TY - JOUR
T1 - Formation of corrosion-resistant films on AlZnMg alloy by steam coating using acidic Zn(NO3)2 aqueous solutions+
AU - Yokomizo, Tetsuya
AU - Shimada, Yuta
AU - Tsunakawa, Mika
AU - Serizawa, Ai
AU - Ishizaki, Takahiro
N1 - Funding Information:
This research was supported by “Formulating new guiding principles based on heterostructural control for the creation of metals for innovative structures,” an Industry-Academia Collaborative Basic and Fundamental Research Project of the Japan Science and Technology Agency (JST) (No. 20100120), to whom we would like to express our gratitude here.
Publisher Copyright:
© 2018 The Japan Institute of Light Metals.
PY - 2018
Y1 - 2018
N2 - Corrosion-resistant films were fabricated on AlZnMg alloy by steam coating using an acidic aqueous solution of Zn(NO3)2 at different concentrations. X-ray diffraction patterns and Fourier transform-infrared spectrometer spectra demonstrated that nitrate-type ZnAl layered double hydroxide (LDH) and ZnO films were formed on the AlZnMg surface by steam coating at temperatures of 373, 433, and 473 K, using Zn(NO3)2 aqueous solution at 1000 mM. At 513 K, £-AlO(OH) films were formed on the AlZnMg surface by steam coating using 1 to 100 mM Zn(NO3)2 aqueous solution. The corrosion resistance of the films was investigated by potentiodynamic polarization curve measurements, which revealed that the £-AlO(OH) films prepared by steam coating at 513 K using 1 mM of Zn(NO3)2 aqueous solution was the most effective treatment for suppression of pitting corrosion and anodic current density.
AB - Corrosion-resistant films were fabricated on AlZnMg alloy by steam coating using an acidic aqueous solution of Zn(NO3)2 at different concentrations. X-ray diffraction patterns and Fourier transform-infrared spectrometer spectra demonstrated that nitrate-type ZnAl layered double hydroxide (LDH) and ZnO films were formed on the AlZnMg surface by steam coating at temperatures of 373, 433, and 473 K, using Zn(NO3)2 aqueous solution at 1000 mM. At 513 K, £-AlO(OH) films were formed on the AlZnMg surface by steam coating using 1 to 100 mM Zn(NO3)2 aqueous solution. The corrosion resistance of the films was investigated by potentiodynamic polarization curve measurements, which revealed that the £-AlO(OH) films prepared by steam coating at 513 K using 1 mM of Zn(NO3)2 aqueous solution was the most effective treatment for suppression of pitting corrosion and anodic current density.
KW - AlZnMg alloy
KW - Corrosion resistance
KW - Layered double hydroxide
KW - Steam coating process
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U2 - 10.2320/matertrans.L-M2018819
DO - 10.2320/matertrans.L-M2018819
M3 - Article
AN - SCOPUS:85049184256
SN - 1345-9678
VL - 59
SP - 1166
EP - 1172
JO - Materials Transactions
JF - Materials Transactions
IS - 7
ER -