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51317--9638-Marine Corrosion Performance of Copper Alloy UNS C69100

Picture for Marine Corrosion Performance of Copper Alloy UNS C69100
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Electrochemical test methods including open-circuit potential, electrochemical impedance spectroscopy, potentiodynamic polarization, and zero-resistance ammetry were used for corrosion investigation of UNS C69100 in a 3.5 wt.% sodium chloride aqueous solution, with optical and scanning electron microscopy.

 

Product Number: 51317--9638-SG
ISBN: 9638 2017 CP
Author: Julian Wharton
Publication Date: 2017
Industry: Materials Selection and Design
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Marine Corrosion Performance of Copper Alloy UNS C69100Mengyan Nie aJulian A. Wharton a and John Zbihlyj ba National Centre for Advanced Tribology at Southampton (nCATS) Engineering Sciences University of Southampton Southampton SO17 1BJ UK.b Tungum Limited 200A Ashchurch Business Centre Alexandra Way Tewkesbury GL20 8TD UKCorrespondence e-mail: m.nie@soton.ac.ukABSTRACTTungum alloy (UNS C69100) is an aluminium-nickel-silicon brass (chemical composition: 81-84% Cu 0.70-1.20 Al 0.8-1.40 Ni 0.80-1.30 Si with the remainder Zn) and is reported to have a good corrosion performance in marine environments (fully wetted splash zone and atmospheric conditions). In order to gain an in-depth understanding of the marine corrosion performance of this alloy electrochemical test methods including open-circuit potential electrochemical impedance spectroscopy potentiodynamic polarization and zero-resistance ammetry were used for corrosion investigation of UNS C69100 in a 3.5 wt.% sodium chloride aqueous testing solution in combination with optical microscopy and scanning electron microscopy. The corrosion properties of UNS C69100 obtained by electrochemical methods are also compared to six other alloys: UNS S31603 UNS S31254 UNS S32750 UNS N04400 UNS N08904 and UNS C36000. Galvanic coupling behaviour of UNS C69100 against these six alloys in a 3.5% NaCl solution for 30 days immersion are also reported in this paper.KEYWORDS: Tungum alloy marine corrosion galvanic corrosion electrochemical impedance spectroscopy zero-resistance ammetry UNS C69100.

Key words: UNS C69100 alloy, marine corrosion, galvanic corrosion, electrochemical impedance spectroscopy, zero-resistance ammetry

Marine Corrosion Performance of Copper Alloy UNS C69100Mengyan Nie aJulian A. Wharton a and John Zbihlyj ba National Centre for Advanced Tribology at Southampton (nCATS) Engineering Sciences University of Southampton Southampton SO17 1BJ UK.b Tungum Limited 200A Ashchurch Business Centre Alexandra Way Tewkesbury GL20 8TD UKCorrespondence e-mail: m.nie@soton.ac.ukABSTRACTTungum alloy (UNS C69100) is an aluminium-nickel-silicon brass (chemical composition: 81-84% Cu 0.70-1.20 Al 0.8-1.40 Ni 0.80-1.30 Si with the remainder Zn) and is reported to have a good corrosion performance in marine environments (fully wetted splash zone and atmospheric conditions). In order to gain an in-depth understanding of the marine corrosion performance of this alloy electrochemical test methods including open-circuit potential electrochemical impedance spectroscopy potentiodynamic polarization and zero-resistance ammetry were used for corrosion investigation of UNS C69100 in a 3.5 wt.% sodium chloride aqueous testing solution in combination with optical microscopy and scanning electron microscopy. The corrosion properties of UNS C69100 obtained by electrochemical methods are also compared to six other alloys: UNS S31603 UNS S31254 UNS S32750 UNS N04400 UNS N08904 and UNS C36000. Galvanic coupling behaviour of UNS C69100 against these six alloys in a 3.5% NaCl solution for 30 days immersion are also reported in this paper.KEYWORDS: Tungum alloy marine corrosion galvanic corrosion electrochemical impedance spectroscopy zero-resistance ammetry UNS C69100.

Key words: UNS C69100 alloy, marine corrosion, galvanic corrosion, electrochemical impedance spectroscopy, zero-resistance ammetry

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