical characteristics. The current trend of anticorrosion protection is aimed at inorganic metal zinc-based coatings, such as zinc dipping which can be improved by duplex protection. This paper deals with two types of corrosion protection of steel components by zinc coating, first of which is produced by hot dip galvanizing, the other by Zn-Al spray.
Hot dip galvanizing was processed in working conditions; the Zn-Al coating was sprayed following the instructions of producer. It is a special aerosol with particles of Zn and Al sized approximately 5 µm. There have been processed the following tests: analysis of element structure, test of corrosion resistance in aggressive environment of salt spray according to ČSN ISO 9227, further measurement weight of applied coatings according to ČSN EN ISO 3892 and measurement of thickness of passivating coating. There was also made an analysis of coating tenacity on bending pin according to ČSN EN ISO 8401. Quality of applied coatings was evaluated following the metallographic scratch pattern.

Keywords: hot dip galvanizing, zinc spray, renovation, cracks, corrosion

Received: June 17, 2013; Published: September 28, 2013  Show citation

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Votava, J. (2013). Corrosion resistance of zinc-based systems in NaCl environment. Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis, 61(5), 1487-1495. doi: 10.11118/actaun201361051487
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