<abstract xmlns="http://www.w3.org/1999/xhtml"><p> A comparison of the influence of two alloy pre-treatments and temperature treatments on the formation and composition of zirconium based conversion coating on the AA2024 alloy has been performed. The investigation employed mass changes, atomic force microscopy (AFM), XRD dispersive spectroscopy (EDX), infrared spectroscopy (IR) and electrochemical tests by open circuit potential (OCP) measurements. Pre-treatment using only alkaline etching is called alkaline pre-treatment. When alkaline etching is followed by de-oxidization in a phosphoric acid solution the process is called acidic pre-treatment. Conversion coatings were formed in Pragokor BL. IR analysis revealed the formation of a phosphate on the alloy surface. EDX analysis showed Mg dissolution. The Zr content increased with the temperature of the conversion coating formation. Both pre-treatment methods provided a phosphate layer on the alloy surface.</p></abstract>

A comparison of the influence of two alloy pre-treatments and temperature treatments on the formation and composition of zirconium based conversion coating on the AA2024 alloy has been performed. The investigation employed mass changes, atomic force microscopy (AFM), XRD dispersive spectroscopy (EDX), infrared spectroscopy (IR) and electrochemical tests by open circuit potential (OCP) measurements. Pre-treatment using only alkaline etching is called alkaline pre-treatment. When alkaline etching is followed by de-oxidization in a phosphoric acid solution the process is called acidic pre-treatment. Conversion coatings were formed in Pragokor BL. IR analysis revealed the formation of a phosphate on the alloy surface. EDX analysis showed Mg dissolution. The Zr content increased with the temperature of the conversion coating formation. Both pre-treatment methods provided a phosphate layer on the alloy surface.

Influence of pre-treatment on zirconium based conversion coating on AA2024

Acta Chimica Slovaca

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

{"article-title":"Influence of pre-treatment on zirconium based conversion coating on AA2024"}

A comparison of the influence of two alloy pre-treatments and temperature treatments on the formation and composition of zirconium based conversion coating on...

Influence of pre-treatment on zirconium based conversion coating on AA2024

Online veröffentlicht: 29. Dez. 2017

Seitenbereich: 101 - 106

DOI: https://doi.org/10.1515/acs-2017-0018

Schlüsselwörter
aluminium alloy 2024, zirconium based conversion coating, OCP measurement, IR spectroscopy

© Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Influence of pre-treatment on zirconium based conversion coating on AA2024

Online veröffentlicht: 29. Dez. 2017

Seitenbereich: 101 - 106

DOI: https://doi.org/10.1515/acs-2017-0018

Schlüsselwörteraluminium alloy 2024, zirconium based conversion coating, OCP measurement, IR spectroscopy

© Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 License.

Schlüsselwörter
aluminium alloy 2024, zirconium based conversion coating, OCP measurement, IR spectroscopy