The effects of alkaline noncyanide zinc plating bath formulation on the plating characteristics and deposit properties are investigated. Scanning electron microscope and x-ray diffractometer are used to study the surface morphology and texture of the zinc deposits, respectively. Uniform and compact coatings with a dominant (110) texture are obtained for all of the bath formulations. Nevertheless, significant differences in surface morphology and relative preferences for the (110) and (100) planes were found to result from the concentrations of zinc and sodium hydroxide in the bath. Electrochemical impedance spectroscopy and potentiodynamic polarization scan were used to evaluate the corrosion resistance. The coatings with a moderate Zn (8 g/L to 11 g/L) and controlled NaOH (120 g/L) contents show good corrosion resistance, with the corrosion current and corrosion rate being the lowest at 8 g/L of Zn and 120 g/L of NaOH. The ratios of texture coefficient, morphology, and compressive residual stress from different bath composition contribute to the corrosion-resistant property. The findings from this work should provide useful information regarding electrogalvanized zinc coatings with enhanced corrosion resistance.
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1 August 2021
Research Article|
April 26 2021
Effects of Alkaline Zinc Bath Formulations on Electrochemical Corrosion Behavior of Electrogalvanized Coatings Available to Purchase
Thanyalux Wanotayan;
Thanyalux Wanotayan
*Metallurgy and Materials Science Research Institute, Chulalongkorn University, Pathumwan, Bangkok 10330, Thailand.
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Tongjai Chookajorn;
Tongjai Chookajorn
**National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand.
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Sirikarn Sattawitchayapit;
Sirikarn Sattawitchayapit
**National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand.
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Piya Khamsuk;
Piya Khamsuk
**National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand.
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Kanokwan Saengkiettiyut;
Kanokwan Saengkiettiyut
*Metallurgy and Materials Science Research Institute, Chulalongkorn University, Pathumwan, Bangkok 10330, Thailand.
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Namurata Sathirachinda Pålsson;
Namurata Sathirachinda Pålsson
**National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand.
***Division of Material and Production, Department of Corrosion, Vehicles and Surface ProtectionUnit, Research Institutes of Sweden, 164 40 Kista, Sweden.
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Martin Metzner;
Martin Metzner
****Department of Electroplating, Fraunhofer Institute of Manufacturing Engineering and Automation IPA, Stuttgart 70569, Germany.
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Wanida Pongsaksawad;
Wanida Pongsaksawad
‡
**National Metal and Materials Technology Center (MTEC), National Science and Technology Development Agency (NSTDA), Pathum Thani 12120, Thailand.
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Yuttanant Boonyongmaneerat
Yuttanant Boonyongmaneerat
‡
*Metallurgy and Materials Science Research Institute, Chulalongkorn University, Pathumwan, Bangkok 10330, Thailand.
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Online ISSN: 1938-159X
Print ISSN: 0010-9312
© 2021, AMPP
2021
CORROSION (2021) 77 (8): 829–837.
Citation
Thanyalux Wanotayan, Tongjai Chookajorn, Sirikarn Sattawitchayapit, Piya Khamsuk, Kanokwan Saengkiettiyut, Namurata Sathirachinda Pålsson, Martin Metzner, Wanida Pongsaksawad, Yuttanant Boonyongmaneerat; Effects of Alkaline Zinc Bath Formulations on Electrochemical Corrosion Behavior of Electrogalvanized Coatings. CORROSION 1 August 2021; 77 (8): 829–837. https://doi.org/10.5006/3760
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