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Journal of Coatings Technology and Research

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01.12.2009 | Brief Communication

The influence of dissolved ozone in a phosphate bath on phosphate coatings on carbon steel

verfasst von: Minqi Sheng, Yinyin Wei, Qindong Zhong

Erschienen in: Journal of Coatings Technology and Research | Ausgabe 4/2009

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Abstract

The influence of dissolved ozone (O₃) and its concentrations on the formation of phosphate coatings on carbon steel in phosphate bath, as well as the protective properties of phosphate coatings in a 5 wt% NaCl solution have been studied. The structure, surface morphologies, and phase compositions of the phosphate coating on the carbon steel substrate was investigated by SEM, XRD. It is shown that the phosphate coating became more dense with fewer microholes and an increasing concentration of ozone in phosphate bath in the range of 0.0 to 1.62 mg/L. The coating compositions were Zn₃(PO₄)₂ · 4H₂O (hopeite) and Zn₂Fe(PO₄)₂ · 4H₂O. Potentiodynamic polarization and immersion tests were used to evaluate the corrosion properties of the treated samples. The coating showed good corrosion resistance properties.

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Titel: The influence of dissolved ozone in a phosphate bath on phosphate coatings on carbon steel
verfasst von: Minqi Sheng
Yinyin Wei
Qindong Zhong
Publikationsdatum: 01.12.2009
Verlag: Springer US
Erschienen in: Journal of Coatings Technology and Research / Ausgabe 4/2009
Print ISSN: 1547-0091
Elektronische ISSN: 1935-3804
DOI: https://doi.org/10.1007/s11998-008-9159-8

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