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Journal of Chinese Society for Corrosion and protection  2023, Vol. 43 Issue (3): 578-586    DOI: 10.11902/1005.4537.2022.151
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Corrosion Behavior of Galvanized Steel in a Simulated Marine Atmospheric Environment
WANG Jin1, NING Peidong1, LIU Qianqian2, CHEN Nana2, ZHANG Xin3, XIAO Kui2()
1.Research Institute, JISCO Hongxing Iron and Steel Co. Ltd., Jiayuguan 735100, China
2.Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China
3.Testing Center of University of Science and Technology Beijing Co. Ltd., Beijing 100083, China
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The corrosion behavior of hot-dip galvanized steel after various test cycles in simulate marine atmospheric environment was assessed by mass loss method, 3D confocal microscope, electrochemical impedance spectroscope (EIS), scanning electron microscope (SEM), energy dispersive spectrometer (EDS), X-ray diffractometer (XRD) and X-ray photoelectron spectroscope (XPS). The results show that the corrosion rate of the steel samples was higher at the beginning of the experiment, then decreased at 56 d, and increased again at 104 d, which might be related to the formation of corrosion products. After being tested for 56 d, the steel suffered form mainly uniform corrosion, the main corrosion products were hydroxyzinc chloride (Zn5(OH)8Cl2·H2O), zinc oxide (ZnO) and basic zinc carbonate (Zn5(OH)6(CO3)2). In the simulated marine atmospheric environment, the corrosion resistance of the hot-dip galvanized coating failed quickly. Whilst, the corrosion rate has been accelerating until the formation of a relatively complete corrosion product film on the existed damaged areas, hence, the corrosion product film has a certain inhibitory effect on the corrosion of the coating.

Key words:  hot-dip galvanized steel      marine atmospheric environment      indoor acceleration test      corrosion mechanism     
Received:  14 May 2022      32134.14.1005.4537.2022.151
ZTFLH:  TG174  
Fund: National Materials Corrosion and Protection Date Center
Corresponding Authors:  XIAO Kui, E-mail:

Cite this article: 

WANG Jin, NING Peidong, LIU Qianqian, CHEN Nana, ZHANG Xin, XIAO Kui. Corrosion Behavior of Galvanized Steel in a Simulated Marine Atmospheric Environment. Journal of Chinese Society for Corrosion and protection, 2023, 43(3): 578-586.

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Time / dMass loss / g·m-2Average corrosion depth / μmAverage corrosion rate / μm·a-1
Table 1  Corrosion mass loss data of GI plate in simulated marine atmospheric environment
Fig.1  Corrosion dynamics correlation curves of GI plate in simulated marine atmospheric environment: (a) thickness loss and average corrosion rate curves, (b) instantaneous corrosion rate
Fig.2  XRD spectra of GI panels after different periods of accelerated corrosion test in simulated marine atmospheric environment
Fig.3  XPS spectra of GI panels after different cycles of accelerated corrosion test in simulated marine atmospheric environment: (a) Zn 2p3/2, (b) C 1s, (c) O 1s, (d) Cl 2p
Fig.4  Macroscopic corrosion morphologies of GI panels after 0 d (a), 24 d (b), 40 d (c), 56 d (d), 72 d (e), 88 d (f), 104 d (g) and 120 d (h) of accelerated corrosion test in simulated marine atmospheric environment
Fig.5  3D confocal morphologies of GI panels after derusting in 24 d (a), 56 d (b), 104 d (c) and 120 d (d) in simulated marine atmospheric environment
Fig.6  Corrosion morphologies of GI panels after 24 d (a1, a2), 56 d (b1, b2), 104 d (c1, c2) and 120 d (d1, d2) in simulated marine atmospheric environment
PositionC KO KZn KCl KFe KP K
Table 2  EDS results of GI panels after different test periods of simulated marine atmospheric environment
Fig.7  Micro-morphologies and element surface distribution of the GI coating section after 24 d (a), 56 d (b), 104 d (c) and 120 d (d) in simulated marine atmospheric environment
Fig.8  Electrochemical impedance spectra of GI plates in acidic (1±0.1) g/L NaHSO3 solution after different test cycles: (a) Nyquist diagram, (b) Bode mode diagram, (c) Bode phase diagram
Fig.9  Equivalent circuits of GI plate in acidic (50±5) g/L NaCl solution: (a) 24, 56 and 104 d, (b) 120 d
Time / dRs / Ω·cm2Rf / Ω·cm2Q1 / F·cm-2n1Q2 / F·cm-2n2Rr / Ω·cm2Q3 / F·cm-2n3Rct / Ω·cm2Chi-squared
Table 3  Equivalent circuit element fitting values of GI plate in acidic (50±5) g/L NaCl solution
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